2013/7/11 Marshland Engineering marshl...@marshland.co.nz
2. A higher servo thread rate than 1 KHz may be required to close the
velocity portion (D term) of the loop with acceptable gain/stability
How do I change this ?
You need to change servo period length, it is specified in INI
Anything that ends up in HAL can be tweaked live (without restarting
LinuxCNC). This includes PID gains, stepgen timing, etc. I use
halcmd -kf in a terminal to do this.
I'll try this. Thanks
2. A higher servo thread rate than 1 KHz may be required to close the
velocity portion (D term)
On 11 July 2013 21:58, Marshland Engineering marshl...@marshland.co.nz wrote:
The only way we could get any stability was with the drives in Current mode
and Tacho feedback. Nothing else was stable.
Was this with a bare motor, or with the motor mounted in the machine?
--
atp
If you can't fix
On 7/11/2013 10:00 PM, Jon Elson wrote:
Marshland Engineering wrote:
The only way we could get any stability was with the drives in Current mode
and Tacho feedback. Nothing else was stable.
This is contradictory. Current mode does not use tach feedback. if you
have the tach
After a 'few' more hours, we have got quite a bit further with getting the
system running.
Basically we scrapped PNCConfig and started editing the files directly.
We set all the velocities, accelerations, following errors to huge values so
the system would run and then we started tweaking the
On 07/10/2013 06:50 PM, Marshland Engineering wrote:
Ok So what we need to do now is trim the velocities, acc, errors etc on the
run to get the best results. The feed rate on the screen and the PID is
great but we need to get access to the balance of the INI bits. Opening
and closing
On Thu, 11 Jul 2013, Marshland Engineering wrote:
Date: Thu, 11 Jul 2013 12:50:49 +1200
From: Marshland Engineering marshl...@marshland.co.nz
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Diagnostiic
Marshland Engineering wrote:
Ok So what we need to do now is trim the velocities, acc, errors etc on the
run to get the best results. The feed rate on the screen and the PID is
great but we need to get access to the balance of the INI bits. Opening
and closing LinuxCNC with each mod is just
