Show final position via HAL

More
02 Apr 2011 09:59 - 02 Apr 2011 10:06 #8387 by Mike_Eitel
Hi
I'm implementing a new jogwheel to my configuration.
( 4 axis, stepperconfig via parport, jogwheel via second parport , Ububtu 8.4 , EMC version 2.4.6 )

I use pyvcp to add informations to axis.
I can see prechoosen axis, jogging activity, and choosen scale factor.

As my mill is not the fastest, it's easy to jog/request a position that is farer than I want to go....
Therefore it would be nice to show the "position" that the axis will reach when "jogged" position is finaly reached. ( Sorry for my expressions, I'm not native English)

I looked around doc, also HAL Show and HAL Meter, that shows the "aimed to position" for an axis. Could not find any pin.

Could somebody give me a hint for that signal/pin

THX Mike

P.S.
pend-counts is not usable, nor "x"pos-cmd or "x"pos-fb
Last edit: 02 Apr 2011 10:06 by Mike_Eitel.

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

More
02 Apr 2011 11:50 #8393 by BigJohnT
I assume you mean you have a MPG to jog with and you are in position mode. Normally you use velocity mode so when you stop turning the dial the machine stops.

www.linuxcnc.org/docview/html/examples_mpg.html

John

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

More
03 Apr 2011 09:57 #8410 by Mike_Eitel
Hi John, THX

Yes you are right.
But some month ago I was not succesfull with the velocity mode, will retest it again.

Nevertheless I thonk it could be nice to show the precise position you want to reach... For a "manual" milling mode.
Friend of mine also likes the idea.....

Any hint's where I could find that "to go to" value and or a description how the jogimg functionality works .....

Mike

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

More
03 Apr 2011 17:10 #8419 by BigJohnT
You might look at the motion group and see if one of those gives you that info.

www.linuxcnc.org/docview/html/man/man9/motion.9.html

For manual milling to a specific point I would just use the MDI tab and type in G1 X1.234 Y2.3435 F12.3 and know you will cut that path. A little slip of the encoder wheel and you might not get what you desire...

John

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

More
03 Apr 2011 18:54 #8420 by Mike_Eitel
THX John

I accept your argumets... For sure I use MDI mode ... but somehow hasjogging a little bit the "charm of manual milling" ;-)

And with my slow "hobyist" mill I could corect to the correct value, if I can see on the screen, before my mill reaches position.

I will look tommorow in the link you gave me, I hope I missed one of those pins.....

THX and good night
Mike

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

More
03 Apr 2011 20:27 #8423 by BigJohnT
Give velocity mode a whirl and see if you can get the "charm of manual milling" that way. With a slow mill even if you know the endpoint to me that would get me confused watching the cutter cut and twirling the hand wheel as I cut only to look up and see that I will go well past the point that I desire.

Another option is to write a comp perhaps. I have one that hijacks the Z for my torch height control.

John

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

Time to create page: 0.066 seconds
Powered by Kunena Forum