G92 messing up the coordinate
26 Feb 2012 07:18 - 26 Feb 2012 07:25 #18089
by KenC
Replied by KenC on topic Re:G92 messing up the coordinate
To put things real simple. I use G92 to assign new coordinate value. Mostly on Z axis.
It will work nicely for the 1st time when I open EMC. & I can run a .ngc happily with it.
& when I wish to assign a new coordinate with G92, the warning bar at the bottom right of AXIS screen will flash "exceed joint's negative limit". without fail.
When I use G92.1, it will reset the DRO coordinate values but still flashes the "exceed joint's limit" warning.
So what I do to continue with work is G0 0,0 & close EMC. Re-open EMC & home all the axis all over again.
Again, I do my homing manually as I don't have limit switches installed.
I tried G10 L20, but I get warning asying "out of range"...
Regards
KEn
It will work nicely for the 1st time when I open EMC. & I can run a .ngc happily with it.
& when I wish to assign a new coordinate with G92, the warning bar at the bottom right of AXIS screen will flash "exceed joint's negative limit". without fail.
When I use G92.1, it will reset the DRO coordinate values but still flashes the "exceed joint's limit" warning.
So what I do to continue with work is G0 0,0 & close EMC. Re-open EMC & home all the axis all over again.
Again, I do my homing manually as I don't have limit switches installed.
I tried G10 L20, but I get warning asying "out of range"...
Regards
KEn
Last edit: 26 Feb 2012 07:25 by KenC.
Please Log in or Create an account to join the conversation.
26 Feb 2012 09:34 - 26 Feb 2012 09:45 #18092
by Rick G
Replied by Rick G on topic Re:G92 messing up the coordinate
Be sure to use P with G10
Such as G10 L20 P1 X0 Y0
Have you looked at your tool table?
Have you made sure all offsets are off such as G49?
linuxcnc.org/docs/html/gcode_main.html#sub:G43,-G49:-Tool
Rick G
Such as G10 L20 P1 X0 Y0
Have you looked at your tool table?
Have you made sure all offsets are off such as G49?
linuxcnc.org/docs/html/gcode_main.html#sub:G43,-G49:-Tool
Rick G
Last edit: 26 Feb 2012 09:45 by Rick G.
Please Log in or Create an account to join the conversation.
26 Feb 2012 11:27 #18095
by BigJohnT
Replied by BigJohnT on topic Re:G92 messing up the coordinate
I use G92 all the time on my plasma table so I know it does not mess up my coordinate system. Can you attach a bit of code that will reproduce the problem so we can help you?
John
John
Please Log in or Create an account to join the conversation.
26 Feb 2012 12:08 - 26 Feb 2012 12:17 #18097
by Rick G
Replied by Rick G on topic Re:G92 messing up the coordinate
As John said...
So do I on my router, mill and lathe without a problem.
You might want to look here..
linuxcnc.org/docs/html/common_User_Concepts.html#r1_5_3
Rick G
I use G92 all the time on my plasma table so I know it does not mess up my coordinate system
So do I on my router, mill and lathe without a problem.
You might want to look here..
linuxcnc.org/docs/html/common_User_Concepts.html#r1_5_3
Rick G
Last edit: 26 Feb 2012 12:17 by Rick G.
Please Log in or Create an account to join the conversation.
27 Feb 2012 04:01 - 27 Feb 2012 04:07 #18111
by KenC
Replied by KenC on topic Re:G92 messing up the coordinate
Hi John,
I write single command on the MDI screen. It will do its black magic everytime.
G92 Zxx.xx (xx.xx being any number, + or -ve)
That is all I need to do to screw everything up.
Hi Rick,
Thank for the pointer, will dig deep into the links you attached.
Thousand thanks.
Ken
I write single command on the MDI screen. It will do its black magic everytime.
G92 Zxx.xx (xx.xx being any number, + or -ve)
That is all I need to do to screw everything up.
Hi Rick,
Thank for the pointer, will dig deep into the links you attached.
Thousand thanks.
Ken
Last edit: 27 Feb 2012 04:07 by KenC.
Please Log in or Create an account to join the conversation.
27 Feb 2012 12:38 #18126
by BigJohnT
Replied by BigJohnT on topic Re:G92 messing up the coordinate
Gee, can you be a bit more precise than "black magic" G92 Z anything works as expected for me and everyone else.
John
John
Please Log in or Create an account to join the conversation.
27 Feb 2012 12:56 - 27 Feb 2012 13:05 #18127
by KenC
Replied by KenC on topic Re:G92 messing up the coordinate
John,
I have no idea what is the word to describe it...
I get “exceed join'ts limit" faithfully whenever I issue a second G92 command every time & if I ignore it & continue working, the machine will go to coordinates which are totally outside of all the soft limits.
This happens the same with V2.3.4 on 8,04 & the current 2.4.7
I have no intention to act like I'm cute or funny... but honestly, I have no other words to describe the mess made after I issue a G92 single command from the MDI command bar... everything is a mess & as these software "vocab" is voodoo to me...
Rick, I am not re-setting the machine co-ordinates, I still need the coordinated to remain so that the machine won't rush out of the soft limits. SO that G43, G49, G53 are not the things I want... I just want to re assign the work co-ordinate & not the machine cordinates.
Regards
Ken
I have no idea what is the word to describe it...
I get “exceed join'ts limit" faithfully whenever I issue a second G92 command every time & if I ignore it & continue working, the machine will go to coordinates which are totally outside of all the soft limits.
This happens the same with V2.3.4 on 8,04 & the current 2.4.7
I have no intention to act like I'm cute or funny... but honestly, I have no other words to describe the mess made after I issue a G92 single command from the MDI command bar... everything is a mess & as these software "vocab" is voodoo to me...
Rick, I am not re-setting the machine co-ordinates, I still need the coordinated to remain so that the machine won't rush out of the soft limits. SO that G43, G49, G53 are not the things I want... I just want to re assign the work co-ordinate & not the machine cordinates.
Regards
Ken
Last edit: 27 Feb 2012 13:05 by KenC.
Please Log in or Create an account to join the conversation.
27 Feb 2012 13:07 - 27 Feb 2012 13:08 #18128
by BigJohnT
Replied by BigJohnT on topic Re:G92 messing up the coordinate
Ok, Do you have a G54 offset in effect for the Z axis? In 2.4.x go to Machine > Zero Coordinate System and zero out the P1 G54 (which I assume your using).
Also, do you have a tool loaded with Tx M6 G43?
John
Also, do you have a tool loaded with Tx M6 G43?
John
Last edit: 27 Feb 2012 13:08 by BigJohnT.
Please Log in or Create an account to join the conversation.
27 Feb 2012 13:12 #18129
by KenC
Replied by KenC on topic Re:G92 messing up the coordinate
Hi John,
I never touched that section of the screen I left it as default.
Anyway, I just did selected P1 G54 as you describe.
"Also, do you have a tool loaded with Tx M6 G43?"
I have no idea what this is.
Regards
Ken
I never touched that section of the screen I left it as default.
Anyway, I just did selected P1 G54 as you describe.
"Also, do you have a tool loaded with Tx M6 G43?"
I have no idea what this is.
Regards
Ken
Please Log in or Create an account to join the conversation.
27 Feb 2012 13:21 #18130
by BigJohnT
Replied by BigJohnT on topic Re:G92 messing up the coordinate
When you Home your axes does the DRO show 0.0000 for all axes?
Does the bottom line say ON No tool Position: Relative Actual?
John
Does the bottom line say ON No tool Position: Relative Actual?
John
Please Log in or Create an account to join the conversation.
Time to create page: 0.102 seconds