Limit switchs

More
02 Jan 2020 01:40 #153762 by PCW
Replied by PCW on topic Limit switchs
Right, so following errors are pretty much expected at this point

The basic scheme of setting up and tuning analog velocity mode servos is
documented here:

gnipsel.com/linuxcnc/tuning/servo.html
The following user(s) said Thank You: jeffie-3

Please Log in or Create an account to join the conversation.

More
02 Jan 2020 03:47 - 02 Jan 2020 18:52 #153768 by jeffie-3
Replied by jeffie-3 on topic Limit switchs
When moving the axes 0.100 it says on the screen 0.0834 What is a way to get that to match before I tune the servos?
Last edit: 02 Jan 2020 18:52 by jeffie-3.

Please Log in or Create an account to join the conversation.

More
05 Jan 2020 00:20 #154053 by jeffie-3
Replied by jeffie-3 on topic Limit switchs
The servo tuning instructions say to get the encoders scaled correctly in order to proceed with tuning the servos. How do I do that?

Please Log in or Create an account to join the conversation.

More
05 Jan 2020 01:04 #154056 by PCW
Replied by PCW on topic Limit switchs
You set the per axis ENCODER_SCALE parameters in the INI file to encoder counts per machine unit (machine units being inches or mm)

Please Log in or Create an account to join the conversation.

More
05 Jan 2020 01:46 #154061 by jeffie-3
Replied by jeffie-3 on topic Limit switchs
When I ran the PnCConf I put in all of that. But when I move the table the numbers are wrong. I went back and double checked the encoder, the two gears and the ballscrew. Does the problem lie in tuning the servos? Or does the movement numbers have to correct before I tune the servos?

Please Log in or Create an account to join the conversation.

More
05 Jan 2020 01:51 #154062 by tommylight
Replied by tommylight on topic Limit switchs
It has to be correct before tuning.

Please Log in or Create an account to join the conversation.

More
05 Jan 2020 01:58 #154064 by jeffie-3
Replied by jeffie-3 on topic Limit switchs
How do I correct it?

Please Log in or Create an account to join the conversation.

More
05 Jan 2020 02:06 #154067 by PCW
Replied by PCW on topic Limit switchs

When moving the axes 0.100 it says on the screen 0.0834 What is a way to get that to match before I tune the servos?


Did you command a move of 0.100" and got an actual move of 0.0834" ?
this would be expected without tuning

Normally you would check the encoder scaling and direction with the drives disabled
by using an indicator

Please Log in or Create an account to join the conversation.

More
05 Jan 2020 02:24 #154069 by jeffie-3
Replied by jeffie-3 on topic Limit switchs
How do I disable the drive? When moving the table by hand using an indicator. I move 0.100 and get 0.375 on the dro. When I use command to move the table 0.100 the dro says 0.0834 and the indicator says 0.007 of movement.

Please Log in or Create an account to join the conversation.

More
05 Jan 2020 02:37 #154070 by PCW
Replied by PCW on topic Limit switchs
The drives should be disabled when in estop
(but the DRO should still work)

Please Log in or Create an account to join the conversation.

Moderators: piasdom
Time to create page: 0.211 seconds
Powered by Kunena Forum