AutomaticRecordDigitalizer

Shopping list, priced 10 September 2026

Every line of docs/04-bill-of-materials.md against live German shop pages, incl. 19 % VAT, delivered to Germany, excluding shipping in the unit prices and adding it per supplier at the end of each route.

Three ways to order the same machine. Rows at 0,00 € are hardware already owned or supplied by a donor printer; they are listed so the build stays complete, and they carry no cost so the totals stay honest. Plywood, Baumarkt items and filament are excluded throughout.

Prices drift — re-check before ordering. Lines marked ESTIMATE could not be fetched, because Amazon.de and Conrad.de block automated access.

Route	Parts	Shipping	Delivered
Cheapest per item	821,60	67,15	888,75
Fewest suppliers	758,70	37,60	796,30
Donor printer route	599,69	42,05	641,74

The notes under each route call them sheet 1, sheet 2 and sheet 3, in the order of the table above.

The corrections this pass produced, and which repo documents absorbed them, are in 2026-09-sourcing-and-bom-corrections.md.

Cheapest per item

Sourced from German shops, delivered to Germany. Prices incl. 19% VAT, verified 10 September 2026. Source BOM: github.com/drehtuer/AutomaticRecordDigitalizer/blob/main/docs/04-bill-of-materials.md

Group	Part	Qty	Unit €	Line €	Supplier	Note
Frame	Aluprofil 2040 V-Slot Nut 6 black, cut 1300 mm (12,90 €/m)	2	16,77	33,54	shop.bohrers.de	verified 10.09.2026; X beams, max cut 1450 mm
Frame	Aluprofil 2040 V-Slot Nut 6 black, cut 800 mm (cross beam)	1	10,32	10,32	shop.bohrers.de	verified 10.09.2026
Frame	V-Slot 2020 profile, black, 1 m (end tie, cut to 800 mm)	1	5,95	5,95	roboter-bausatz.de	verified 10.09.2026
Frame	2020 Winkel Nut 6 mit Nutfuehrung, silver (brackets)	20	0,55	11,00	roboter-bausatz.de	verified 10.09.2026; 0,55 € from 20 pcs
Frame	Nutenstein M5 Nut 6, slide-in (T-nuts)	50	0,25	12,50	roboter-bausatz.de	verified 10.09.2026; 0,25 € from 100 pcs -> order 100
Frame	20x M5 Hammerkopfschraube Nut 6, 10 mm (T-head bolts, 5 packs = 100)	5	1,49	7,45	roboter-bausatz.de	verified 10.09.2026
Linear	Solid Delrin V Wheel Kit (wheel + 2x 625 bearings + shim + nut + screw)	9	4,15	37,35	roboter-bausatz.de	verified 10.09.2026; Dual V-Wheel Kit at 2,65 €/pc saves 13,50 €
Linear	Exzentrischer Abstandshalter 5 mm (eccentric spacers)	6	1,29	7,74	roboter-bausatz.de	verified 10.09.2026; never included in wheel kits
Linear	MGN12 linear rail, cut 800 mm (35,00 €/m) - Z column	1	28,00	28,00	shop.bohrers.de	verified 10.09.2026; ships oiled, clean and re-lube
Linear	MGN12H carriage / Lagerbock	1	11,00	11,00	shop.bohrers.de	verified 10.09.2026
Motion	NEMA17 stepper 17HS4417P1, 1.7 A, 40 Ncm, 40 mm (X, Y, Z)	3	15,54	46,62	roboter-bausatz.de	verified 10.09.2026
Motion	NEMA17 planetary gearbox 5:1, 44 Ncm, 1.68 A (wrist, carousel)	2	32,38	64,76	oyostepper.de	verified 10.09.2026; no German shop consolidates this
Motion	GT2 open timing belt 6 mm, 10 m	1	9,99	9,99	roboter-bausatz.de	verified 10.09.2026; 10 m cheaper than the 5 m rolls
Motion	GT2 pulley 20T, bore 5 mm, for 6 mm belt	4	0,77	3,08	roboter-bausatz.de	verified 10.09.2026
Motion	GT2 idler 20T, bore 5 mm, dual ball bearing	4	1,55	6,20	roboter-bausatz.de	verified 10.09.2026
Motion	Smooth Idler Spannrolle Kit (belt tensioner)	2	5,15	10,30	roboter-bausatz.de	verified 10.09.2026
Motion	Trapezgewindespindel T8 800x8 mm with brass nut	1	15,29	15,29	roboter-bausatz.de	verified 10.09.2026
Motion	Shaft coupling 5 mm -> 8 mm (rigid)	1	1,99	1,99	roboter-bausatz.de	verified 10.09.2026; flexible jaw coupler out of stock at RB
Motion	KFL08 flange bearing block, 2 pcs	1	2,87	2,87	roboter-bausatz.de	verified 10.09.2026
Servos	Actuonix PQ12-S micro linear actuator, 20 mm stroke, limit switches	1	123,49	123,49	nodna.de	verified 10.09.2026; BOM budgets 12 € - see note 3, MG996R servo + printed linkage = 6,65 €
Controller	BIGTREETECH BIQU Octopus V1.1 mainboard	1	65,95	65,95	roboter-bausatz.de	verified 10.09.2026
Controller	5x BIGTREETECH TMC2209 V1.3 UART incl. heatsinks	1	25,75	25,75	roboter-bausatz.de	verified 10.09.2026; 5-pack saves 3,70 € vs singles
Power	MEAN WELL LRS-150-24, 24 V / 6.5 A / 150 W	1	18,50	18,50	reichelt.de	verified 10.09.2026; Pollin has it at 17,40 € - not worth a 13th order
Power	Mini step-down module 3 A, 4.5-28 V in -> 5 V	1	1,29	1,29	roboter-bausatz.de	verified 10.09.2026
Computer	Raspberry Pi 4 Model B rev 1.1, 2 GB RAM (2 on hand; 2nd = cold spare)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - saves 120,60 € and dodges the Pi 5 backorder. REV 1.1 WARNING: refuses power from e-marked USB-C cables; use the official PSU or a plain cable. Verify: cat /proc/cpuinfo -> a03111
