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Topics - WoodyCam

Pages: 1
1
General Mach Discussion / Swarf in Keyboard and Mouse!! Ahhhh!
« on: February 20, 2009, 12:52:12 PM »
Dear All, I'm getting really bothered by swarf in the keyboard and mouse with my CNC lathe setup (ORAC + MACH3).

Its shielded but the sharp, springy and keyboard-deadly stuff gets everywhere. I even had an unexpected event (i.e. crash :'() when a bit of swarf lodged in the side of the jog key and held it down!!

I just wondered what the more established users do to solve this problem. ;D

I'm thinking vertical keyboard with integrated roller ball - but I expect its uncomfortable to use?

Any pics, advice and suggested products greatly appreciated!

Thanks, Woody.

2
General Mach Discussion / G41 and G42 Help Request! Example given
« on: January 18, 2009, 08:21:51 AM »
Hi, I'm having trouble with tip radius comp in Mach3Turn and I'd really appreciate some help.

Tool table is set with Tool 1 as a normal DCMT tip cutting to the left with a 0.4mm radius, no offsets and "tip direction" is set to 1.

Working in Diameter mode and using R3.042.020.

My G-Code (pls. excuse my comments):

(MT2 Test Taper)
g21 (metric)
g61 (exact stop)
g18 (xz)
g90 (absolute)
g40 (off radius compensation)
g95 (mm per revolution feed mode)

T0101 M06 (Select Tool 1 data and do a tool change)
M03 S1000 (Start Spindle at 1000rpm)

G0 x0 Z3.0 (move to safe position)
G41 (Left tool tip compensation, rad is from the tool table for tool 1)

g1 x0.0 z0.0 F0.1
g1 x8.0 z0.0
x10.0 z-1.0
x10.0 z-10
x12.53 z-10.0
x14.53 z-11.0
x17.78 z-76.065
x17.78 z-78.72
x19.0 z-79.5
x19.0 z-97.0

G40 (off radius compensation)
M05 (Stop Spindle)
M30 (End and Rewind)

If I remove G41, it shows the profile I want in the path display, but it won't cut the right size as the G1 points are the finished article surface.

If I use G41, then I get the attached:


I've tried changing abs and inc IJ mode with no effect. Did I miss something? Any ideas?

Also, is there information anywhere on "tip direction", I can't find that.

Just got spindle feedback and threading working a treat (mesmerising) but this G41/42 has me stumped.

Final point, why do I get the jagged edges in the tool path display of the work piece? Is there a setting for this?

Thanks very much for your help.

Richard.

3
General Mach Discussion / FeedHold restart?
« on: March 11, 2007, 10:14:57 PM »
Hi, Using Version 2.55 I notice that to restart from feedhold I have to press stop then start. Any one else notice this? Or am I doing something wrong?

This is OK except that the spindle stops and then does not re-start when I press start. So it is a little dangerous? Why can't it be like the older versions where, after feedhold, just pressing start get things going again? This is far more natural I think? Or is there a setting to adjust this I've missed?

Also, it still does not re-start correctly on arcs.  And, if you feed hold twice on an arc, it goes off on a completely different tangent! I think this was being worked on. Can you let us know how it's going?

Apart from this, Mach3 is working just great.

Thanks!

Richard.

4
General Mach Discussion / FeedHold restart errors on ARC
« on: December 21, 2006, 10:51:19 PM »
Art and Brian, thanks for fixing feedhold restart feed rate. That works great.

But, restarting on some ARCs after feedhold, strange things can sometimes happen. Feedhold twice and it goes crazy. Seems to loose its arc definition and starts on a very different path. ???

Pls see attached Gcode and feedhold anywhere on the outer arcs. It will not continue on the path as per the attached pictures.

Restart on the complex small arcs tooth profile then on my XP machine (driver not loaded), it is fine as attached.

But on my Win2k PC, connected to machine, it goes around in small circles after feedhold on the tooth profile (sorry, no picture).

CV or exact stop makes no difference nor does feedrate.

Hope this helps?

Richard.


5
General Mach Discussion / Feedrate Overide Ver 2.25 3 Issues maybe??
« on: December 11, 2006, 07:56:44 AM »
Art, Version 2.0.025 is great in all respects. I love it all.

