Lathe OD Turning

This is my OD turning subroutine. You can tell it what the roughing parameters are and the finish parameters. Used with Dewey's TCL GUI it is a one button turning tool.



John

Can I suggest that I find it more convenient to start my (similar) routines from the current tool position, rather than have to measure the blank and type in that measurement?
It takes a bit of fiddling with a G92 and a G92.2 (it would be rather nice if EMC2 could copy the current xyzabcuvw to memory locations, though I guess the question of "when" would need to be addressed)

Hi Andy,

I do basically the same thing but touch off the Z (only one needed) in the G54 coordinate system on my lathe and call that Z0 so no measuring is needed. Once that is done on one tool all the tools on my turret are set for X and Z offsets as I set the Z offset for each tool (without any G54 offset in effect) from the face of the spindle. In the future I plan on adding a flip down tool setter for Z as on occasion I could not reach the spindle face when I tried to add a tool to the turret while material is in the collet.

On my plasma I use G92 on every file. I jog over to the X Y start point and press run then one of the first lines are G92 X0 Y0 then near the end I use G92.1 to clear the offsets.

John

I think I failed to explain what I meant.
With my lathe roughing subs I jog to where I want the operation to start and type in where I want it to end. I only use the G92 as a dodge to read the current tool position into the G-code.
This means that I can deal with different sizes of stock without having to actually measure anything.

Andy,

Are you talking about the Z axis only? I'm more confused than before... it must be the English accent

John

BigJohnT wrote:

. it must be the English accent

Let me try EMC-accented G-code then

M66 E3 L00
#1 = #5399 (Finish X)
M66 E4 L00
#5 = #5399 (Finish Z )

G92 x0 z0 (store position)
g92.2
#14 = [#5211 * 2] (starting X)
#13 = #5213 (starting Z)
g92.1

Hi Rick,

It seems to have vaporized into electron dust.

I'll have to upload it again... my network is off atm so it will be a bit later today before I can upload it again.

John

Rick, here it is again.

John