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Mach4 General Discussion / Mach4 engraving CNC laser machine missing steps and regaining them ...?

« on: July 18, 2018, 03:22:57 AM »

Hi all,

I'm having some problems with my CNC machine.

I have attatched a picture of some engraving work.

You can see in the circles that sometimes there is a wierd space between some of the letters.
It seems to be always to the X- direction,  but the sapce is not always the same.   Looks like missing steps to me, but the strange thing about it is that the name he does next is in the place it should be, and with no spaces ....

the Gcode seems to be fine when i generate it in Aspire 8.5  and also when i load it into mach 4


Anny idea's on this ?

Thanks,
Bart

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Mach4 General Discussion / part damaged when rotation axis mach4 (Rot 360 rollover and; Short Rot on G0)

« on: March 16, 2016, 04:09:51 AM »

Hi,  i'm having problems with my machine when i use G-code generated by Deskproto 6.1.

I got feedback from the developers of desk proto and they said i need to change the settings:  Rot 360 rollover and Ang Short Rot on G0 in my mach3,  the problem is I use mach4  and i don't find  a setting like this.

Here is the problem and solution from the FAQ at deskproto:

 My part is damaged when rotation axis machining on a Mach3 driven machine.
It seems like some of the rotation axis toolpaths are incorrect, though on the DeskProto screen all looks fine. This problem may be caused by an optimization setting in Mach3.
Please check dialog "General Logic Configuration" of the Mach 3 Software. On this (huge) page you can find a section "Rotational" with two checkboxes, called "Rot 360 rollover" and "Ang Short Rot on G0".
If one of these options is checked this may be the cause of the error.
Here is what the Mach3 manual says about these two options:
Rot 360 rollover: if checked, it will measure a rotary axis modulo 360 (0 to 360 then restart at 0). Otherwise, it will keep counting up (for example, two revolutions would be 720).
Ang Short Rot on G0: if checked, it makes any rotary axis treat the position given as an angle modulo 360 degrees. Moves will be by the shortest route to that position. For example, if the axis were at 0 degrees and a request was made to rotate to 359 degrees, it would rotate -1 instead of +359.
The Rollover option introduces an extra movement to A=0 for every A-movement, which may destroy your part (and will take very long).
The Ang Short option needs to be unchecked as well: rotating via the shorter route may destroy your part, as DeskProto checked only the route that was prescribed.

The only related settign i can see in mach4 is in general config: rotary axes: rollover A ;B and C   i have rollover A checked...
Is this that settign or ....?

thanks,
bart