Computer	Official Raspberry Pi 15W USB-C PSU (Pi 4 takes 15 W, not 27 W)	—	—	0,00	ALREADY OWNED	ALREADY OWNED presumed - check you still have the Pi 4 supplies. Do NOT run the Pi off the servo 5 V buck: an MG996R stalls at ~2.5 A and will brown out the Pi
Computer	microSD card 32 GB (OS, Klipper, orchestrator, logs only)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - 32 GB is ample; nothing the machine records is written to it
Computer	External USB 3.0 SSD for the WAV files, >=500 GB	—	—	0,00	ALREADY OWNED	ALREADY OWNED / to hand. ~860 MB per side, ~40 GB per full 24-slot magazine. SSD not HDD: a bus-powered 2.5in HDD pulls ~0.9 A on spin-up and is a vibration source next to the turntable
Computer	Self-powered USB 3.0 hub (Scarlett + SSD + webcam + relay card)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - the Pi 4 budgets only ~1.2 A across all four ports. Route everything through the powered hub, and pin device names with udev rules so /dev/video* and the ALSA index do not shuffle on reboot
Cameras	Raspberry Pi Camera Module 3, 12 MP (deck camera)	1	25,90	25,90	welectron.com	verified 10.09.2026; only one needed now - the Pi 4B has a single CSI port
Cameras	Raspberry Pi camera cable Standard-Mini, 500 mm	1	3,50	3,50	berrybase.de	verified 10.09.2026; the 200 mm cable in the box may already reach; Pi 4 uses the standard 15-pin, no adapter needed
Cameras	Trust HD1080p USB webcam (wrist camera)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - replaces the 2nd Cam Module 3 AND the CSI-HDMI extender. Lock focus, exposure, gain and white balance before use; check what the model exposes: v4l2-ctl -d /dev/video0 –list-ctrls-menus
Vacuum	Miniature diaphragm vacuum pump 12 V DC, 3 W, ca. 80 kPa	1	10,59	10,59	funduinoshop.com	verified 10.09.2026; 16 in stock
Vacuum	2/2-way solenoid valve G 1/8 NC, FKM, 12 V, direct acting (DA142426)	1	42,44	42,44	druckluft-fachhandel.de	verified 10.09.2026; MUST be direct acting - pilot valves do not open under vacuum
Vacuum	Adafruit MPRLS pressure sensor breakout 0-25 PSI, I2C	1	30,90	30,90	berrybase.de	verified 10.09.2026; OUT OF STOCK. Industrial vacuum switch = 95,30 €
Vacuum	Balgensauger D 40 mm, 1.5 folds, NBR, with G 1/4 fitting	1	21,37	21,37	morali.de	verified 10.09.2026; or print the cup lip in TPU per the BOM printed-parts list
Vacuum	Polyurethane tube 6 x 4 mm, natural, per metre	5	1,05	5,25	druckluft-fachhandel.de	verified 10.09.2026
Vacuum	Straight push-in fitting G 1/8 - 6 mm, IQS, -0.95 to 20 bar	8	1,38	11,04	druckluft-fachhandel.de	verified 10.09.2026; vacuum rated
Sensing	3x mechanical end-stop with 50 cm cable, 3-pin	1	3,49	3,49	roboter-bausatz.de	verified 10.09.2026
Sensing	Mechanical end-stop with 50 cm cable, single	2	0,75	1,50	roboter-bausatz.de	verified 10.09.2026
Sensing	Hall magnetic sensor module KY-003 (A3144), digital	1	0,90	0,90	berrybase.de	verified 10.09.2026; 100+ in stock
Sensing	KY-010 photo interrupter / slot optical sensor module	1	1,25	1,25	roboter-bausatz.de	verified 10.09.2026
Deck I/O	NFKE MG 63 audio cable, 6.3 mm mono jack, 1.8 m (cut one end)	1	1,56	1,56	reichelt.de	verified 10.09.2026; remote start/stop jack
Light	LED strip warm white, 12 V, 5 m (cut to 50 cm)	1	5,85	5,85	reichelt.de	verified 10.09.2026
Light	INFINEON IRLZ44N logic-level MOSFET, N-Ch 55 V 47 A, TO-220	2	0,67	1,34	reichelt.de	verified 10.09.2026; do NOT use IRF520 modules - not logic level
Carousel	Miniature ball bearing 608-ZZ 8x22x7 mm (rollers)	10	0,79	7,90	dold-mechatronik.de	verified 10.09.2026
Carousel	Deep groove ball bearing 6005-2RS 25x47x12 mm	1	1,79	1,79	dold-mechatronik.de	verified 10.09.2026; cheaper than Kugellager-Express at 2,08 €
Carousel	Precision shaft 25 mm h6, hardened, cut 100 mm (stub shaft)	1	3,29	3,29	dold-mechatronik.de	verified 10.09.2026
Cabling	Energiekette 10x20 R28, open, 1 m (end brackets included)	3	5,61	16,83	cnc-zubehoer.eu	verified 10.09.2026; cheapest chain found; Dold CK10 is 9,57 €/m plus connectors
Cabling	610-piece Dupont crimp connector set in box	1	9,90	9,90	berrybase.de	verified 10.09.2026
Cabling	200-piece jumper wire connector kit, JST-SM / Dupont 2.54 mm	1	3,90	3,90	berrybase.de	verified 10.09.2026
Cabling	Silicone wire 20 AWG, red + black, per metre	10	1,55	15,50	roboter-bausatz.de	verified 10.09.2026
Cabling	Heat shrink assortment Delock 86278, 230 pcs, 1.5-13 mm	1	6,99	6,99	reichelt.de	verified 10.09.2026
Hardware	Hex socket screw / nut / washer assortment, 520 pcs, M3-M6, stainless	1	18,70	18,70	roboter-bausatz.de	verified 10.09.2026
Hardware	ruthex M3x5.7 heat-set threaded inserts, 100 pcs	1	8,99	8,99	reichelt.de	verified 10.09.2026; same price at 3DJake

