- Joined
- Dec 3, 2013
- Messages
- 1,844
The following assumes the spindle is aligned to the bed and there is no twist in the bed.
For the chuck start at ground zero and measure the face of the spindle. Next check for burrs and install the back plate and measure the face of the chuck mating surface. Next check for burrs and install the chuck body and measure the face.
The spindle should be good. If the back plate is not running true you can skim cut the mating surface. If the chuck body is out it would need to be disassembled and examined.
If all of the above are good it could be the jaws or T-slots are not perfect. You can check that with a precision ground rod by measuring along the top and front checking for taper. Turn the chuck 1/4 turn and measure again.
The quick and dirty method for checking the cross slide is to face a piece of material, the larger the better, and running an indicator across the face. It should read zero across the entire face.
Use a 0-4-0 dial test indicator for the above.
For the chuck start at ground zero and measure the face of the spindle. Next check for burrs and install the back plate and measure the face of the chuck mating surface. Next check for burrs and install the chuck body and measure the face.
The spindle should be good. If the back plate is not running true you can skim cut the mating surface. If the chuck body is out it would need to be disassembled and examined.
If all of the above are good it could be the jaws or T-slots are not perfect. You can check that with a precision ground rod by measuring along the top and front checking for taper. Turn the chuck 1/4 turn and measure again.
The quick and dirty method for checking the cross slide is to face a piece of material, the larger the better, and running an indicator across the face. It should read zero across the entire face.
Use a 0-4-0 dial test indicator for the above.