15161
SmoothStepper USB / Re: I hate this machine
« on: August 05, 2010, 06:32:05 PM »
I have just seen this, in your last PM said you thought it was cured.
Ok Backlash can come from bearings, mounts, pulleys etc as well as the screws so check them as well. First thing I would do is mount a clock (DTI) to the bearing housing and have the tip onto the end of the ballscrew, step jog one way then the other and see if the needle moves, if it does then you have looseness in the bearings.
Also check for slackness in the pulleys on both motors and screws.
Flex in mounts of ballscrews can also give you the backlash but you should be able to figure out a way of mounting the clock to check for that as well.
Hood
Ok Backlash can come from bearings, mounts, pulleys etc as well as the screws so check them as well. First thing I would do is mount a clock (DTI) to the bearing housing and have the tip onto the end of the ballscrew, step jog one way then the other and see if the needle moves, if it does then you have looseness in the bearings.
Also check for slackness in the pulleys on both motors and screws.
Flex in mounts of ballscrews can also give you the backlash but you should be able to figure out a way of mounting the clock to check for that as well.
Hood