Totals for this route: parts 821,60 €, shipping 67,15 €, delivered 888,75 €.

Shipping

Supplier	Order value €	Shipping €	Rule
shop.bohrers.de	82,86	12,90	Long goods >1 m - estimate, cart shows final
roboter-bausatz.de	311,76	0,00	Free from 99 € gross - reached
dold-mechatronik.de	12,98	6,90	DHL up to 1 m, <=2 kg: 6,90 €. No free threshold
berrybase.de	49,10	4,95	DHL 4,95 €; free from 150 € - not reached
reichelt.de	43,23	5,95	DHL <=10 kg 5,95 €. No free threshold
oyostepper.de	64,76	6,90	Estimate - no published rate
welectron.com	25,90	4,95	DPD 4,95 € - basket now under the 49 € free threshold (one camera instead of two plus extender)
nodna.de	123,49	0,00	Free within DE from 90 € - reached
funduinoshop.com	10,59	4,90	Estimate
druckluft-fachhandel.de	58,73	6,90	Estimate
morali.de	21,37	6,90	Estimate
cnc-zubehoer.eu	16,83	5,90	Estimate

Notes

• Prices verified by fetching the live product pages on 10.09.2026, incl. 19% German VAT, excl. shipping. Anything marked ESTIMATE could not be fetched (Amazon and Conrad block automated access) - check before ordering.
• Plywood, bench top and Baumarkt items are NOT in this list (your decision). Budget ~60 € locally for the 18 mm birch plywood sheet. Filament (PETG 2.5 kg + TPU 0.3 kg, ~70 €) is also not included.
• Biggest deviation from the BOM: the micro linear servo. The BOM budgets 12 €, but no sub-30 € linear servo is in stock at any German/EU shop. Verified options start at 90-123 €. An MG996R servo (6,65 € at roboter-bausatz.de) plus a printed pusher rod does the same job - that is what sheet 2 uses.
• Second deviation: the BOM’s 12 € vacuum switch. Industrial vacuum switches start at 95 € in Germany. The Adafruit MPRLS absolute pressure sensor (30,90 €) plus a software threshold replaces it.
• The Raspberry Pi line is gone: the build now runs on a Pi 4B 2 GB you already own. That also sidesteps the Pi 5 4 GB being out of stock at BerryBase, welectron and rasppishop, with Reichelt backordered to 27.10.2026. The trade is roughly 2 to 2.5x less CPU, which the workload absorbs - the only sustained vision load is the deck camera tracking the headshell in a known ROI, so keep those frames downscaled to around 640x480 at 10-15 fps and process the 12 MP label shots one at a time.
• Motedis carries no true V-slot profile (only B-Typ / I-Typ). It cannot be used for the wheel-running beams.
• This sheet buys every line as the BOM literally specifies it, each at its cheapest verified source - 12 suppliers, 12 parcels. Sheet 2 lands about 100 € LOWER, which is not a consolidation discount: about 117 € of it is the servo substitution and about 16 € the printed suction cup, offset by roughly 28 € of consolidation premium on rails, cameras and cable chain, and about 30 € less shipping. On identical parts the two sheets are within about 30 € of each other.
• ALREADY OWNED, shown as 0,00 € rows: 2x Raspberry Pi 4B rev 1.1 / 2 GB (one is the cold spare), their 32 GB cards and 15 W supplies, an external USB 3.0 SSD, a self-powered USB 3.0 hub, and the Trust HD1080p webcam as the wrist camera. Together that removes roughly 185 to 195 € depending on the sheet. Also already on hand and never in these lists: the Omnitronic DD 3120, the Focusrite Scarlett, the Conrad 393905 relay card and the 3D printer.
• Three Pi 4 gotchas worth reading before you wire anything: rev 1.1 boards refuse e-marked USB-C cables (use the official supply); rev 1.1 puts the SD-card voltage regulator on the underside next to the slot where it can be knocked off, so set the card up once and leave it; and the enclosed electronics box needs a heatsink and a fan on a Pi 4 under sustained vision load.
• Put the Scarlett, the SSD, the webcam and the relay card on the powered hub, not on the Pi. The Pi 4 budgets roughly 1.2 A across all four ports and this machine runs unattended for a weekend - a brown-out mid-side is a lost recording. Pin every device with a udev rule so /dev/video* and the ALSA card index do not shuffle across reboots.

