still more Vertical Lathe fun -- G96 CSS mode

I was messing around with the vertical lathe setup this weekend and found that it can do G96 (CSS) constant surface speed. I had read in the mach forums that it was bugy and wanted to see. it turns out that it only has a problem in FPR feed mode ( G95 feed per rev ) but it seems to work fine in FPM ( G94 feed per minute ) mode. I am not really sure how much I would use this but " I had to know"
The code for this cut is..

G20 G40 (inch and clear any comp.)
G00 X1.635 Z-0.02 (rapid to start point)
G48 S4000 (set max spindle speed)
G96 S300 M3 (select CSS and sfm and start spindle)
G94 (set to feed/min)
G01 X-.05 F3 (feed to X... @f3)
g0 z.1 (retract to safe Z)
x2.1 (retract to clear work )
G97 S0 M3 (set to rpm mode)
M30 (all done)

The G48 sets a max allowable rpm ( I wasn't sure how fast I could spin that R8 chuck)
Not sure how much I will use this...but I thought it was cool.

Listen to the spindle ramp up as the diameter gets smaller.

[ame=http://www.youtube.com/watch?v=DllPNbqfnvY]G96 test on Tormach vertical lathe - YouTube[/ame]

Scott

Scott,

Would you be willing to share your Mach config file with me? I'd like to try this out, and don't want to have to reinvent the wheel.

Frederic

I would have to check with Tormach. I think you will need to sign the waiver to use it.

Scott

OK. I can sign the waiver if need be. I didn't realize it was a Tormach file. I thought it was one that you had developed on your own.

Frederic

Hi Fred
I did do the file. But in order to use it you have to have the unlocked version of Mach. Otherwise you cannot select that configuration at startup. I cloned the base config and renamed it Vertical Lathe .

I will talk to Tormach tomorrow.

Scott

"Would you be willing to share your Mach config file with me? I'd like to try this out, and don't want to have to reinvent the wheel."

+1