On Mon, 24 Apr 2017, Valerio Bellizzomi wrote:

> Date: Mon, 24 Apr 2017 19:39:51 +0200
> From: Valerio Bellizzomi <vale...@selnet.org>
> Reply-To: "Enhanced Machine Controller (EMC)"
>     <emc-users@lists.sourceforge.net>
> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
> Subject: Re: [Emc-users] Drive Parameters
> 
> On Sun, 2017-04-23 at 16:42 +0200, Valerio Bellizzomi wrote:
>> Hello,
>> I have found the parameters here
>> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Stepper_Drive_Timing
>>
>> and wrote them in the .ini file, tested the motor and it still
>> vibrates.
>>
>>
>
> well well, apart of timing there is the P parameter which is important
>
> pncconf wrote a P value of 10000, which is too high and make the motor
> vibrate
>
> I wrote a P value of 100, that resolved the problem. completely.

P should normally be 1/servo thread period (so 1000 for a normal 1 KHz servo 
thread)

The current version of pncconf does set this correctly, not sure how you got 
yours set to 10000



Peter Wallace
Mesa Electronics


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