Fewest suppliers

Same build, consolidated into 6 orders instead of 12. Prices incl. 19% VAT, verified 10 September 2026.

Group	Part	Qty	Unit €	Line €	Supplier	Note
Frame	Aluprofil 20x40 V-Typ Nut 6, cut 1300 mm (14,00 €/m + 0,50 € cut)	2	18,70	37,40	dold-mechatronik.de	verified 10.09.2026; price basis €/m + cut fee confirmed on page
Frame	Aluprofil 20x40 V-Typ Nut 6, cut 800 mm	1	11,70	11,70	dold-mechatronik.de	verified 10.09.2026
Frame	Aluprofil 20x20 V-Typ Nut 6, cut 800 mm (8,00 €/m + 0,50 € cut)	1	6,90	6,90	dold-mechatronik.de	verified 10.09.2026
Frame	Innenwinkel Stahl verzinkt 20 Nut 6, incl. 2x M4x6	20	1,18	23,60	dold-mechatronik.de	verified 10.09.2026
Frame	Nutenstein M5 Nut 6, slide-in (T-nuts)	50	0,25	12,50	roboter-bausatz.de	verified 10.09.2026; Dold charges 0,81 €/pc - 28 € more
Frame	20x M5 Hammerkopfschraube Nut 6, 10 mm (5 packs = 100)	5	1,49	7,45	roboter-bausatz.de	verified 10.09.2026
Linear	Solid Delrin V Wheel Kit	9	4,15	37,35	roboter-bausatz.de	verified 10.09.2026; Dold’s Rad D24x11 is unconfirmed as V-profile - do not risk it
Linear	Exzentrischer Abstandshalter 5 mm (eccentric spacers)	6	1,29	7,74	roboter-bausatz.de	verified 10.09.2026
Linear	Linearfuehrung MGN12R, 800 mm	1	37,60	37,60	dold-mechatronik.de	verified 10.09.2026; 9,60 € more than bohrers, saves one supplier
Linear	Linearwagen MGN12H	1	13,00	13,00	dold-mechatronik.de	verified 10.09.2026
Motion	NEMA17 stepper 17HS4417P1, 1.7 A, 40 Ncm (X, Y, Z)	3	15,54	46,62	roboter-bausatz.de	verified 10.09.2026
Motion	NEMA17 planetary gearbox 5:1, 44 Ncm (wrist, carousel)	2	32,38	64,76	oyostepper.de	verified 10.09.2026; the one line that cannot be consolidated - see note 2
Motion	GT2 timing belt 6 mm, per metre	5	2,50	12,50	dold-mechatronik.de	verified 10.09.2026
Motion	GT2 pulley 20T, bore 5.00 mm H7, with clamping screws	4	2,90	11,60	dold-mechatronik.de	verified 10.09.2026
Motion	Deflection pulley (smooth idler) 6 mm, D 12.73 mm, bore 5.00 mm	4	3,20	12,80	dold-mechatronik.de	verified 10.09.2026; genuinely smooth, better than a toothed idler
Motion	Smooth Idler Spannrolle Kit (belt tensioner)	2	5,15	10,30	roboter-bausatz.de	verified 10.09.2026
Motion	Trapezgewindespindel T8 800x8 mm with brass nut	1	15,29	15,29	roboter-bausatz.de	verified 10.09.2026; Dold has no 8x8 pitch
Motion	Shaft coupling 5 mm -> 8 mm (rigid)	1	1,99	1,99	roboter-bausatz.de	verified 10.09.2026
Motion	KFL08 flange bearing block, 2 pcs	1	2,87	2,87	roboter-bausatz.de	verified 10.09.2026
Servos	MG996R digital servo, metal gears (cue lever, with printed pusher rod)	1	6,65	6,65	roboter-bausatz.de	verified 10.09.2026; SUBSTITUTE for the linear servo - saves 117 € and one supplier
Controller	BIGTREETECH BIQU Octopus V1.1 mainboard	1	65,95	65,95	roboter-bausatz.de	verified 10.09.2026
Controller	5x BIGTREETECH TMC2209 V1.3 UART incl. heatsinks	1	25,75	25,75	roboter-bausatz.de	verified 10.09.2026
Power	MEAN WELL LRS-150-24, 24 V / 6.5 A / 150 W	1	18,50	18,50	reichelt.de	verified 10.09.2026
Power	Mini step-down module 3 A -> 5 V	1	1,29	1,29	roboter-bausatz.de	verified 10.09.2026
Computer	Raspberry Pi 4 Model B rev 1.1, 2 GB RAM (2 on hand; 2nd = cold spare)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - saves 118,50 €. REV 1.1: refuses e-marked USB-C cables, use the official PSU. Verify: cat /proc/cpuinfo -> a03111
Computer	Official Raspberry Pi 15W USB-C PSU (Pi 4 takes 15 W, not 27 W)	—	—	0,00	ALREADY OWNED	ALREADY OWNED presumed. Do NOT run the Pi off the servo 5 V buck - an MG996R stalls at ~2.5 A
Computer	microSD card 32 GB (OS, Klipper, orchestrator, logs only)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - nothing the machine records goes on it
