Z Axis Backlash/play

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jamesgates1000
CNC Apprentice
CNC Apprentice
Posts: 74
Joined: Sat 01 Aug , 2015 9:23 am
Hardware/Software: 2001 Cyclone with toolchanger and Fanuc 21i control
Serial number - H00913.
Voltage 415V F.L.C 20A 50Hz 3Ph

1997 Triac VMCwith toolchanger and Fanuc O-M control
Serial number - 70826B.
Voltage 415V F.L.C 30A 50Hz 3Ph

Z Axis Backlash/play

Post by jamesgates1000 » Wed 09 Jan , 2019 13:32 pm

The Z axis of the cyclone has a couple of thou backlash until very recently. Not I can push and pull the tool turret 0.4-0.5mm, I am pulling from the base as close to the ballscrew as I can get so guessing that it is either worn ballscrew or the bearings. Seems to have coincided with me taking off the chuck and removing software limit and doing a job on a faceplate.

Does anyone have any idea on how to pinpoint where this play is and eliminating it?

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Steve
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Posts: 1261
Joined: Tue 21 Feb , 2006 16:15 pm
Location: Denford UK

Re: Z Axis Backlash/play

Post by Steve » Fri 11 Jan , 2019 12:45 pm

Can you check to see if the movement is withing the nut or ballscrew mounting? When you pull it back and forward is the screw moving with the backlash or is the screw staying in the same position but the saddle moving? If the screw is moving then check the mounting bearings at the end of the screw.

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