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TB040 Rev1 Pulley Alignment
Overview
The purpose of this document is to describe the effects when a pulley on the motor does not line up with the
pulley on the spindle or ball screw etc
Problem
This diagram shows the motor being mounted 0 250" lower than the spindle pulley This will cause excessive
noise and create heat build up on the spindle pulley and belt The belt would surely become frayed and in time
would eventually be destroyed See the following diagram of a spindle motor and pulley setup
Solution
Bring the motor pulley into alignment One recommendation is removing the pulley from the motor and
machining 0 250" from the backside of the pulley You will also have to make a new retainer to hold the pulley
on
Pulleys on the motor and spindle that are of a poor quality cast and have numerous voids which also decrease
belt life Be sure the belt is the correct multi groove type
Document History
Rev1 Created on 1998 03 09
by #001