Computer	External USB 3.0 SSD for the WAV files, >=500 GB	—	—	0,00	ALREADY OWNED	ALREADY OWNED / to hand. ~860 MB per side, ~40 GB per magazine. SSD not HDD - spin-up current and vibration
Computer	Self-powered USB 3.0 hub (Scarlett + SSD + webcam + relay card)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - Pi 4 gives only ~1.2 A across all ports. Pin device names with udev rules
Cameras	Raspberry Pi Camera Module 3, 12 MP (deck camera)	1	28,90	28,90	berrybase.de	verified 10.09.2026; only one needed - the Pi 4B has a single CSI port
Cameras	Raspberry Pi camera cable Standard-Mini, 500 mm (deck camera)	1	3,50	3,50	berrybase.de	verified 10.09.2026; the 200 mm cable in the box may already reach
Cameras	Trust HD1080p USB webcam (wrist camera)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - one CSI port means the wrist camera goes USB, which docs/03 already sanctions as simpler and adequate. Lock focus/exposure/gain/WB: v4l2-ctl -d /dev/video0 –list-ctrls-menus
Vacuum	Mikro Membran-Vakuumpumpe 12 V (YW11-DC12), 1 L/min	1	11,40	11,40	berrybase.de	verified 10.09.2026; currently not available - Funduinoshop has one at 10,59 €
Vacuum	2/2-way solenoid valve G 1/8 NC, FKM, 12 V, direct acting	1	42,44	42,44	druckluft-fachhandel.de	verified 10.09.2026
Vacuum	Adafruit MPRLS pressure sensor breakout 0-25 PSI, I2C	1	30,90	30,90	berrybase.de	verified 10.09.2026; out of stock
Vacuum	Saugeranschlussnippel NW 2.40 mm, G 1/8 AG (cup lip printed in TPU)	1	5,00	5,00	druckluft-fachhandel.de	ESTIMATE - not verified; the BOM lists the TPU cup lip as a printed part
Vacuum	Polyurethane tube 6 x 4 mm, natural, per metre	5	1,05	5,25	druckluft-fachhandel.de	verified 10.09.2026
Vacuum	Straight push-in fitting G 1/8 - 6 mm, IQS	8	1,38	11,04	druckluft-fachhandel.de	verified 10.09.2026
Sensing	3x mechanical end-stop with 50 cm cable, 3-pin	1	3,49	3,49	roboter-bausatz.de	verified 10.09.2026
Sensing	Mechanical end-stop with 50 cm cable, single	2	0,75	1,50	roboter-bausatz.de	verified 10.09.2026
Sensing	Hall magnetic sensor module KY-003 (A3144)	1	0,90	0,90	berrybase.de	verified 10.09.2026
Sensing	KY-010 photo interrupter / slot optical sensor module	1	1,25	1,25	roboter-bausatz.de	verified 10.09.2026
Deck I/O	NFKE MG 63 audio cable, 6.3 mm mono jack, 1.8 m	1	1,56	1,56	reichelt.de	verified 10.09.2026
Light	LED strip warm white, 12 V, 5 m	1	5,85	5,85	reichelt.de	verified 10.09.2026
Light	INFINEON IRLZ44N logic-level MOSFET, TO-220	2	0,67	1,34	reichelt.de	verified 10.09.2026
Carousel	Miniature ball bearing 608-ZZ 8x22x7 mm	10	0,79	7,90	dold-mechatronik.de	verified 10.09.2026
Carousel	Deep groove ball bearing 6005-2RS 25x47x12 mm	1	1,79	1,79	dold-mechatronik.de	verified 10.09.2026
Carousel	Precision shaft 25 mm h6, hardened, cut 100 mm	1	3,29	3,29	dold-mechatronik.de	verified 10.09.2026
Cabling	Energiekette CK10, 20 mm wide, 1000 mm, inner 10x20	3	9,57	28,71	dold-mechatronik.de	verified 10.09.2026; 12 € more than cnc-zubehoer, saves a supplier
Cabling	Energiekette CK10 connection elements, 1 pair	2	2,50	5,00	dold-mechatronik.de	verified 10.09.2026; not included with the chain
Cabling	610-piece Dupont crimp connector set in box	1	9,90	9,90	berrybase.de	verified 10.09.2026
Cabling	200-piece jumper wire connector kit, JST-SM / Dupont	1	3,90	3,90	berrybase.de	verified 10.09.2026
Cabling	Silicone wire 20 AWG, red + black, per metre	10	1,55	15,50	roboter-bausatz.de	verified 10.09.2026
Cabling	Nylon braided sleeving 15 mm, per metre	5	0,32	1,60	roboter-bausatz.de	verified 10.09.2026
Cabling	Heat shrink assortment Delock 86278, 230 pcs	1	6,99	6,99	reichelt.de	verified 10.09.2026
Hardware	Hex socket screw / nut / washer assortment, 520 pcs, M3-M6	1	18,70	18,70	roboter-bausatz.de	verified 10.09.2026
Hardware	ruthex M3x5.7 heat-set threaded inserts, 100 pcs	1	8,99	8,99	reichelt.de	verified 10.09.2026

