Thanks for the input Ron yes that is the plan. I have and am familiar with Mach3 and will migrate to Mach4.?

I have a machine that was working fine. Doing x axis test 0 to 200 and back no problems. Y axis however gain or lost 0.1 to 0.3mm randomly. Problem was dirty linear bearing and some evidence of the problem was? visible by a score line on the guide rod. Loosen the guide rod rotated it and repeated the test. Score mark appeared again. Hope this helps

All solid
Also, whatever the error is, it is on BOTH X & Y axis.
Almost like there is a scaling factor somewhere

If you are going to convert why not come up to the latest and use mach4. It runs plasma fine, as well as mill and turn.

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I am starting to convert my Plasmacam to run MACH3 plasma. Is everybody happy using Mach3 as a plasma machine?

I have a 3 axis router (dual X) running ballscrews.
It has work fine for a few years now, but started to cut off-size, and in consistant
Doing a steps/mm check over 1m, and accuracy is better than 0.5mm - This is repeatable
However, when I try to cut simple squares 25mm, they measure 25.6
If I do parrallel cuts at 25mm spacing, some are 24 some are 26 (almost like every second cut is offset by 1mm)
Re-test the 1m and still accurate.
This is new, and Im totally confused !
Can anyone help please

Thanks

Drew

I have a simple g-code file that I generated using both FreeCAD (headset 6.nc) and MeshCAM Ver 5 (headset 5.nc).? FreeCAD does not have a Mach3 specific post processor so I used LinuxCNC as the target. MeshCAM does have a Mach3 post processor and that is what I used.? Both versions simulate perfectly using NC Corrector Ver 4.? Both version also fail to run with Mach3 with the following error message:? "Radius to end of arc differs from radius to start"? The error is produced by the first G1 command in each version which is line 12 in headset 5.nc and line 20 in headset 6.nc.? Does anyone know why I am getting this error and how I might fix it?? I thought it may be a rounding problem but both versions are accurate to 4 significant digits.? Note also that FreeCAD currently only generates g-code in metric units which is why the numbers are larger.??

Thanks,

Sam Monaco

If you are using the standard screens, try clicking on the thin REF ALL HOME button as well
as the ZERO buttons. I saw some weird offset problems once till I did this.

Regards,
Les Grant.


On 29 Nov 2019 at 7:46, Richard Wize wrote:

Thanks for the response.? I looked in my Config > Tooltable and it is completely "Empty"

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Grantronics Pty Ltd Int'l: +61 2 9896 7150
ABN 46 070 123 643
45 Monash St, Wentworthville. NSW. 2145. Australia.
mailto:info@...
Microcontroller Hardware and Software development:
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o Logical Systems Programming, Prototyping & Production Adaptors
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On Fri, Nov 29, 2019 at 12:31 PM, Richard Wize wrote:

G00G43Z1.8000H2

Delete the line of code? G00G43Z1.8000H2.
Dan

Thank you!

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You have a line?G00G20G17G90G40G49G80 that turns off the tool length compensation in Mach 3. ?

I thought it might be Aspire, but if I reset Z zero a 2nd time after changing the bit (after I've already done one Z zero and the program runs off by 1"), I then close the G Code and re load it and then the program runs fine,? therefore I'm thinking it has something to do in Mach 3?

Does this help?? It is the Profile Cut rhat wants to go 1" lower than Z zero when I first run the program after setting Z zero;

( Profile Cutouts .25_ DC EM )
( File created: Friday November 29 2019 - 03:29 PM)
( for CNC Roter Parts Machines )
( Material Size )
( X= 19.000, Y= 7.000, Z= 0.750)
(.IMPORTANT: Before outputting any toolpaths you)
(should carefully check all part sizes and the material)
(setup to make sure they are appropriate for your)
(actual setup.You should also check and re-calculate all toolpaths)
(with safe and appropriate settings for your material, )
(CNC machine and tooling.)
(Terms of Use: This Project and artwork is provided)
(on the understanding that it will only be used with)
(Vectric software programs. You may use the designs)
(to carve parts for sale but the Files and/or Vectors,)
(Components or Toolpaths within them {or any)
(derivatives} may not be converted to other formats, sold to,)
(or shared with anyone else.This project is )
(Copyright 2019 - Vectric Ltd.)
(Toolpaths used in this file:)
(Profile Cutouts .25" DC EM)
(Tools used in this file: )
(2 = Down-Cut Bit 1/4"??????????????? 57-910)
G00G20G17G90G40G49G80
G70G91.1
M07
G00G43Z1.8000H2
S12000M03
(Toolpath: Profile Cutouts .25" DC EM Tool: Down-Cut Bit 1/4"??????????????? 57-910)
G94
X0.0000Y0.0000F90.0
G00X7.2500Y3.7952Z0.2000
G1Z0.0000F90.0
G1X7.2556Y3.7951Z0.0000
G1X7.2612Y3.7947Z-0.0001
G1X7.2670Y3.7941Z-0.0001
G1X7.2727Y3.7931Z-0.0001
G1X7.2786Y3.7919Z-0.0002

The tooltable has no tools entered and no inputs.

?I helped another customer that had Aspire and the problem was with the setup info in Aspire. Can you post the first 10 lines of the aspire G code . That may give us the clue to what the setting problem is.
Dan