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Power table feed stops under load

[3]
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AGCB97

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#1
I have a T-ONE power table feed (150 in lbs) on the x axis of my Bridgeport that has been working good for several years. Lately it stops when under load in one direction. Immediately goes the other direction if switched. Today I found that if I help the travel by pulling on it, it keeps going. I'm wondering if there is some type of overload cut out or something that might cause this. Maybe part of circuit board. It does not pop the circuit breaker.
Thanks
Aaron
 

dlane

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#2
Might look at the brushes in the motor,
 

RJSakowski

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#3
It sounds like increased friction. Check the thrust bearing, table ways, gib adjustment. My old mill/drill requires increased torque when infeeding as the thrust bearing race has worn to the extent that the dial rubs on the bearing housing. On the outfeed, it pulls away providing clearance and reruced torque. Poorly lubricated ways and/or a tight gib adds to the friction which increases the amount of torque required.
 
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