Totals for this route: parts 758,70 €, shipping 37,60 €, delivered 796,30 €.

Shipping

Supplier	Order value €	Shipping €	Rule
dold-mechatronik.de	213,79	12,90	DPD up to 1.5 m, <=10 kg - required for the 1.3 m profiles
roboter-bausatz.de	283,79	0,00	Free from 99 € gross - reached
berrybase.de	89,40	4,95	DHL 4,95 € - basket now under the 150 € free threshold since the Pi 5 came out
reichelt.de	43,23	5,95	DHL <=10 kg
oyostepper.de	64,76	6,90	Estimate - no published rate
druckluft-fachhandel.de	63,73	6,90	Estimate

Notes

• Six suppliers, every part of the BOM covered, six parcels instead of twelve. The delivered total is about 100 € below sheet 1, but read that carefully: consolidating actually COSTS about 28 € on parts (see note 4) and saves about 30 € on shipping - roughly a wash. The 100 € gap comes from the two substitutions in note 3, mainly the 6,65 € servo standing in for the 123,49 € linear actuator. Those substitutions are available on sheet 1 too if you want them there.
• YOUR QUESTION - can it be done with 5? Not for the complete BOM. The one line no German general-purpose shop carries is the NEMA17 with a 5:1 planetary gearbox: roboter-bausatz has none (discontinued), Dold lists only 10:1, BerryBase and Reichelt none at all. Drop to 5 suppliers by either (a) buying 10:1 geared motors from Dold instead of 5:1 - fine for the wrist and the carousel index, both slow axes - or (b) buying the two geared motors from a 6th shop and accepting it. Everything else on this sheet already consolidates.
• Substitutions made to reduce supplier count, each flagged in the Notes column: MG996R servo + printed pusher rod instead of the 123 € Actuonix linear actuator; 50 cm Raspberry Pi camera ribbon instead of the Arducam CSI-HDMI extender pair; TPU-printed cup lip on a bought nipple instead of the 21 € Balgensauger; Dold’s energy chain instead of cnc-zubehoer’s.
• Extra cost of consolidating, line by line: MGN12 rail +9,60 €, camera modules +6,00 €, energy chain +12,00 €, T-nuts kept at RB to avoid +28 € at Dold. Total parts premium about 28 €, shipping saving about 30 €.
• Dold prices its cut profiles as €/m plus a 0,50 € cutting fee per piece - that is what the unit prices here reflect. Quantity discount of 4.75% applies from 2 pieces of the same configured 20x40 profile.
• Plywood, Baumarkt items and filament are not included, same as sheet 1.
• ALREADY OWNED, shown as 0,00 € rows: 2x Raspberry Pi 4B rev 1.1 / 2 GB (one is the cold spare), their 32 GB cards and 15 W supplies, an external USB 3.0 SSD, a self-powered USB 3.0 hub, and the Trust HD1080p webcam as the wrist camera. Together that removes roughly 185 to 195 € depending on the sheet. Also already on hand and never in these lists: the Omnitronic DD 3120, the Focusrite Scarlett, the Conrad 393905 relay card and the 3D printer.
• Three Pi 4 gotchas worth reading before you wire anything: rev 1.1 boards refuse e-marked USB-C cables (use the official supply); rev 1.1 puts the SD-card voltage regulator on the underside next to the slot where it can be knocked off, so set the card up once and leave it; and the enclosed electronics box needs a heatsink and a fan on a Pi 4 under sustained vision load.
• Put the Scarlett, the SSD, the webcam and the relay card on the powered hub, not on the Pi. The Pi 4 budgets roughly 1.2 A across all four ports and this machine runs unattended for a weekend - a brown-out mid-side is a lost recording. Pin every device with a udev rule so /dev/video* and the ALSA card index do not shuffle across reboots.

Donor printer route

A used 3D printer supplies the motion hardware; a Pi Pico + 1 TMC2209 replaces the Octopus. Prices incl. 19% VAT, verified 10 September 2026.

