Re: [CAD_CAM_EDM_DRO] Re: Ferror & minferror

zbushz wrote:

>
>Steve,
>Thanks for your reply... I think you have rattled some grey matter...
>In fact The machine is running in "inches" and yes 0.1 does seem
>huge...but it works...tighter settings ie ferror = 0.005 minferror =
>0.001 have cause much pulling of hair in the past.
>What you said about when the proportional ferror can't be used it
>reverts to the fixed minferror... makes a lot of sense. I was under
>the impression that they were both proportional values and... that
>was giving me the "headache".
>The beast should be capable of tight tollerances. 2.5 hp ac servos
>running a machine about the size of a Bridgeport Boss.
> I will try to quiz the guys at EMC users... I am a member of that
>august group...but I have lurked so long I have no idea what my
>password is...but I can fix that.
>
>

My servo-controlled machine has high-resolution encoders, and I can set
these error bounds really tight, and it usually holds +/- 0.00015" up to
30 IPM or so. (That's all theoretical, between the CPU and the encoder,
not real table position.)

Jon