Concept One Robot: Rotation
Reduction Gear Spindle Shaft Correction Kit
Application:
Concept One robot, all
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M02-100665-00
(Kit, shaft, rotation reduction)
Includes MILLC shaft, matched
wave spring, shielded bearings (2)
and precision ground spacer
Exceeds OEM specification
Ψ What is it?
It supports the rotation reduction gear drive
assembly, transferring power from the stepper motor to the rotation shaft
Ψ What's wrong with it?
Incorrect length, OEM spindle shoulder never
actually contacts spacer/gear. This prevents accurate or repeatable preload on
thrust bearings. Preload is determined solely by the tightness the user places
on the fastener.
Narrow shoulder does not precisely locate
reduction gear
Ψ Result
Premature bearing failure
Erratic rotation, placement error
Intermittent Lost steps error
Ψ
How should it work?
Spindle shaft shoulder contacts spacer/gear
when fastener is tight, precisely locating the gear and compressing the wave
spring
The wave spring is designed to be compressed
exactly .015 to attain the correct bearing preload of 12 lbs
Ψ Corrective action
New spindle with corrected geometry
Larger shoulder for precise gear location and
planarity
Increased slot depth for easier installation
Spindle length now compresses wave spring .015
to precisely preload thrust bearings to Mfg spec of 12 lbs.
Preload is no longer effected by fastener
tightness