Robot Brace

[Don52]

While measuring the deflection of the waist axis of a robot we needed a brace to keep the brake from the shoulder axis from back driving, which would cause the arm to drop, when we hung weights on the elbow of the robot. I had to replace the bearings that guided the blade on my swivel mast saw. The cooling fluid got past the shields on the bearings and locked them up . Each guide uses 7 bearings for a total of 14. I was able to use roller blade bearings, so I could purchase 50 bearings for $45. The bearings that I purchased were sealed instead of shielded so it should help to keep the coolant out of the bearings.

Pictures:
1. Chamfering angle for bevel groove weld
2. New bearings on swivel mast saw
3. Parts all cut and ready for welding
4. Welding top of angle
5. Welding bottom of angle

Don

[Don52]

I chose to pre-drill the holes on the plate and angle iron, before I welded the brace together, because it was easier to hold the parts for machining. I was a little concerned that the holes might not line up, once I put the robot in the zero position, but the holes lined up fine.

Pictures:
6. Welding side of plate
7. Welding bottom of plate
8. Welding top of plate
9. Brace all welded
10. Brace in place

Don