easy question on homing direction change (RESOLVED)
Moderator: cnckeith
-
- Posts: 45
- Joined: Sun Mar 01, 2020 6:13 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: 0401202408
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: georgia, USA
- Contact:
easy question on homing direction change (RESOLVED)
Newbie to centroid new machine setup with all in one. All is well but I'm homing the wrong direction in x and y. Is it correct that all I need to do is swap the numbers in the home + and - columns for those axes on the motor revs/inch page? The hom file does not indicate + or - so I guess that is built into that page?
1000's of industrial items for sale at industrialtoolandmachineworks.com
-
- Posts: 98
- Joined: Fri Jun 10, 2011 8:31 am
- Allin1DC CNC Controller: Yes
- CNC Control System Serial Number: none
- DC3IOB: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
Re: easy question on homing direction change
For changing the home direction u need to edit cncm.hom file
M92/X Move to X+ve limit switch while
M91/X Move to X-ve limit switch
M26/X zero home position.
You can change the direction by M92/X
By default x-axis home is in -ve direction (M91/X)
M92/X Move to X+ve limit switch while
M91/X Move to X-ve limit switch
M26/X zero home position.
You can change the direction by M92/X
By default x-axis home is in -ve direction (M91/X)
-
- Posts: 45
- Joined: Sun Mar 01, 2020 6:13 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: 0401202408
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: georgia, USA
- Contact:
Re: easy question on homing direction change
got it, m92 is move to + home, m91 move to - home
thanks
tom
thanks
tom
1000's of industrial items for sale at industrialtoolandmachineworks.com
Re: easy question on homing direction change
Assuming everything was set up correctly before, then when you change the homing direction, you will also need to change your software travel limits on the Machine Configuration -> Jog Parameters table.
For example, if you change an X axis from homing minus (M91) to homing plus (M92), then you would change the X axis plus travel distance to zero, and the minus distance to a negative number for the total travel of the axis.
For example, if you change an X axis from homing minus (M91) to homing plus (M92), then you would change the X axis plus travel distance to zero, and the minus distance to a negative number for the total travel of the axis.
-
- Posts: 45
- Joined: Sun Mar 01, 2020 6:13 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: 0401202408
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: georgia, USA
- Contact:
Re: easy question on homing direction change
Thanks, I was able to pass the system test by setting the dist between travel limits < distance between home switches. The installation manual implied that soft limits should only be set for the end of travel opposite the home end, is that correct? I'd like to have soft limits at the homing end as well if it won't interfere with homing. Is that possible?
1000's of industrial items for sale at industrialtoolandmachineworks.com
-
- Posts: 9914
- Joined: Tue Mar 28, 2017 12:01 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Location: Mesa, AZ
Re: easy question on homing direction change
NO it doesn't work that way.tomj wrote: ↑Fri Jun 05, 2020 10:53 pm Thanks, I was able to pass the system test by setting the dist between travel limits < distance between home switches. The installation manual implied that soft limits should only be set for the end of travel opposite the home end, is that correct? I'd like to have soft limits at the homing end as well if it won't interfere with homing. Is that possible?
When your machine homes, it hits the MECHANICAL switch, then come off of it and hunts for the Z index marker pulse for precise repeatable homing. That position is MACHINE 0. You set the SOFT limit for the other end of the travel, it must be shy a certain amount from the opposite end mechanical travel switch. The SYSTEM test checks all of this. SO, if you passed the system test your machine should be setup properly. Leave it alone. Make a back up of the report file on a USB stick and keep it tagged and perhaps in the control cabinet or somewhere safe. The control will make a frequent back up of the report file. BUT if the drive crashes, all your work is out the window and you'll have to start from scratch again. A new drive or computer, a fresh install of the software and restoring from a report will have you back up and running in minutes.
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
We can't "SEE" what you see...
Mesa, AZ
-
- Posts: 45
- Joined: Sun Mar 01, 2020 6:13 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: 0401202408
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: georgia, USA
- Contact:
Re: easy question on homing direction change (RESOLVED)
I know about the report, but during jogging or running a program is there a way to have the machine decel prior to touching the limit switch at the home end of travel like (I think it supposed to) at the far end? I think I read that it will error out if a program is loaded that commands a move outside of the travel limits (or soft limits if configured). Presumably the control could be configured to know to suspend a programmed soft limit for the homing end only when actually homing, no? or maybe it already knows to decel a certain distance from that switch?
1000's of industrial items for sale at industrialtoolandmachineworks.com
-
- Posts: 9914
- Joined: Tue Mar 28, 2017 12:01 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Location: Mesa, AZ
Re: easy question on homing direction change (RESOLVED)
If you set up the soft limits correctly, the control does this automatically as it approaches the soft limits.tomj wrote: ↑Sun Jun 07, 2020 10:45 am I know about the report, but during jogging or running a program is there a way to have the machine decel prior to touching the limit switch at the home end of travel like (I think it supposed to) at the far end? I think I read that it will error out if a program is loaded that commands a move outside of the travel limits (or soft limits if configured). Presumably the control could be configured to know to suspend a programmed soft limit for the homing end only when actually homing, no? or maybe it already knows to decel a certain distance from that switch?
This is part of the system test. To make sure YOU configured all of this correctly
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
We can't "SEE" what you see...
Mesa, AZ
-
- Posts: 45
- Joined: Sun Mar 01, 2020 6:13 pm
- Acorn CNC Controller: No
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: 0401202408
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: georgia, USA
- Contact:
Re: easy question on homing direction change (RESOLVED)
I see, so that was the multiple triggers of the limit switches during the system test. So I can assume that the system will decelerate as it approaches BOTH the limit switches used for homing as well as the opposite end ones that I have entered soft limit numbers for even though I have zero in the soft limit column for the homing end of those axes?
1000's of industrial items for sale at industrialtoolandmachineworks.com
-
- Posts: 9914
- Joined: Tue Mar 28, 2017 12:01 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Location: Mesa, AZ
Re: easy question on homing direction change (RESOLVED)
Correct. 0 typical for the homing end.tomj wrote: ↑Sun Jun 07, 2020 12:23 pm I see, so that was the multiple triggers of the limit switches during the system test. So I can assume that the system will decelerate as it approaches BOTH the limit switches used for homing as well as the opposite end ones that I have entered soft limit numbers for even though I have zero in the soft limit column for the homing end of those axes?
If you passed systems test, you should be good to go provided axis are calibrated correctly.
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
We can't "SEE" what you see...
Mesa, AZ