For our parts we found that we needed to add .3mm to all pockets and holes to go from Pollen's models to FDM

With the SLA printing on our Form2 we found it may have actually shrunk slightly, although the real issue is that there are several places where proper tolerancing by Pollen never happened. For example there is no tolerance in the magnet pockets for the antennas. Generally elsewhere the tolerance is .1mm, and while that may work on SLS, most of our SLA and FDM parts needed modification and tolerances added.

Here is a video by @Dan O'Mara about his modification to parts to go from the Pollen designed Reachy models to models ready to print on FDM consumer 3d printers.

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/55a06b82-fc0f-46a6-bb77-775e1403d4f1/2020-12-09_11-53-49.mp4

Tolerance for FDM Add .3mm

Shoulder joint the mounting screws to the Servo Horn: M2.5x6

• It appears like Pollen only uses one washer on the needle bearing.
• If we use both washers, we need the M2.5x10 screw to mount the piece to the servo horn.
• We don't have enough screws in this size. This piece needs to be altered so that the M2.5x6 screws work.
• Each part mounting through a needle bearing to a servo horn will have this same issue and will likely need the same modification
• Each part mounting to a servo horn in general should be checked to see if modification here is needed.

No servo horn in this shot. You can add 2.5 mm to the bottom and drop the screw head shelf 4mm

shoulder v2.step