On 26/02/2020 19:07, Peter C. Wallace wrote:
On Wed, 26 Feb 2020, Ed W wrote:
MAX_VELOCITY = 100.0
MAX_ACCELERATION = 750.0
# The values below should be 25% larger than MAX_VELOCITY and
MAX_ACCELERATION
# If using BACKLASH compensation STEPGEN_MAXACCEL should be 100%
larger.
STEPGEN_MAXVEL = 125.00
STEPGEN_MAXACCEL = 937.50
P = 1000.0
..
Ed W
You can use the built in position mode control loop in the driver
(without PID) but you can get better performance by using PID and
velocity mode, especially with regard to host servo thread jitter.
This is why PNCCONF uses thsi control mode even for open loop step
motor systems.
Thanks everyone who responded.
Can I ask about the need for the STEPGEN_MAXVEL and _MAXACCEL. The man
pages suggest that if these can (should?) be omitted and would then be
infinite or something sensible (the manual is unclear)?
Actually, I think I might have that mixed up? I think what is suggested
is that there is no need to duplicate the MAX_VELOCITY in both the
AXIS_n and JOIN_n sections?
It's really only a cleanup, but any comments on whether all of these
values need to be there and duplicated, etc? Which get pulled automatically?
Thanks
Ed W
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
