Align portal milling cutter

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23 Apr 2022 08:09 #240974 by mgm
I have seen a long time ago on a website a way to align y axis to x axis. Unfortunately the website has been closed!
What I mean is:
If y moves 100 mm x should be automatically corrected by 0.1mm!

Can someone help me there?

 

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23 Apr 2022 08:32 #240976 by andypugh
"millkins" does this, but might need changes to work properly with a dual-motor axis if you have one.

wiki.linuxcnc.org/cgi-bin/wiki.pl?Contri...omponents#Kinematics

linuxcnc.org/docs/stable/html/motion/kinematics.html

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24 Apr 2022 15:36 #241074 by mgm
Replied by mgm on topic Align portal milling cutter
Yes I have 2 motors on the Y axis.

I have now experimented in a sim today, but unfortunately without success. I keep getting an error message that the limit is exceeded! I suppose that is but on the joint assignment!
Then I tried in the millkins to add a second y axis, but honestly I have no idea what I'm doing .....
Is there anyone who has the millkins with two y motors running?

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25 Apr 2022 10:09 #241183 by andypugh
The sims have simulated limit switches and do tend to get a bit tangled up sometimes. (Hmm, we should probably try to fix that)

Are you using auto-squaring (ie, there are two home switches for Y and negative homing sequence numbers in the INI?)

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25 Apr 2022 10:57 #241190 by rodw
Replied by rodw on topic Align portal milling cutter

I have seen a long time ago on a website a way to align y axis to x axis. Unfortunately the website has been closed!
What I mean is:
If y moves 100 mm x should be automatically corrected by 0.1mm!

Can someone help me there?


 

I seem to remember writing a custom component to do this for another member in a few lines of code. Its here on the forum somewhere

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25 Apr 2022 13:01 - 25 Apr 2022 13:01 #241203 by andypugh
Here is a version of millkins for an XYZY configuration (XYZY is hard-coded in)

sudo halcompile --install skewkins.c

Should install it. If you don't see a "cp ... skewkins...." towards the end of the output then it hasn't worked. In that case paste the output here.
Attachments:
Last edit: 25 Apr 2022 13:01 by andypugh.

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25 Apr 2022 18:19 #241231 by mgm
Replied by mgm on topic Align portal milling cutter
Hello Andy
Thanks for the info ...

I already have 2 limit switches on y and also the negative homesequence.
My partal is made of MULTIPLEX and has a length of 3000mm.
Unfortunately, the table with the side guides is 1mm wider at the back than at the front and so I have quite exaggerated a "V".
I have now so mediated that I have on both sides now at 1000 mm in y 3/10.
The machine is used to make furniture.

Thanks for adjusting the millkins.
I will try it out ......

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27 Apr 2022 23:23 #241413 by andypugh
And?

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28 Apr 2022 11:28 #241457 by mgm
Replied by mgm on topic Align portal milling cutter
sorry that I have not yet answered but in the workshop is currently stress announced!

But I have just tried it.
skewkins has compiled

But if I now change the entries in the hall I get an error:
 

File Attachment:

File Name: linuxcnc_2...4-28.txt
File Size:6 KB
Attachments:

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28 Apr 2022 12:01 #241462 by andypugh
Ah, interesting....
This is related to the addition of switchable kinematics to LinuxCNC master.

Add
KINS_NOT_SWITCHABLE

to the .c file just above the "EXPORT_FUNCTION" lines

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