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PP-MP0279: Counter sink diameter needs to be big enough so M2x6 flat screw lays flushed
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Description

The drawing calls out for a 4mm counter sink and the alpha parts 3.5mm counter sink.

Event Timeline

oliver created this task.Tue, Aug 6, 2:26 PM
tutley added a subscriber: tutley.Wed, Aug 7, 7:09 AM

It is critical that the countersinks on the lower bearing mount side of the motor mount are countersunk to a 4mm diameter. If this is not the case, the M2x6mm FHCS will not sit flush. This causes the motor to not lay flat when mounted and deflects the motor shaft/worm gear into the worm wheel causing binding and the Nema 11 does not spin freely.

This can easily be corrected by using a 4.5mm drill bit with a pointed tip and removing a bit of material in the countersink. I showed @oliver how to correct this on the syringe pump we assembled yesterday afternoon

AOJAS renamed this task from PP-MP0279: Counter sink daiameter needs to be big enough so M2x6 flat screw lays flushed to PP-MP0279: Counter sink diameter needs to be big enough so M2x6 flat screw lays flushed.Wed, Aug 7, 7:15 AM

Noticed an issue with this on the first article, I'll have it on the report.