Group	Part	Qty	Unit €	Line €	Supplier	Note
Donor	Used 3D printer (Creality Ender 3 / CR-10 / Ender 5) as donor	1	75,00	75,00	eBay Kleinanzeigen / used	ESTIMATE - not verified; local pickup. Supplies 4-5 NEMA17, 24 V PSU, GT2 belt+pulleys+idlers, wheels, carriage plates, end-stops, board
Frame	Aluprofil 20x40 V-Typ Nut 6, cut 1300 mm (X beams - too long for any donor)	2	18,70	37,40	dold-mechatronik.de	verified 10.09.2026
Frame	Aluprofil 20x40 V-Typ Nut 6, cut 800 mm (cross beam)	1	11,70	11,70	dold-mechatronik.de	verified 10.09.2026; an Ender 5 Plus donor may cover this
Frame	Aluprofil 20x20 V-Typ Nut 6, cut 800 mm (end tie)	1	6,90	6,90	dold-mechatronik.de	verified 10.09.2026
Frame	Innenwinkel Stahl verzinkt 20 Nut 6, incl. 2x M4x6	20	1,18	23,60	dold-mechatronik.de	verified 10.09.2026
Frame	Nutenstein M5 Nut 6, slide-in	50	0,25	12,50	roboter-bausatz.de	verified 10.09.2026
Frame	20x M5 Hammerkopfschraube Nut 6, 10 mm (5 packs)	5	1,49	7,45	roboter-bausatz.de	verified 10.09.2026
Linear	V-wheels, eccentric spacers, carriage plates	—	—	0,00	from donor printer	FROM DONOR - an Ender 3 carries 9-12 Delrin wheels with eccentrics
Linear	Linearfuehrung MGN12R, 800 mm (Z column - no donor has this)	1	37,60	37,60	dold-mechatronik.de	verified 10.09.2026
Linear	Linearwagen MGN12H	1	13,00	13,00	dold-mechatronik.de	verified 10.09.2026
Motion	NEMA17 steppers X, Y, Z	—	—	0,00	from donor printer	FROM DONOR - 4 to 5 motors, saves 46,62 €
Motion	NEMA17 planetary gearbox 5:1, 44 Ncm (wrist, carousel)	2	32,38	64,76	oyostepper.de	verified 10.09.2026; no donor has geared motors
Motion	GT2 belt, 20T pulleys, idlers	—	—	0,00	from donor printer	FROM DONOR - saves about 30 €. Buy a 5 m belt if the donor’s is worn
Motion	Smooth Idler Spannrolle Kit (belt tensioner)	2	5,15	10,30	roboter-bausatz.de	verified 10.09.2026; donor tensioners rarely fit a new frame
Motion	Trapezgewindespindel T8 800x8 mm with brass nut	1	15,29	15,29	roboter-bausatz.de	verified 10.09.2026; donor screws are 36-40 cm, too short for the 80 cm Z
Motion	Shaft coupling 5 mm -> 8 mm (rigid)	1	1,99	1,99	roboter-bausatz.de	verified 10.09.2026; donor may supply one
Motion	KFL08 flange bearing block, 2 pcs	1	2,87	2,87	roboter-bausatz.de	verified 10.09.2026
Servos	MG996R digital servo, metal gears (cue lever)	1	6,65	6,65	roboter-bausatz.de	verified 10.09.2026
Controller	Donor 32-bit board (Creality 4.2.x) running Klipper - 4 axes	—	—	0,00	from donor printer	FROM DONOR - replaces the 65,95 € Octopus
Controller	Raspberry Pi Pico RP2040 (2nd MCU: carousel stepper + remaining I/O)	1	4,10	4,10	berrybase.de	verified 10.09.2026; 100+ in stock
Controller	BIGTREETECH TMC2209 V1.3 UART, single (carousel stepper)	1	5,69	5,69	roboter-bausatz.de	verified 10.09.2026; donor board covers the other 4 axes
Power	24 V power supply	—	—	0,00	from donor printer	FROM DONOR - Ender 3 has 24 V / 350 W, saves 18,50 €
Power	Mini step-down module 3 A -> 5 V	1	1,29	1,29	roboter-bausatz.de	verified 10.09.2026
Computer	Raspberry Pi 4 Model B rev 1.1, 2 GB RAM (2 on hand; 2nd = cold spare)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - saves 118,50 €. REV 1.1: refuses e-marked USB-C cables, use the official PSU. Verify: cat /proc/cpuinfo -> a03111
Computer	Official Raspberry Pi 15W USB-C PSU (Pi 4 takes 15 W, not 27 W)	—	—	0,00	ALREADY OWNED	ALREADY OWNED presumed. Do NOT run the Pi off the servo 5 V buck - an MG996R stalls at ~2.5 A
Computer	microSD card 32 GB (OS, Klipper, orchestrator, logs only)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - nothing the machine records goes on it
Computer	External USB 3.0 SSD for the WAV files, >=500 GB	—	—	0,00	ALREADY OWNED	ALREADY OWNED / to hand. ~860 MB per side, ~40 GB per magazine. SSD not HDD - spin-up current and vibration
Computer	Self-powered USB 3.0 hub (Scarlett + SSD + webcam + relay card)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - Pi 4 gives only ~1.2 A across all ports. Pin device names with udev rules
Cameras	Raspberry Pi Camera Module 3, 12 MP (deck camera)	1	28,90	28,90	berrybase.de	verified 10.09.2026; only one needed - the Pi 4B has a single CSI port
Cameras	Raspberry Pi camera cable Standard-Mini, 500 mm (deck camera)	1	3,50	3,50	berrybase.de	verified 10.09.2026; the 200 mm cable in the box may already reach
Cameras	Trust HD1080p USB webcam (wrist camera)	—	—	0,00	ALREADY OWNED	ALREADY OWNED - one CSI port means the wrist camera goes USB. Lock focus/exposure/gain/WB via v4l2-ctl
Vacuum	Mikro Membran-Vakuumpumpe 12 V (YW11-DC12)	1	11,40	11,40	berrybase.de	verified 10.09.2026; out of stock
Vacuum	2/2-way solenoid valve G 1/8 NC, FKM, 12 V, direct acting	1	42,44	42,44	druckluft-fachhandel.de	verified 10.09.2026
Vacuum	Adafruit MPRLS pressure sensor breakout 0-25 PSI	1	30,90	30,90	berrybase.de	verified 10.09.2026; out of stock
Vacuum	Saugeranschlussnippel NW 2.40 mm, G 1/8 AG (TPU cup lip printed)	1	5,00	5,00	druckluft-fachhandel.de	ESTIMATE - not verified
Vacuum	Polyurethane tube 6 x 4 mm, natural, per metre	5	1,05	5,25	druckluft-fachhandel.de	verified 10.09.2026
Vacuum	Straight push-in fitting G 1/8 - 6 mm, IQS	8	1,38	11,04	druckluft-fachhandel.de	verified 10.09.2026
Sensing	End-stop switches	—	—	0,00	from donor printer	FROM DONOR - 3 to 4 mechanical end-stops with cables
Sensing	Hall magnetic sensor module KY-003 (A3144)	1	0,90	0,90	berrybase.de	verified 10.09.2026
Sensing	KY-010 photo interrupter / slot optical sensor module	1	1,25	1,25	roboter-bausatz.de	verified 10.09.2026
Deck I/O	NFKE MG 63 audio cable, 6.3 mm mono jack, 1.8 m	1	1,56	1,56	reichelt.de	verified 10.09.2026
Light	LED strip warm white, 12 V, 5 m	1	5,85	5,85	reichelt.de	verified 10.09.2026
Light	INFINEON IRLZ44N logic-level MOSFET, TO-220	2	0,67	1,34	reichelt.de	verified 10.09.2026
Carousel	Miniature ball bearing 608-ZZ 8x22x7 mm	10	0,79	7,90	dold-mechatronik.de	verified 10.09.2026
Carousel	Deep groove ball bearing 6005-2RS 25x47x12 mm	1	1,79	1,79	dold-mechatronik.de	verified 10.09.2026
Carousel	Precision shaft 25 mm h6, hardened, cut 100 mm	1	3,29	3,29	dold-mechatronik.de	verified 10.09.2026
Cabling	Energiekette CK10, 20 mm wide, 1000 mm	3	9,57	28,71	dold-mechatronik.de	verified 10.09.2026
Cabling	Energiekette CK10 connection elements, 1 pair	2	2,50	5,00	dold-mechatronik.de	verified 10.09.2026
Cabling	610-piece Dupont crimp connector set in box	1	9,90	9,90	berrybase.de	verified 10.09.2026
Cabling	200-piece jumper wire connector kit, JST-SM / Dupont	1	3,90	3,90	berrybase.de	verified 10.09.2026
Cabling	Silicone wire 20 AWG, red + black, per metre	10	1,55	15,50	roboter-bausatz.de	verified 10.09.2026
Cabling	Nylon braided sleeving 15 mm, per metre	5	0,32	1,60	roboter-bausatz.de	verified 10.09.2026
Cabling	Heat shrink assortment Delock 86278, 230 pcs	1	6,99	6,99	reichelt.de	verified 10.09.2026
Hardware	Hex socket screw / nut / washer assortment, 520 pcs, M3-M6	1	18,70	18,70	roboter-bausatz.de	verified 10.09.2026
Hardware	ruthex M3x5.7 heat-set threaded inserts, 100 pcs	1	8,99	8,99	reichelt.de	verified 10.09.2026

