Messages

1831

General Mach Discussion / Re: Work offsets 101 ;)

« on: April 11, 2016, 04:41:34 PM »

Hmm, i tried adding it to the process list in sheetcam, last item after all the cuts etc and this is the end code from a job...

N27150 (Operation: Insert code snippet Code: Apply Standard Offset G54)
N27160 G00 Z20.0000
N27170 G54
N27180 G00 X87.7841 Y384.6574 Z20.0000
N27190 X0.0000 Y0.0000
N27200 M05
N27210 M05 M30

Seems it is calling G54 as needed but it then issues move commands which would be in the wrong offset - this is wrong is it not??

Yes a post edit may be needed??

1832

General Mach Discussion / Re: Work offsets 101 ;)

« on: April 11, 2016, 04:32:42 PM »

Yes that would work, ta.

There is no default in sheet-cam as that would be better - no chance of forgetting then but this will work.

1833

General Mach Discussion / Work offsets 101 ;)

« on: April 11, 2016, 03:44:35 PM »

Is there a way to have Mach set G54 at the end of each job?

My reason -

I have a production part, uses a small fixture that is always mounted in the same place on my mini-mill so it seems setting G55 as my work offset makes sense.

AFIK Mach always uses G54 as the default work offset, which is fine, but once i run my parts (which call G55 at the start of the code) it will remain in G55 so forgetting call G54 again will create a mess??

So, is there a way to default back to G54 after each run so it reverts to a safe condition for other jobs??

Of course, if I'm going about this backwards then please let me know but this makes sense to me so far

1834

General Mach Discussion / Re: is this stepper big enough?

« on: April 10, 2016, 11:46:47 AM »

Looks like a Nema23 3Nm motor with those dimensions.

A direct drive to 5mm ball-screw would likely work.

1835

General Mach Discussion / Re: is this stepper big enough?

« on: April 10, 2016, 09:47:04 AM »

Can't see the motor

Can you also post the dimensions of said motor?

1836

General Mach Discussion / Re: Wiring Z Zero Plate to BOB

« on: April 08, 2016, 02:46:44 AM »

I have done both on my mill - grounded the 0v on the BOB inputs to the chassis and used the input connected directly to the plate, seems happy with it and only have the plate to position before probing.

I check the plate works every time though with the on-screen LED;)

1837

General Mach Discussion / Re: 2010 Screen-Set go to zero

« on: April 03, 2016, 02:35:17 PM »

Ok, thanks, wasn't sure if it was a macro call.

1838

General Mach Discussion / Re: 2010 Screen-Set go to zero

« on: April 03, 2016, 02:14:16 PM »

Possibly, I thought my safe z was zero, will have to check it.

Thanks

1839

General Mach Discussion / 2010 Screen-Set go to zero

« on: April 03, 2016, 01:11:09 PM »

On the excellent 2010 scree-set goto zero's button, is it possible to edit the commands ?

I find it does Z first which can be dodgy with fixtures etc in the way, would be good to lift Z then move the X & Y

1840

General Mach Discussion / Re: PWM output...

« on: April 01, 2016, 02:56:34 PM »

SUCCESS!

I changed the VFD from the Huanyang to a UK Schneider Altivar12 unit.

It measures correctly now, the motor sounds better, smoother, draws less current. Sensorless-Vector seems to be unstoppable even at 100rpm!

According to the tech guy at the suppliers, with sensorless-vector drives it is 100% vital to run an auto-tune sequence once all the parameters are set.

I also managed to calibrate the speed to Mach3 successfully

In the end, all it took was taking the minimum spindle pulley to -6500 and max to +24000 - I now have usable calibration from 5,000 to 24,000 rpm to within 200 rpm.