Messages

1

General Mach Discussion / Re: Tangential Problems

« on: September 17, 2014, 07:36:00 PM »

Sorry for the monologue!

Unckecking the Ang Short Rot on G0, seemed to do the trick, it takes a little more time to get to the desired angle but I can Live with that.

2

General Mach Discussion / Re: Tangential Problems

« on: September 17, 2014, 07:20:39 PM »

Ok that fixed the feed rate but I found another problem which I manually fixed:

Here is a Gcode snip of the test file I am using
N0010 (Filename: New.tap)
N0020 (Post processor: Mach3 tangential.scpost)
N0030 (Date: 17/09/2014)
N0040 G91.1 (incremental IJ mode)
N0050 G20 (Units: Inches)
N0060 G53 G40 G90
N0070 F1
N0080 (Part: New)
N0090 M6 T4  (Fresadora/Router, 0.01 in Diámetro)
N0100 G43 H4 F100
N0110 M03 S1000 F100
N0120 G00 X5.5118 Y4.3307 Z0.3937
N0130 A0.0000
N0140 Z-1.0000
N0150 G03 A-360.0000 I2.3622 J0.0000 F100.0
N0160 G00 Z0.3937
N0170 X4.9917 Y3.6423
N0180 A71.6312
N0190 Z-1.0000
N0200 G03 A-288.3688 I0.0744 J-0.2242
N0210 G00 Z0.3937
N0220 X5.1405 Y5.4671
N0230 A108.3688
N0240 Z-1.0000
N0250 G03 A-251.6312 I-0.0744 J-0.2242
N0260 G00 Z0.3937
N0720 M05
N0730 X0.0000 Y0.0000
N0740 G49
N0750 M05 M30

Mach 3 seems to skip lines 130, 180, and 230, which are G0 moves of A, The weird thing is that the A axis moves to the position called for in the following line for example when line 180 calls for A to move to 71.6312, it instead moves to the position called for in line 200 which is -288.3688, so that when it actually goes to that line it does the arc but not the A axis movement.

What I did was to add a G1 on lines 130, 180, 230, etc... and now the A axis moves to where it is supposed to move.

Any ideas on why G0 moves of A axis are being skipped?
best Refgards
Fernando

3

General Mach Discussion / Re: Tangential Problems

« on: September 17, 2014, 06:47:24 PM »

WAIT!!!
Sorry Gerry, but that DID do it. didnt restart mach3, but now it works... Looks like Im buing a sheetcam license soon.
Thanks I love this place

4

General Mach Discussion / Re: Tangential Problems

« on: September 17, 2014, 06:35:58 PM »

Hey Gerry,
nope, that didnt do it.
Im just not sure mach3 can handle an arc with a rotational move within the same line, as the gcode reference button in mach3, this lines are very rarely coded.

5

General Mach Discussion / Re: Tangential Problems

« on: September 17, 2014, 06:11:37 PM »

Just tried the code generated on sheetcam with the tangential postprocessor on another pc hooked up to my mill, code is correct but Mach is unable to process the file at full speed.
It seems it has trouble running lines like this
N0160 G03 X3.7987 Y0.4022 A269.2359 I0.2249 J-0.0000 F100.0
It does the move it just does ir REALLY slow.

Remove the A axis part of that line and it does the G03 move correctly.
I wonder if a smoothstepper will take care of that problem... I have one in coming in the mail but it will be a while before I have the control cabinet done. I will give it a try without anything hooked up.

6

General Mach Discussion / Re: Tangential Problems

« on: September 17, 2014, 04:08:43 PM »

Hey Tweakie,
I just tried the trial version of sheetcam, it has a postprocessor called mach3 tangential that posts A axis movements.
Im attaching a test file I made, it seems to do what we are looking for it to do, the only thing is that Mach3 seems to have problems running the gcode at normal feed speeds and it moves really slow, at least with no machine attached to the pc (i dont have it ready yet).
You think you could give it a try to see if its just me or a mach3 problem in general? It has a 1" depth of cut so that I could see if the A axis was turning before clearing the material.

7

General Mach Discussion / Re: Tangential Problems

« on: September 17, 2014, 12:58:10 PM »

Thanks Tweakie,
Do you have the same problem when cutting a rectangle with rounded corners, when the cutter starts on one of the sides, transitions to the curve and after that when starting the next straight line (the knife is aligned) it slows down and the knife starts turning in the wrong direction while moving on the straight line. This happens to me when the rounded corners are arcs.
Good to be back here, its been a while

8

General Mach Discussion / Re: Tangential Problems

« on: September 17, 2014, 10:18:03 AM »

Im just setting up a tangential cutter on a new CNC table im doing, and I noticed this doing simulations on Mach and my cam software. Anyone able to tell why or how to avoid this?
This happens to me on a square toolpath with rounded corners.
I was able to post the toolpath with no arcs only small G1 moves and it appears to do what it is supposed to do, But I like G2/G3 better.
Hope anyone came up with a solution
Best Regards
Fernando

9

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: May 23, 2012, 10:37:33 AM »

Thanks guys

10

Show"N"Tell ( Your Machines) / Re: The Laser Project.

« on: May 22, 2012, 05:34:02 PM »

Hey Tweakie,
quick question, do you know if a sealed Co2 laser 200w can cut metal?
Do you know which metals and what thicknesses?

Thanks
Fernando