Re: [CAD_CAM_EDM_DRO] Re: 3D Contouring - Loss of Accuracy

IMService wrote:

>> Date: Tue, 17 Dec 2002 14:12:16 -0500
>> From: Peter <prenolds@...>
>>Subject: 3D Contouring - Loss of Accuracy
>>I'm stumped! On my BP-clone knee mill, I've tried everything I can
>>think of and nothing seems to produce the results I'm looking for. What
>>I find is that running a large 3D file I gradually accumulate a small
>>error typically in one of the most active axes which often exceeds 0.3mm
>>or .012" after half an hour to an hour of running time. It is usually
>>in the same direction, but not always. Below are some of the things
>>
>>
>
>Look for a mechanical slippage. Possibly a loose set screw on a motor shaft or coupling.
>
>

No, he made it clear the loss of position reference happens when the
motors are not connected to the machine.
(That could cause resonance, of course.)

Jon