Linear slider attachment for BCN3D MOVEO robot arm

These parts allow you to add a slide axis to your BCN3D MOVEO Robot arm. No modifications are required to the original. 

Updates 12.02.25

On the rotate mount, repositioned idler tensioner for better effectiveness. 

Updated slider NEMA mount to incorporated bolt M4 bolt to base (base and arm2 updated with bolt hole)

Added T5 belt end clamps for slide axis

Added modified bearing covers for the 3 joints that allow for the attachment of zip ties

Known issues:

On slide axis, the inboard belt idler touches the arm assembly, inhibiting free rotation.

Instructions

Start by printing the Base this will attach to the BCN3D base with 4xM4x20mm bolts and hex nuts. 

Next print 2 of each of the arms. these attach with 14xM5x20-30mm bolts, they screw directly into the printed part, no nuts or inserts required. Leave bolt holes open on the top for the NEMA17 and Cable chain mounts. 

Next print the NEMA and cable chain mounts, the NEMA mounts should be attached with 4xM5x40mm bolts, shorter may be used too. The cable chain mount can be attached with 3xM5x30mm bolts. 

Finally print the remaining parts, you will need 2x M3 spacer and 2x Belt idler pulley 623zz.

For the Rotate axis, press fit 2x625zz bearing into each end of the idler tensioner part, use an M5x30-40mm bolt from the underside of the NEMA mount and then place the idle tensioner on the bolt. Use the spacers as required to increase the tension on the belt. Mount the motor with 4xM3x8-10mm bolts. 

For the slide axis, mount the motor first with the lower 2 screwholes with 2xM3x8-10mm bolts. Now insert 2x into each idler pulley. Using 4xM3x40mm bolts, attach the end plate with both the spacers and idler pulleys between end plate and motor mount. Ensure idler pulley can rotate freely.  (Note: The orientation of the motor has changed since I took the pictures, the drive shaft is now inboard )

Note: Nema motors will need appropriate drive pulleys attached, preferably before assembling 3D printed parts. 

I recommend printing with extra perimeters for added strength and rigidity. 

I printed in PLA, mostly with this ELEGOO filament to reduce costs. 

Requires:

 this linear rail, SBR20x1m, or adapt to your own. 

Build instructions and pictures soon!

BOM for complete build. 

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