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Bill of Materials // Self Sourcing Guide

This page is dedicated to those who wish to source their own parts to build their Positron V3 from scratch.

Please note that prices are likely to change over time, and that this BOM will not always be accurate.

Prices are likely to differ from what is written, and is rounded to the nearest whole USD. Taxes & Shipping are not included.

This Page is still being established and will likely change drastically over time. Information here is not complete.

Electronics

Primary Sources
Part ID Name Purpose Required Quantity Primary Link / Secondary Link
Price
Notes
CTRL1 SKR PICO Control Board 1

Amazon /

Biqu

$30
CBRD1 RPI RPI Zero 2 W 1 Amazon  / RPILocator $110 / $20
Other Micro PCs have worked
MTRXY Nema 17 20mm X/Y Motor 2 AmazonAliExpress $12 / $8

17HS08-1004S

MTRZ Nema 17 28mm Z Motor 1 Amazon  / AliExpress $22 / $14
14HM11-0404S
MTRE Nema 14 Round E Motor 1 Amazon / AliExpress $22 / $14
36STH17-1004AHG
SCRN1 3.5in TFT GPIO RPI
Touch Screen 1 Amazon  / AliExpress $23 / $19
480x320 / 320x240, 3.5 in  / 2.8 in
SCRNS IDC 10 pin socket 2.54
Touch Screen Socket 1 Amazon / AliExpress $6 / $1
2x5 10 Pin
SCRNC IDC 10 pin Cable 2.54 Touch Screen Cable 1 Amazon / AliExpress $8 / $1
2x5 10 Pin
HTRC 50W Heater Cartridge Heater Cartridge 1 Amazon / AliExpress $10  / $1
24V 50W 1M
TMPSHE NTC 3950K Glass bead Temp Sensor for Hotend 1 Amazon / AliExpress $12 / $1
XH 2.54 connector
BEDPRBE IR bed Probe IR Probe Differential IR Height Sensor 1 Amazon / AliExpress $20 / $16
Muon's probe is reccomended
MAGSAFE Magnetic connector 6pin Bed mounting 1 Amazon / AliExpress $23 / $3
6pin Straight
FAN2510 2510mm Fan 24V Cooling 3 Amazon / AliExpress $20 / $9
XH 2.54 connector
DCJACK
5.5x2.1 DC Jack 8A
Power Input 1 Amazon / AliExpress $8 / $3
Use 5.5x2.5 if your power supply is such
PSU1 24V 8 or 10A power supply Power Supply 1 Amazon / AliExpress $32 / $39
19V laptop power supply also works if you sacrifice 25% performance
PSwitch Rocker Switch 10A
Power Switch 1 Amazon / AliExpress $7 / $1
 2/3 pin
Verified Kits
Verified Motor Kits

With these kits, all required motors are included.

Manufacturer Retailer Item Name Price
LDO West3D LDO Motor Kit $60
LDO Fabreeko LDO Motor Kit $60
Verified Build Plate Kits

With these kits, all required parts for the print bed are included.

Connectors to the Z Gantry may not be included.

Manufacturer Retailer Item Name Price
Muon3D Muon3D Positron V3 - Transparent Heated Bed $50

Motion

Primary Sources
Part ID Name Purpose Required Quantity Primary Link / Secondary Link
Price Notes
XRAIL1 MGN 9C 250mm
X Axis Rail 1 Amazon / Aliexpress $21 / $15

227mm Needed, Low Preload

YRAIL1 MGN 12C 300mm Y Axis Rail 1 Amazon / Aliexpress $19 / $15
235mm Needed, Low Preload
ZRAIL1 MGW 9C 300mm Z Axis Rail 1 RobotDigg $30 257mm Needed, Medium to High Preload
IDLERZ GT2 16T Smooth Idler
Z Axis Assembly 4 Amazon / Aliexpress $12 / $3
16T Bore 3mm
PULLEYZ1 GT2 Low profile Pulley 20T Z Axis Assembly 1 Aliexpress $1 20T Bore 5mm
PULLEYZ2 48T GT2 Pulley 5mm Bore Z axis drive train 1 Amazon $13
20-48T-5B-6 
PULLEYZ3 16T GT2 Pulley 5mm Bore Z axis drive train 1 Amazon / Aliexpress $9 / $1

16T-5B-Silver

16T-B5-W6

ZBELT1 GT2 6mm Timing Belt
Z axis drive train 1 Amazon / Aliexpress  $9 / $1
750mm Needed
ZBELT2 GT2 6mm belt loop 130mm Z axis drive train 1 Amazon / Aliexpress $12 / $1

