Messages

1821

General Mach Discussion / Re: Tool moving to random coordinates

« on: April 16, 2016, 07:08:41 AM »

One thing I learnt was that anything is possible

It will (usually) do exactly what you tell it, whether that is right or not is another matter

1822

General Mach Discussion / Re: Tool moving to random coordinates

« on: April 16, 2016, 03:11:09 AM »

Sounds a bit like you were mixed relative and absolute moves - you tell it G0 X10 and it moves 10mm not to X10 itself??

1823

General Mach Discussion / Re: Couple questions about Limit and Home switches

« on: April 13, 2016, 02:19:42 PM »

Yes - the machine is in a position that argues with your soft limits settings

with my machine axes at bottom left and X & Y homed, machine co-ordianates will now be X0 / Y0, soft limits min is X0 / Y0 and slow-down zone is 15mm on both. X max is 348mm Y max is 448mm, my limit switches are at X 350mm and Y 450mm

With this setting I can zoom around the table and it is impossible to hit a limit switch, as long as the table is homed first.

Z is a little different as home is fully up and Z0, so soft limit Z min is now -150mm and Z max is 0mm.

Tune the slow-down to suit your table - speeds will affect the size of the zone needed to slow enough at full rapid jog speed.

Once set, jog to a mid position, enable soft-limits and should be good to go.

1824

General Mach Discussion / Re: Work offsets 101 ;)

« on: April 13, 2016, 01:41:14 PM »

Ok, I think i'll pass on work offsets at the moment.

I tried it tonight, with the G55 call in the start of the code, but it seems you need to be in G55 BEFORE you perform top-of-material sensing ??

I did not try a run because the numbers on the DRO's looked wrong to me and i didn't want waste a cutter and material.

I was also getting Soft-Limit on Z warnings when pressing cycle start so something was certainly wrong.

Clearly I do not understand offsets yet So i have resorted to writing down the X & Y offset for the job and just doing G0's to there and zeroing out the respective DRO.

After switching back to G54 and doing this it all worked as normal.


Back to school

1825

General Mach Discussion / Re: Specify machine coordinates

« on: April 13, 2016, 05:37:08 AM »

Sounds like you are typing into the DRO box?

That will not create a move.

You need to be in the MDI line, try typing something simple like G0 X10 which should move your X axis to the point that reads 10mm on the work co-odinates, if you zero the work position first then type this it will simply move X 10mm positive.

1826

General Mach Discussion / Re: Couple questions about Limit and Home switches

« on: April 12, 2016, 02:12:24 PM »

 
Setting the de bounce worked, it now finds home and then move's off the switch.  Thanks.  Now if it could do that on the opposite end when it hits the other limit switch that would be nice.

Get your soft-limits setup and you won't hit the far limit swiches

1827

General Mach Discussion / Re: Z axis Problem

« on: April 12, 2016, 08:40:04 AM »

I'm just learning this screen set too but have seen this, It has something to do with the Z clearance plane setting and the position of the z when it touches the plate, is the material or part much thicker than usual?

I think its triggered when the z touch is higher than the setting in clearance plane box in settings tab.

It is trying to lift the Z to the clearance plane position but the distance left in z travel is less than the setting height - so you get "Z clearance plane is above z axis home switch"

My z axis home is at the top which in my setup is machine co-ord Zero, my clearance plane is 60mm and the message pops up if the height sensed does not leave at least 60mm above the part.

1828

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

« on: April 12, 2016, 06:56:46 AM »

Usually 200 steps per rev, but there are other flavours but my guess is 200.

1829

General Mach Discussion / Re: Work offsets 101 ;)

« on: April 11, 2016, 04:52:15 PM »

Sorted then, thanks

1830

General Mach Discussion / Re: Work offsets 101 ;)

« on: April 11, 2016, 04:45:33 PM »

Post edit seems better, now looks like this...

N27150 G00 Z20.0000
N27160 X0.0000 Y0.0000
N27170 M05
N27180 M05 M30
N27190 G54

Should it be before the M30??

Edit...

N27160 X0.0000 Y0.0000
N27170 M05
N27180 G54
N27190 M05 M30

Better ?