Totals for this route: parts 599,69 €, shipping 42,05 €, delivered 641,74 €.

Shipping

Supplier	Order value €	Shipping €	Rule
eBay Kleinanzeigen / used	75,00	0,00	Local pickup - a donor printer is not worth shipping
dold-mechatronik.de	176,89	12,90	DPD up to 1.5 m, <=10 kg
roboter-bausatz.de	101,08	4,45	DHL 4,45 €; free from 99 € - NOT reached on this basket
berrybase.de	93,50	4,95	DHL 4,95 € - basket now under the 150 € free threshold since the Pi 5 came out
reichelt.de	24,73	5,95	DHL <=10 kg
oyostepper.de	64,76	6,90	Estimate
druckluft-fachhandel.de	63,73	6,90	Estimate

Notes

• Same six shops as sheet 2 plus the donor printer itself. Rows with quantity 0 and supplier ‘donor’ are the parts the used printer supplies - they carry 0,00 € so the total stays honest.
• What the donor covers: 4-5 NEMA17 steppers, the 24 V power supply, GT2 belt with pulleys and idlers, Delrin V-wheels with eccentrics and carriage plates, mechanical end-stops, the 32-bit board, and a bag of M3/M4 fasteners. Roughly 175 € of parts for a 50-100 € machine.
• Controller: the donor’s Creality 4.2.x board runs the four gantry axes under Klipper. A Raspberry Pi Pico (4,10 €) plus one TMC2209 (5,69 €) acts as a second MCU for the carousel stepper and the remaining I/O. That replaces the Octopus and its five drivers - 91,70 € saved for 9,79 €.
• What the donor cannot cover, whatever you buy: the 2x 1.3 m V-slot beams, the 800 mm Z rail and lead screw, the two geared steppers, and everything electronic on the Raspberry Pi side.
• Donor ranking from the BOM: CR-10 / CR-10S (especially the S5) is best - longest extrusions and lead screws. Ender 3 / 3 Pro / V2 is the cheapest and most plentiful but its profiles are short. Ender 5 Plus gives two lead screws and a 350 W supply. Anycubic and Artillery: take for motors and PSU only.
• Buy the donor FIRST. What it turns out to contain decides several lines above, and a worn belt or a seized wheel is worth replacing rather than fitting.
• Check the donor’s board revision before counting on it: only 32-bit Creality 4.2.2 / 4.2.7 boards run Klipper. An 8-bit 1.1.4 board does not, and then you are back to the Octopus. The TMC drivers on 4.2.x boards are soldered down, so they cannot be harvested for anything else.
• ALREADY OWNED, shown as 0,00 € rows: 2x Raspberry Pi 4B rev 1.1 / 2 GB (one is the cold spare), their 32 GB cards and 15 W supplies, an external USB 3.0 SSD, a self-powered USB 3.0 hub, and the Trust HD1080p webcam as the wrist camera. Together that removes roughly 185 to 195 € depending on the sheet. Also already on hand and never in these lists: the Omnitronic DD 3120, the Focusrite Scarlett, the Conrad 393905 relay card and the 3D printer.
• Three Pi 4 gotchas worth reading before you wire anything: rev 1.1 boards refuse e-marked USB-C cables (use the official supply); rev 1.1 puts the SD-card voltage regulator on the underside next to the slot where it can be knocked off, so set the card up once and leave it; and the enclosed electronics box needs a heatsink and a fan on a Pi 4 under sustained vision load.
• Put the Scarlett, the SSD, the webcam and the relay card on the powered hub, not on the Pi. The Pi 4 budgets roughly 1.2 A across all four ports and this machine runs unattended for a weekend - a brown-out mid-side is a lost recording. Pin every device with a udev rule so /dev/video* and the ALSA card index do not shuffle across reboots.

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