130-2GT-6 mm

ZSHAFT1 Shaft 5mm x 150mm Z axis drive train 1 Amazon / Aliexpress $6 / $2
Go for 200mm to be safe
ZBEARING1 MF115ZZ Flanged Ball Bearing
Z axis drive train 2 Amazon $8 5  x 11 x 4mm
ZGEAR1 BMG drive gear kit 50T gear with dual gear filament drive 1 Amazon $20 DIY extruder kit
SMESHBEARING1 623ZZ Ball Bearing  Syncromesh Pully Bearings
12 Amazon / Aliexpress $14 / 7$
3x10x4mm
SMESH1 Syncromesh Cable 3.81P Syncromesh 1.66m Actual SDP-SI ~$7

A 6J 9MAS0805 Historical Quote for 1000m is $3.4/m

SMESHPULLEY1 Syncromesh Pulley 3.81P 15T Syncromesh Pulley 2 SDP-SI ~$22 A 6P 9M0801505 Historical Quote for 1000 pcs is $4.79/pcs
Verified Kits
Verified Motor Kits

With these kits, all required motors are included.

Fasteners May Not be Included

Manufacturer Retailer Item Name Price
LDO West3D LDO Motor Kit $60
LDO Fabreeko LDO Motor Kit $60
Verified Rail Kits

With these kits, all required linear rails are included.

Fasteners May Not be Included

Manufacturer Retailer Item Name Price
West3D West3D Positron Linear Rail Kit (Motion) 3D Printer $70
Fabreeko Fabreeko Positron black steel pre modified rails by HoneyBadger $75

Other Mechanical

Primary Sources

This section was copied from the original BOM and parts require verification.

Name Purpose Required Quantity Primary Link / Secondary Link Price
Notes
Mk8 heatsink typically on ender 3 extruder 1 Spool3D $9

Ender 3 heatbreak
1 Amazon / Aliexpress UNA / $3

E3D V6 0.4 nozzle
1 Amazon / Aliexpress $7

Capricorn bowden tubing PTFE tube 1 Amazon / Aliexpress $11 / $5

PC4-M10 PTFT push connector

2 Amazon / Aliexpress $8 / $1

m3x10mm Spacer Aluminum Outer dia is 8mm 8 Amazon $11
Machine down the tube
Rubber feet 4mm thick Bottom feet 5 Amazon / Aliexpress $6 / $3

200x200x3mm Borosilicate glass headed bed body 1 Amazon / Aliexpress $16 / $15
Muion's is reccomended
0.25in cable sleeve need at least 1m 1 Amazon / Aliexpress $8 / $3

M4 ring terminal 22-16 AWG Crimping syncromesh cable 2 Amazon / Aliexpress $8 / $2

M4x12 Dowel pin Bed location 10-15mm acceptable 2 Amazon / Aliexpress $8 / $3

M3 nylon spacer assortment

x Amazon / Aliexpress $13 / $10

Zip ties 4in/100mm Cable management 10-20 Amazon / Aliexpress $5 / $2

M3x15 Aluminum Spacer Motor Mounting 4
Same as m3x10mm Spacer Aluminum

Machine down the tube
Verified Kits
Verified Build Plate Kits

With these kits, all required parts for the print bed are included.

Connectors to the Z Gantry may not be included.

Manufacturer Retailer Item Name Price
Muon3D Muon3D Positron V3 - Transparent Heated Bed $50

Fasteners

Primary Sources

This section was copied from the original BOM and parts require verification.

Name Purpose Required Quantity Primary Link / Secondary Link Price Notes
M6x14 thumbscrew 19mm head dia For Z axis bed arm mounting 1 Amazon / Aliexpress $14 / $2
if you get m6x15 please shave of a mm
M5 washer Z axis holder 2 Amazon / Aliexpress $7 / $1

M6 nut Thumbscrew stabilze 2 Amazon / Aliexpress $7 / $1

M4 nut Z axis mounts 8 Amazon / Aliexpress $7 / $1

M4x10 Buttonhead
12 Amazon / Aliexpress $10 / $2

M4x8 buttonhead
2 Amazon / Aliexpress $8 / $1

M3x6 buttonhead Find a M3 buttonhead kit 11


M3x20 Buttonhead Find a M3 buttonhead kit 2


M3x14 Buttonhead Find a M3 buttonhead kit 2 Amazon / Aliexpress $18 / $10

M3x10 Buttonhead Find a M3 buttonhead kit 15


M3x8 Buttonhead Find a M3 buttonhead kit 12


M3x25 buttonhead Find a M3 buttonhead kit 4


M3x12 Buttonhead Find a M3 buttonhead kit 5


M3 nut 2.4mm Find a M3 buttonhead kit 35


M3 Washer Find a M3 buttonhead kit 12


 ==========   ==========   ==========   =====   ==========  ==========
M3x14 Waferhead Low Wafer Head Machine Screws Flat Head Screw 17 Ebay $2
M3x12 Waferhead Low Wafer Head Machine Screws Flat Head Screw 2 Ebay $2
  ==========   ==========   ==========  =====   ==========  ==========
M3x12 Flathead Find a M3 Flathead kit 8


