Quoth Peter C. Wallace.....
>On Wed, 2 Oct 2013, Russell Brown wrote:
>
>> It's a stepper based system using a Mesa 5I25 and the standard
>> BASE_PERIOD of 50us which should allow 20,000 steps per second
>> (according to TFM).
>
>There should be no base thread at all with hardware stepgens
>(it will make things worse and may even be the cause of the following error)
The original config from pncconf didn't have the BASE_PERIOD in the .ini
file. I did put one in during my flailing around but I've just taken it
out and there's no difference.
However, it looks like my .hal file (pncconf generated) doesn't use it
anyway:-
Mesa_Mill.hal:loadrt [EMCMOT]EMCMOT servo_period_nsec=[EMCMOT]SERVO_PERIOD
num_joints=[TRAJ]AXES
and talking of the .hal file, the only thing that's changed from the
pncconf generated version is AFAIR that I had to comment out the
following two lines:
loadrt abs names=
loadrt lowpass names=
as linuxcnc won't start with them in the file.
>One thing that is required is that the per axis stepgen maxaccel parameter be
>set to about 20% greater than the machine maxaccel for that axis.
I did have it set to double (700). Just tried 420 (350 * 1.2). No
difference :-(
FWIW, I've stuck my .ini and .hal files here:
http://ruffle.me.uk/cnc/Mesa_Mill.ini
http://ruffle.me.uk/cnc/Mesa_Mill.hal
if anyone's kind enough to have a quick gander and tell me what stupid
mistake I've made I'd be very grateful.
--
Regards,
Russell
--------------------------------------------------------------------
| Russell Brown | MAIL: russ...@lls.com PHONE: 01780 471800 |
| Lady Lodge Systems | WWW Work: http://www.lls.com |
| Peterborough, England | WWW Play: http://www.ruffle.me.uk |
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