Messages

1801

General Mach Discussion / Re: Wanted outline/3D image file of a horse

« on: December 23, 2007, 03:54:37 PM »

Please do, or email it to me.

Thanks

Graham.

1802

General Mach Discussion / Re: Wanted outline/3D image file of a horse

« on: December 23, 2007, 03:27:58 PM »

2D or 3D, 3 is better I suppose.

Graham.

1803

General Mach Discussion / Wanted outline/3D image file of a horse

« on: December 23, 2007, 03:21:21 PM »

I am looking for a horse or horse head dxf or iges file.

Anybody got anything they would like to share?.

Graham.

1804

General Mach Discussion / Re: Non-parallel (rotated) datum

« on: December 21, 2007, 12:01:45 PM »

With you now, you want 3D jogging.

You could ask    but I think not   

Graham.

1805

General Mach Discussion / Re: Non-parallel (rotated) datum

« on: December 21, 2007, 11:48:46 AM »

You can feed between 2 points on 2 different fixture offsets.

e.g.

G54 G00 X0 Y0 Z1.
G55 G01 Z2. F100.

If its any good to you ?

Graham.

1806

G-Code, CAD, and CAM discussions / Re: DFX to G Code

« on: December 21, 2007, 06:32:35 AM »

Hi Don,

I think the .NC files will be text based g-code files.  The best thing to do is ask them for a sample .NC file and post it here for us to look at.

Graham.

1807

G-Code, CAD, and CAM discussions / Re: Code for Gang Tooling

« on: December 18, 2007, 04:52:55 PM »

Have you got the tool changer setting set right in the general config, it sounds as if you have it set to stop and wait for cycle start.

If thats not the problem then why not post your code and lets pull the bones out of it.

Graham.

1808

General Mach Discussion / Re: Machine Coordinates ????

« on: December 16, 2007, 06:45:02 PM »

Look under Config/Motor Softlimits and see what the G28 home positions are set to.

Also under Config/General bottom right of window un-check copy G59.253 to G54

Graham.

1809

General Mach Discussion / Re: Trouble cutting accurate parts

« on: December 15, 2007, 01:41:45 PM »

If it is a mechanical problem then it would not show in the DRO's.

If you tell Mach to move 1.000" then the DRO will show 1.000", the only time this will be different is if you are using compensation of some kind.

Backlash compensation is applied on the start of the move and is not shown on the DRO's

Even on a servo system Mach has no idea if the mechanics are moving.  It just counts pulses out.

What is in your start up line on the config page?

Graham.

1810

General Mach Discussion / Re: Changing tool offsets

« on: December 15, 2007, 01:08:32 PM »

The proper way to set multiple tools is like this :-

Get into the habit of setting G54 or G55 or G56 etc.

The benefit of this is not realised until you try it. The biggest benefit is that the datum of the job can be moved with ease.

Set G54 X and Y axis to datum point on job.

Your Z axis datum is set by tool 1 or your datum tool e.g. a probe.

Touch your datum tool on top of job.

Set G54 Z to the reading in the Z axis machine dro

Zero out on top of job with above tool.

Load next tool.

Your tool offset is the difference in length between the datum tool and this tool.

Touch on same face, the reading in the Z dro is the offset of this tool, enter this in the offset table for this tool.

Repeat above line for all tools.

If more material has to be removed from face of job then the machine Z datum needs to be moved down. e.g. increase the value of Z in G54 fixture offset

Note

if your datum tool is not the first cutting tool then tool 1 will have an offset, if tool 1 is your datum tool then it will have an offset of zero.

Graham.