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When your motor stops can you turn it by hand or can you restart it again?
I really think you should check the I/C pins for corrosion ( inspect with an eye loope) as the last thing my mill did...

When your motor stops can you turn it by hand or can you restart it again?
I really think you should check the I/C pins for corrosion ( inspect with an eye loope) as the last thing my mill did...

I down loaded it from this site - called SX3.doc

Feedback from the spindle motor - It has 3 Hall Sensors named SA SB & SC These toggle from Ov to 5VDC
At any instant:-
any 2 could be high (5 VDC) while the third is low (0 Vdc)
or any 2 low while...

I had a similar problem:-

1) Would lockup spindle when starting from cold - Wait 10 minutes with power on and then spindle would work normally
2) After about a 2 weeks spindle would lockup...