4th Axis rotary

More
22 Feb 2011 11:55 #7375 by Rick G
Replied by Rick G on topic Re:4th Axis rotary
Hello John,

The more I read it the clearer it becomes to me. I think the description is written with an economy of words and is precise.
I certainly do not think I could do any better. I do think however an example would be helpful.
I would be glad to write a short example if you feel it would be helpful.


Rick

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

More
22 Feb 2011 11:58 #7376 by BigJohnT
Replied by BigJohnT on topic Re:4th Axis rotary
LOL, yes it is written in "programmer speak" an example would be good. Chris suggested that he might need to use G93. He also noticed that a tool change was done without a G43!

John

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

More
22 Feb 2011 12:20 #7377 by Rick G
Replied by Rick G on topic Re:4th Axis rotary
judedude,

From what I understand this is a G code thing not something that is unique to EMC.

You could set G94 and a F speed
G94
F20
run all the lines that combine linear and rotary motion.
then
Set G95 and a rotary F speed
G95
F200
run the lines that are rotary only
then set G94 and a F speed again

If the lines only occur a few places edit by hand.
If the lines occur often a change in the post processor with be a better solution.

By the way if there was only a very slight movement in say X,Y, or Z (.0001) combined with the rotary movement the rotary axis would move at high speed to the commanded position.

Rick G

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

More
22 Feb 2011 12:30 #7378 by Rick G
Replied by Rick G on topic Re:4th Axis rotary
John,

I have seen G93 suggested for this before but I have never tried it.
I will put together an example of G94 and G95 sometime soon.

As luck would have it it snowed...again, so I will be working on that.

Have a good one,

Rick

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

More
22 Feb 2011 17:56 #7382 by judedude
Replied by judedude on topic Re:4th Axis rotary
Rick,
Basically the distance a tool needs to travel around the OD will vary depending on diameter of the work. Therefore a velocity with a small diameter will not be the same as with a big diameter. Is there a way to define / re-define the configuration diameter so the feed rate is adjusted with diameter of the work.

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

More
23 Feb 2011 10:33 #7399 by Rick G
Replied by Rick G on topic Re:4th Axis rotary
If you are using the spindle of a lathe you can use G96 constant surface speed.


Rick G

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

Time to create page: 0.541 seconds
Powered by Kunena Forum