Messages

1

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 14, 2017, 11:21:23 AM »

Hi,

The files posted in reply #22 was my attempt to solve the assignment that you, Rich, gave me in reply #20; the files run fine here, too. So I guess I can say that with the original posted info, there never was a problem.

I have a number of .nc-files that run fine.

However, I have a vast number of .nc-files which in Mach3 open with crop circles. They're all exported as .dxfs [dxf-option: R12 _ natural] from Rhinoceros, opened in CamBam in which they are processable and editable [profiles, drills, holding tabs etc]. Toolpath generated, then Gcode.

I can say with some certainty that the problem is not with Rhinoceros, since I have .nc-files done this way, who have no crop circles. And the .dxfs when opened i CamBam show no sign of crop circles, neither the ones that turn out to run fine in Mach3, nor the ones that come up with crop circles in Mach3.

I am sorry that I have sent a wrong .dxf-file, the correct one in relation to the screenshot in #25 you find attached to this post.

We are on the same level here: You have opened the .nc-file and you have experienced the crop circles, although both the Gcode had G91.1 in the prior section, and Mach3 was set to Incremental, right?

Is there any way that Mach3 can assume another IJ mode setting than the one that shows in the Gcode, is there any way that those crop circles are produced by some other instance than the G91.1/G90.1//GenConfig >IJmode:Absolute / Incremental setting?

best regards
Anders

2

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 13, 2017, 01:14:52 PM »

Hi Rich tried to swap to v. 062, same thing

3

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 13, 2017, 11:51:21 AM »

Hi again,
@ Rich:
I will definitely try and rum version 062, thank you.

@Tweakie:

Have a look at the attached photo.
To the left in the mauvegreen field the Gcode in digits, and in the line with the setting of this specific Gcode: G91.1.
Below the General configuration window: IJ mode : Incremental
And in the toolpath window behind: Crop circles.

The photo is taken just after launching Mach3, nothing has been meddled with.

I also attach a copy of this specific code.

Along with a dxf of what I want Mach3 to show/ cut.

?

best regards,

Anders

4

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 11, 2017, 10:45:00 AM »

I have of course been through every aspect of the Machining > Arc Center Mode, set it to default + set the postprocessor to Mach3, set Arc Center Mode to absolute, set it to Incremental CP1, P1C etc.

Just before I thought I have solved the problem and let the machine run an nc file, it made all the drill holes in my design, then set off to make a perfect arc all the way through a sheet of 2440 x 1220 x 21 plywood, and would have continued off the table if I had not stopped it. Reason that I thought I had solved it was that there was no toolpath showing, but neither any "Radius to end of arc differs from radius to start" message. Maybe there's a graphics card problem also...

The nc files (the Gcode that CamBam makes) with the crazy loops are in size about 150 KB to 400 KB, my PC has 1GB RAM.

The successful nc-files are way smaller , less than 50 KB

5

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 11, 2017, 10:38:13 AM »

Hello Rich,

I am using Mach3 version R3.043.066

I am using CamBam Plus [0.9] Rel 8P.

You'll have the dxf and the gcode in a sec.

(Hitherto I have produced the dxf in Rhinoceros, exported it with R12 Natural Export dxf mode, and the drawing appeared unchanged in CamBam, have been able to do holding tags etc. in CamBam on it). And I have done several dxfs that just worked all the way, this way.

best regards

Anders

6

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 11, 2017, 04:53:41 AM »

Here's also what:

I changed the Arc Center Mode setting for the MOP in the CAM programme to Absolute, then generates Gcode from the design, and loads it into Mach3.

In Mach3, the General Config > IJ mode is changed to Absolute, all by itself. But still those crazy loops.

7

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 11, 2017, 04:35:59 AM »

Hi Tweakie,

I am afraid that just to swap G91.1 for 90.1 in my Gcode will not make it work.

As I wrote in my last post, doing that makes Mach3 say "Radius to end of arc differs from radius to start", and seemingly there's no change to the crazy loops toolpath.

I had this from a different source:

"That definitely looks like the wrong IJ mode to me but you are really the only that can say for sure. I also wonder if there was a G2 or G3 that wasn't canceled when it should be?

Neither the distance mode nor IJ mode setting in Mach3 general config will make any difference (a G90, G91, G90.1 or G91.1 executed through Gcode overrides their relevant settings in general config) at all as long as the Gcode sets the correct mode as needed. Which it should because the Gcode is what determines what the right mode is. Well, ultimately that decision comes down to the programmer (the one writing the Gcode) and what they want the machine to do."

Can I ask you about this? If the CAM programme Gcode overrides Mach3 settings then changing the G91.1 for G90.1 in the Gcode would give the outcome that Mach3 changes it General Config> IJ mode setting. But how can I prevent Mach3 from making the crazy loops if I cannot change Mach3's "reading mode" of the Gcode?

best regards

Anders   

8

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 10, 2017, 11:02:13 AM »

I wish to add that if I
1) change every line with the G 91.1 (there is but one) to G90.1, and
2) ensure that the General Config > IJ mode : Absolute,  then Mach3 tells me "Radiius to end of arc differs from radius to start", - however this message seems to block Regen Toolpath, so I cannot 'see what's wrong'.

And if I
1) change the general Config > IJ mode to Incremental
2) change the line G90.1 to G91.1 in the gCode made by my CAM programme  (that's actually the default mode of my CAM programme), I get crazy loops.

From your experience, is it possible just to swap between G91.1 and G90.1 in both the Gcode and the Mach 3  General configuration, and that's all there is to it?

best regards

Anders

9

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 10, 2017, 09:45:11 AM »

I did as you suggested, and now I get "radius to end of arc differs from radius to start", but at least the loops disappeared from the Toolpath screen., hehe.

By looking around I've gathered that this is Mach3s expresion in words of the IJ mode problem?

I also have a yellow button on the mach3 screen bleow the Toolpath screen that says: "Abnormal Condition". When I click it says:

"One or more axis are enabled or disabled
IJ mode is absolute
Currently in metric units"

Does this say you anything?

best regards
Anders

10

Mach3 under Vista / Re: Mach3 Axis Calibration Mystery

« on: April 10, 2017, 08:02:38 AM »

Hello,

I have tried to do as you say, go to Config > General Config, change the IJ mode from Incremental to absolute and vice versa, whenever those loops appear. And after each swapping regenerated the toolpath window, to no avail.

The gCode of CAMBAM is set to default... here's the prologue in the beginning of the gCode string. With a gCode, like that should the IJ mode be incremental or Absolute, and should the Distance mode be Inc or Absolute?

( Made using CamBam - http://www.cambam.co.uk )
( WOODWAVY SECTION 1B R12 NAT 3 CAMBAM singular 2 4/10/2017 1:47:43 PM )
( T0 : 0.0 )
G21 G90 G91.1  G40
( T0 : 0.0 )
T0 M6
( WOODWAVY SECTION 1B R12 NAT 3 CAMBAM singular 2.nc )
( Made using CamBam - http://www.cambam.co.uk )
( WOODWAVY SECTION 1B R12 NAT 3 CAMBAM singular 2 4/9/2017 10:23:03 PM )
( T0 : 6.0 )
G21 G90 G91.1  G40
G0 Z3.0
( T0 : 6.0 )
T0 M6
( Profile2 )
G17
M3 S1000
G0 X4.9207 Y1153.611
G0 Z1.0
G1 F300.0 Z-0.4
G1 F800.0 Y1135.4444

Do you have any other ideas?

best regards

Anders