Messages

1

General Mach Discussion / Changing feed rate

« on: June 14, 2017, 05:01:36 AM »

Can someone advise if theyre having the same problem. When just running along a straight path (so y not changing) the feedrate varies quite signifiicantly? The feed you can see is changing all of a sudden from fast (1000mm) to slow (300mm) and then back up again  and the same when x isnt changing???

2

General Mach Discussion / Coordinates change

« on: August 11, 2016, 07:34:32 AM »

I can't understand this, after completing the gcode for a strategy it obviously returns to home x0,y0,z0. I then load the code for the next strategy which has been created with the exact same setup and run it goes to a slightly different axis than what's in the code. My only thoughts are that the motors have turned on the spindle so Mach thinks it's in a slightly different locations? I know there are times when this would happen but not during these occurrences. Please help.

3

General Mach Discussion / Re: Strange zeroing occurrence

« on: July 13, 2016, 01:28:16 AM »

Many thanks for the feedback, all sorted now)

4

General Mach Discussion / Strange zeroing occurrence

« on: July 12, 2016, 08:06:26 AM »

Once zeroing all axis' if I then press the go to zero button when away from zero it often goes to Z-5 or there abouts but if I then press go to zero again it goes to Z0. This only ever happens to Z and usually goes to very close to Z-5 but always goes to exactly Z0 when I press go to zero again.

This makes this function almost useless as it crashes the bit into the zero if there is material there.

Please help suggest why this would be?

5

General Mach Discussion / Re: Z movement

« on: June 19, 2016, 08:01:12 PM »

Will do, thank you so much.

The previous occurrence in strange though

6

General Mach Discussion / Re: Z movement

« on: June 19, 2016, 01:30:35 AM »

Ok so this got me totally stumped. I checked and there were no values in the tool length offset table but this is where it gets weird. I ran the original Gcode that was used to cut the stock just to see where the controlled point went (I knew it was safe as all the material was already removed) but it went to a lower Z point and I knew that it hadnt done that before so I put the original flat end mill back and rezeroed. Now it followed the path I expected.

So this is where it gets weird.... I lifted the spindle roughly 20mm as that was the additional length of the spot drill I was using for the chamfer operations before putting the spot drill back. Now everything works fine so the original question is no longer needing answering. But why on earth would this happen??

7

General Mach Discussion / Re: Z movement

« on: June 18, 2016, 10:21:42 AM »

And isn't tool offset relating to the tool radius?

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General Mach Discussion / Re: Z movement

« on: June 18, 2016, 10:02:38 AM »

...
I attached a pic showing where the tool was around the same location as in the DRO's so I think thats right but how is it when I zeroed the tool before running the Gcode plus it was fine for all the previous strategies used to machine the part?

9

General Mach Discussion / Z movement

« on: June 18, 2016, 04:43:58 AM »

Ive been lucky enough to have good suggestions here in the past and would really like to clear this up.
Im trying to do a chamfer and I know the chamfer width and chip offset is correct but I dont understand Gcode enough to know why it keeps moving down to around z-7 when Im expecting it to go to around z-3. Ive attached a screenshot to illustrate. I can only see z-2.8 which sounds about right but you can see by the DRO that its actually at z-6.9 so why is that??

10

General Mach Discussion / Re: Very frustrated

« on: May 19, 2016, 06:24:19 AM »

Cheers