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Old 06-20-2020, 10:28 PM
Cstinson Cstinson is offline
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Join Date: Apr 2016
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Default Knocking noise coming from one of the X axis motors

I have a 5x10 Cobra. There is a knocking noise about 2 knocks per revolution that is coming from the motor pulley on one side. It just randomly started. I pulled everything apart and loosened the belt and the knock went away. But the belt was too loose and so I tightened it back snug enough to not have any slack and it started knocking again. There is NO indication of something rubbing against something else when everything is pulled apart and disassembled. So is it in the motor?


Thanks in advance,
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Old 06-21-2020, 07:59 AM
carasel carasel is offline
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Join Date: Jul 2012
Posts: 106

Did you check for stuff stuck in the gear or rail teeth?
Eddie Kitson
Cobra 5x8 ATC
5hp spindle
20hp regen vac
laser pointer
V carve 9.5
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Old 06-21-2020, 09:27 AM
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Gary Campbell Gary Campbell is offline
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Join Date: Dec 2012
Location: Marquette, MI USA
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Check the bearings on the trans shaft (has the large gear)
Gary Campbell
CNC Technology and Training
The Ultimate Woodworking Machine

"There are 10 kinds of people in the world. Those that understand binary logic, and those who don't"
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