Hi Richard

Look up the G52 code and see if that is what you want.

I think you have done some programing so shouldn't hurt your head too much. Gave me a headache

Cheers Michael

From wikipedia

Do you want to just change the displayed XYZ? If so you can just click on the displayed number to select it and type in any value you like…

First you need to home each axis I assume you have home/limit switches, so that mach3 knows its starting point. Then move each axis to where you would like it start from ,at this point zero the axis, when you have done this on all three axis, you can use "GOTOZ" to move  to that point from any other position

Edited By Phil Morris on 15/06/2015 21:01:21

Oops! After homing and then zeroing to a position on the work should say the machine operates in work coordinates…

That picture/jpg actually disappears below the advert for me so I have done a drag/copy/paste

Temporarily shifts program zero to a new location. It is simply "an offset from an offset", that is, an additional offset added onto the WCS offset. This simplifies programming in some cases. The typical example is moving from part to part in a multipart setup. With G54 active, G52 X140.0 Y170.0 shifts program zero 140 mm over in X and 170 mm over in Y. When the part "over there" is done, G52 X0 Y0 returns program zero to normal G54 (by reducing G52 offset to nothing). The same result can also be achieved (1) using multiple WCS origins, G54/G55/G56/G57/G58/G59; (2) on newer controls, G54.1 P1/P2/P3/etc. (all the way up to P48); or (3) using G10 for programmable data input, in which the program can write new offset values to the offset registers. Which method to use depends on shop-specific applic

I think there was a discussion once on the Mach forum about this and I "think" the conclusion was you should home occasionally because the difference from home zero to work zero can reach a very high number eventually and this can cause Mach problems.

Richard if your machine is heading off to the coordinates you type in the DRO box then Mach not working as expected

you should check your USB port is not shutting down due to power management this can cause issues.

What Version are you running?, I have a mate who was in a similar position to you, he had no end of problems, I installed an earlier version of Mach 3 and pretty much all is issues went!!, I think when Brian took over the code writing from Art some things changed for the better but stability suffered and a few bugs where introduced and never addressed, in part I think because they concentrated on the new version rather than fix what they had, there is still an issue with programmed feed rates and actual feed rate on later versions, it appears the system tries to run all axis interpolation at the fastest axis speed and shows this value, rather than slowing the fasted down to match the slowest and showing the true achieved feed rate, I've raised this on the Mach forum with little or no response, I've been using version 2.60 for over five years and only ever had one crash due to software issues this I solved by turning off the cutter path display before running any code, some of my Gcode programs run for more that 24 hours with well over 10mb per file.

HTH

Shaun

yep that version seems to me to be full of inconsistencies, if I install that on my Mill it becomes very unstable, with the older version I can run 3 mpm cutting figure of eights, and a full cup of coffee doesn't spill, the movement is so smooth, however install the later version and it becomes a different animal, I've spent ages retuning the Servos to no avail, I gave up in the end a reinstalled the earlier version.

My PC was found in a skip, is 1Gig CPU with 3Gig ram, a very basic video card a 10 gig HD, running a standard install of XP pro and two printer ports, however my VFD is LG, its in the same box as the controllers and PC, I have Planet Rock playing on the radio which is sat on top of said box, whilst the miller is taking a 4mm depth of cut with 8mm stepover at 900mmpm in 7075 ali, as of today according to the run time clock, I have run well over 9,000 hrs with this setup, I have no line filters and no problems!!

Shaun

Edited to add, I also have a cheapo Huanyang inverter on my lathe, which is next to the miller this doesn't effect the CNC mill either, although I rarely run them both at the same time.

Edited By Involute Curve on 16/06/2015 13:25:46

I can't remember which version I'm running but it's been quite stable on my mill but my router can lock up seemingly at random, might try the older version.

Steve

John.

Where can I download version R3.041 / 042 ( I can't see them on the FTP site ) At the moment I'm running on R3.043.038 as any later one's seem to have the problem with the requested speed and actual spindle speed been incorrect.

Thank you

Ian