M3x18 flathead Find a M3 Flathead kit 8


M3x10 Flathead Find a M3 Flathead kit 1 Amazon / Aliexpress $13 / $5

M3x6 Flathead Find a M3 Flathead kit 2


M3x23 Flathead Can be cut down from M3x25 2


  ==========   ==========   ==========  =====   ==========  ==========
M3 Nylock Nut Optional? with thread locker 2 Amazon / Aliexpress $7 / $2

M2.5x8 Flat head
2 Amazon / Aliexpress $9 / $3

M2x10 Buttonhead For Screen 4 Amazon / Aliexpress UNA / $2

  ==========   ==========   ==========  =====   ==========  ==========
M3x8 Sockethed Find a M3 Sockethead kit 5


M3x30 Sockethead Find a M3 Sockethead kit 2 Amazon / Aliexpress $22 / $8

M3x20 Sockethead Find a M3 Sockethead kit 7


HNTT5-3 T nut From MISUMI for Z axis mounting 5 Misumi-EC $3

M3x6 threaded insert Heat press plastic insert 5 Amazon / Aliexpress $12 / $3

Verified Kits
Verified Fastener

These Fastener Kits should contain all the Fasteners you need, but be sure to Double Check!

Manufacturer Retailer Item Name Price
West3D West3D Best Damn Fastener (BDF) Positron Fastener Kit $25

Raw Materials / Stock

Primary Sources

This section was copied from the original BOM and parts require verification.

Name Purpose Required Quantity Primary Link / Secondary Link
Price Notes
200x200x4mm AL plate 6061, 8x8in also works, thickness can be 0.16in 1 Amazon / Aliexpress $22 / $17
For base plate and z axis brackets
100x100x2mm AL plate 6061 T6 1 Amazon / Aliexpress $17 / $5
For Hotend cover and extruder mounting
120x180x3mm AL Plate 6061 T6 1 Amazon $17
For Motor Mounts
220x220x10mm AL plate 3/8in also works 1 Amazon $31
For bed arm, bed arm is stackable
30x30x5mm AL angle 90 degree only 32mm needed 1 Misumi-EC $10
3010 x250mm AL extrusion Special, only MISUMI has it. Z axis 1 Misumi-EC $3
HFSQN4-1030-250
3mm Black acrylic sheet 200x300 sheet Sand blasted finish 1 Amazon $17
0.125in also works
3mm Clear Acrylic sheet 200x60mm Sheet. Sand blasted 1 Amazon $14
0.125in also works
Aluinum Block 6061 MISC macheing 40x40x70 bar 1 Amazon $23
8mm brass rod Hotend insert 1 Amazon / Aliexpress $9 / $2

3D Printed Parts

List of Parts

This section was copied from the original BOM, no purchase sources currently available.

Name Material Quantity
3D printed toolhead interconnect ABS. Prefer SLS nylon 1
Belt and Connector Holder ABS 1
Edge Raised clamp(Mirror) PLA/ABS/PETG 1
Edge Raised clamp PLA/ABS/PETG 1
End Holder Block ABS/PETG 1
EXP Connector Holder ABS/PETG 1
Extruder Base ABS 1
Extruder Cap ABS 1
Extruder Mid body ABS 1
Extruder Silder Arm ABS 1
LED Holder Body PLA/ABS/PETG 1
Light Clamp Holder PLA/ABS/PETG 1
M4 spacer 4.1mmx6 PLA/ABS/PETG 1
Pulley Holder Bottom ABS/PETG 1
Pulley Holder Top ABS/PETG 1
Screen holder Base PLA/ABS/PETG 1
Screen Holder Lid PLA/ABS/PETG 1
Side Panel Left PLA/ABS/PETG 1
Side Panel Right PLA/ABS/PETG 1
Thumbscrew body 3D printed PLA/ABS/PETG 1
Top Panel Spacers PLA/ABS/PETG 1
Z axis top stopper PLA/ABS/PETG 1
======================== ======================= ========================
Small Synchrmesh Idler.stl Prefer Lathed out of Delrin 10
19.5mm pDia Synchromesh Prefer Lathed out of Delrin 2
======================== ======================= ========================
======================== ======================== ========================
Silicone Mold Bottom (1) PETG, For hotend Silicone Mold 1
Silicone Mold Bottom PETG, For hotend Silicone Mold 1
Silicone Mold Top PETG, For hotend Silicone Mold 1
======================== ======================== ========================
======================== ======================== ========================
JLCPCB Customn PCB From Github 1