problems with the home position on vertical mill

[theblacksmith22]

hi there, I'm having an issue with home my machine and its really stumping all of us the machine is a you-ji YV-600ATC+C now the axis are decel dog homing, so the machine does this intermittently it will home Y position .800 out of position, cycle power to the machine in homes in the correct position sometimes we have to cycle power several times to get it to home properly any ideas ? I was thinking maybe the limits are sticking but they seam to be free I'm at a loss any help will be appreciated. Thanks

 

[DouglasJRizzo]

A few things to look at.
The trip dogs may be sticking.
They may also be on their way out and causing issues.
There could be coolant "glop" and chips and stuff stuck in there somewhere.

My guess is the trip switches are sticking and may need to be replaced.
When I shut down my older CNCs with trip switches, I bring the axis off of home position by a few inches.

 

[theblacksmith22]

ill check into this thanks, and we bring our axis off home too to prevent possible over travels in the mornings

 

[Ox]

Trip the switch with your fingers.
Can you hear or feel the "click"?
If yes, does it seem "sure" or kind'a wishy worshy?


.800"?
Or maybe .7874"?


Install a new switch, and toss a spare in the cabinet.



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Think Snow Eh!
Ox