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

Hi Fred,

Nothing so simple, I'm afraid. The large pulleys have tapered hub
clamps (and are tight) and the smaller pulleys are broached - i.e. keyed
and the set screwed. The belts are tensioned pretty well right.

Cheers, Peter

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.
>
>Best Regards, Fred Smith- IMService
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