Emco PC120 Turn

[Chaz]

Ok, based on this, my X is upside down?


The turret sits on the top. So it should be showing +36, not -36 (relative to the zero line)?

[Chaz]

Ok. Some progress. Firstly, if something has 'professionally' been converted. Check everything.

X was upside down.
Steps were wrong. Explains why some circles too big and some too small.

Still having a lesser issue. I should end up with a 10mm profile but the G Code is not making that happen. The left over sizes are too large. I suspect its something on the Fusion tooling side, its as if its adding in some additional size somewhere. There is nowhere below where I can get a 10mm and 5mm profile. The closes to zero the X goes is X7.729.

N25 G98
N26 G97 S4000 M3
N27 G0 X17. Z1.347
N28 X12.971
N29 G1 X12.828 F250.
N30 X10. Z-0.067
N31 Z-4.185
N32 G18 G3 X10.981 Z-4.541 R1.794
N33 G1 X13.809 Z-3.127
N34 G0 Z1.404
N35 X11.828
N36 G1 X9. Z-0.01 F250.
N37 Z-4.024
N38 G3 X10.5 Z-4.335 R1.794
N39 G1 X13.328 Z-2.921
N40 G0 Z1.404
N41 X10.828
N42 G1 X8. Z-0.01 F250.
N43 Z-4.
N44 X8.413
N45 G3 X9.5 Z-4.084 R1.794
N46 G1 X12.328 Z-2.67
N47 G0 Z1.404
N48 X10.279
N49 G1 X7.45 Z-0.01 F250.
N50 Z-4.
N51 X8.413
N52 X8.456
N53 X8.5 Z-4.001
N54 X11.328 Z-2.586
N55 G0 Z1.404
N56 X9.729
N57 G1 X6.901 Z-0.01 F250.
N58 Z-4.
N59 X7.95
N60 X10.779 Z-2.586
N61 G0 Z0.62
N62 X7.729
N63 G1 X4.901 Z-0.794 F250.
N64 Z-5.
N65 X8.413
N66 G3 X10. Z-5.794 R0.794
N67 G1 Z-8.544
N68 X12.828 Z-7.13
N69 X14.
N70 G0 X17.

[Chaz]

OK, sorted I believe. Changed from Radius to Diameter mode. Parts are now basically the right size.

[m_c]

On a lathe X should always move to positive as the tool moves away from centre.
Even on a lathe with twin turrets, the controller should be smart enough to know what direction is positive depending on what tool/turret is selected, although I think there is a bug in Mach3 when running front and rear turrets.

G0 is just a rapid move.
G53 defines machine coordinates, but it's non-modal I.e. you have to put G53 in front of every coordinate to move to machine coordinates, other wise it will default to the active tool/offset coordinates. You would typically use a G53 for the tool change location move.

[m_c]

And pick either diameter or radius mode. Don't keep switching between them, as that's when you're far more likely to make a mistake.

[Chaz]

On a lathe X should always move to positive as the tool moves away from centre.
Even on a lathe with twin turrets, the controller should be smart enough to know what direction is positive depending on what tool/turret is selected, although I think there is a bug in Mach3 when running front and rear turrets.

G0 is just a rapid move.
G53 defines machine coordinates, but it's non-modal I.e. you have to put G53 in front of every coordinate to move to machine coordinates, other wise it will default to the active tool/offset coordinates. You would typically use a G53 for the tool change location move.

Thanks. It's working now. I reversed X.

[Chaz]

Can anyone help with some G Code in the toolchange Macro please?

Mine doesnt move the turret out the way but needs to. Ideally Id like to move it to the Machine 0 position.

I found the original tool change macro that was used on my machine which contains these movement commands however the movement is not consistent (ie different directions depending on where it is, I'm not sure why).

Code "G01 x-10 F1300"
Code "G0 z-10"

I tried to do G53, cant do this in MachTurn.

I then tried G28 which works however it also tries to 'home' my turret rotation axis, which is not correct.

How do I simply tell the machine 'go home on the X and Z axis (only and ignore A Axis)'?

Thanks

[m_c]

I've used G53 in turn, but never in a macro.

I always do the tool change position move in G-code, as it gives you more flexibility, and allows you to cut down on wasted travel.

[Chaz]

I've used G53 in turn, but never in a macro.

I always do the tool change position move in G-code, as it gives you more flexibility, and allows you to cut down on wasted travel.

Thanks. So you edit your G Code to 'manually' move the turret? Problem is, G53 doesnt work in Turn for me. Tells me its not supported.

How else could I tell the machine to go to (machine) home on X and Y only?