Re:Backlash Compensation

Hello,

Just edit your .ini file.

If they are not there already add
BACKLASH = x.xxx
(where .xxx ist the amount of BACKLASH) in the .ini files under each axis that you want to add backlash to.

From the manual...

BACKLASH = 0.000
Backlash in machine units. Backlash compensation value can be used to make up for small deficiencies in the hardware used to drive an axis. If backlash is added to an axis and you are using steppers the STEPGEN_MAXACCEL must be increased to 1.5 to 2 times the MAX_ACCELERATION for the axis.

Rick G

There are two ways to do compensation.
simple backlash compensation as Rick just described.

Or sophisticated screw compensation. Unfortunately not described in the manual very well.
look here:
wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Screw_Compensation
Chris M

i think you just edit it with a text editor

enrique hello, I'm from Argentina, someone can answer in Spanish?, my English is very bad, I fix the backslash and not as editing the file, I am translating with google translator, but his translation is not clear, Please anyone who can help me thank him,

e-mail: enri_siena@hotmail.com


hola soy enrique, soy de argentina, alguien puede contestarme en espanol?, mi ingles es muy malo, quiero corregir el backslash y no se como editar el archivo, estoy traduciendo , con los traductores de google, pero su traduccion no es clara, por favor cualquiera que pueda ayudarme se lo agradecere,
:blush:
e-mail: enri_siena@hotmail.com

gracias

Is there a description of the HAL pins: joint.X.backlash-corr, joint.X.backlash-filt? The joint.X.backlash-vel is clear I guess.

You seem to have found a 12 year old thread to reply to. Not that it matters, particularly.

Those pins are all outputs, quite possibly supplied only for debugging purposes.

What that means is that they are probably not very useful to you, they tell you what the system is doing in response to your other settings.

They are very briefly described in the motion manpage:

linuxcnc.org/docs/2.8/html/man/man9/motion.9.html