On Mon, 12 Oct 2015, Gene Heskett wrote:
> Date: Mon, 12 Oct 2015 17:02:20 -0400
> From: Gene Heskett <[email protected]>
> Reply-To: "Enhanced Machine Controller (EMC)"
> <[email protected]>
> To: [email protected]
> Subject: Re: [Emc-users] To PCW: retuning for inches
>
> On Monday 12 October 2015 16:10:47 Peter C. Wallace wrote:
>
>> On Mon, 12 Oct 2015, Gene Heskett wrote:
>>> Date: Mon, 12 Oct 2015 15:56:07 -0400
>>> From: Gene Heskett <[email protected]>
>>> Reply-To: "Enhanced Machine Controller (EMC)"
>>> <[email protected]>
>>> To: "Enhanced Machine Controller (EMC)"
>>> <[email protected]> Subject: [Emc-users] To PCW:
>>> retuning for inches
>>>
>>> Greetings Peter;
>>>
>>> In getting a decent rapids w/o following error, I wound up with all
>>> the pid.Pgains at 2000, and while I played with the FF2 setting,
>>> couldn't detect that is was affecting anything I'm smart enough to
>>> detect.
>>
>> PGain should really be 1/period, more _will_ cause
>> overshoot/oscillations
>>
>>> However, after a move of one of the axis's I can hear a faint tone
>>> at the servo-thread frequency from the motors. Firing up halscope
>>> and looking at the x,y,x outputs, when its singing I can see this
>>> tone at all the pid.outputs, at from 15 to 50 milivolts peak to
>>> peak. Move an axis a couple thou and it may stop.
>>
>> This is most likely the step driver (or excessive Pgain, see above)
>
> I'll get following errors fairly quickly at 1000.
Then something is really broken, you might have to post your hal/ini files
(also FF2 of .0005 is way to large .00005 shoud be closer)
Peter Wallace
Mesa Electronics
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