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

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

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

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.

If you are using the spindle of a lathe you can use G96 constant surface speed.


Rick G