Well, except three little things. (Unless they are features, I don't know?)

1) Feed Rate Override will allow anything other than G0 go faster than the max motor speed in Motor Tuning, and so loose steps.

Give this a go, setting FRO to 100%:

G17 G21 G40 G54 G90
N10 G0 X0Y0Z10 F111
N20 G1 X10Y10  F60
N30 G1 X30Y30  F600
N40 G1 X50Y50  F1000
N50 G1 X0Y0    F300
N60 G0 X50Y50  F222
N70 G0 X0Y0    F333
N80 G1 X50Y50  F100
N90 G0 X0Y0    F1234
N100 G0 Z0 F0

Works fine. All G0 are at the max speed (F settings ignored) (400 mm/min on my machine) and any G1 F settings over 400 limit to 400.

Run it again at FRO = 120% (not an unusual setting) and all hell breaks loose. G0 are OK but with G1, any setting over 400 is limited to 400 but then the FRO is applied so I get 480mm/min. At 200% I get 800mm/min and mostly missed steps, ouch.

>>Can the total feed limit, after FRO, please be limited to max motor tuning speed in all cases?? (Or is there a setting I have missed?)

2) Look at line N80. (With FRO back at 100%.) F is F100 which is fine but "feed hold" during this path then "Start" again and the feedrate is now max speed (400) and I have a broken tool. Am I doing something wrong? Can it continue at the same feedrate as it was doing please?

3) The feedrate in the "Feedrate" box is not the feedrate of the line the machine is performing. Sometimes it is the next line, sometime a line much later in the file. Is this correct? Can it display the actual line the machine is working on as the FRO displayed is then also not correct for that line?? (Tested with G0 feedrates removed!)

Thanks for your consideration. (I've almost spoilt a few pieces with these points.)

Richard.

6
General Mach Discussion / Zoom in Mach 3
« on: October 12, 2006, 10:10:59 PM »
Loving Mach 3, but have one small request:

Please can the mouse wheel zoom be changed such that one mouse wheel intent changes the zoom factor by a much smaller amount? When you zoom in, one notch is about X2 zoom which is usually too much.  :P

This would be a great help. Could it be a parameter option in tool path config??? New display, by the way, is excellent. (I don't have an option in my mouse driver to change the "sensitivity" of the wheel.)

Next, quick question: is it possible for Mach 3 to display a "perfect" tool path (including arcs) then cut something different half way through or is it always WYSIWYG assuming hardware is OK? Happened just once before, probably my bad G code...::)

Thanks,

Richard.

7
Tangent Corner / Spam
« on: July 04, 2006, 01:45:19 AM »
Don't want to put any clouds anywhere near this great forum but I have a question.

Since joining this and the similar Yahoo forum I get two spam emails from continuously changing accounts with nonsense investment information.

Anyone else get the same? Anyway to stop it? :( I can't use my spam stopper as they use a different spoof account everyday...

But anyway Mach 3 is beaming with sunshine, give or take the freezing up I still get after version 17... But that is another post and almost certainly my doing...

8
Hi All,

Been running licenced vn of Mach3 1.9.017 (fantasic, I love Mach3) and its been completely stable for many hours of operation and survived many stupid inputs and cable disconnections from me as I built my 4axis stepper machine.

Recently upgraded to vn 35, 41 and now 50 and these have all been unstable on my PC. After 5 to 10 minutes, PC hangs and usually system eStops. Motors always stop. Doesn't matter if a programme is running or the machine is idle.

Sometime, in the hung state, I can press the hard eStop on the machine and the PC will instantly recover and I can re-set again. Strangely, the status box sometimes then says "Script Terminated" only when that happens. But, then about 5 mins later the PC will hang and have to hard re-set no matter what the machine was doing.

"Driver Watchdog Triggered" also comes up. When I turn watchdog off, makes no difference to hanging. Also, I messed with increased inputs debounce and that also makes no difference. As Vn17 works, I don't think I have noise. It is a simple setup but with well shielded and filtered inputs.

So, any idea what was changed in the code or the pulsing driver that my PC doesn't like from Vn17 to vn 35 onwards? Or is there a setting I need to change on my setup? Enhanced pulsing on or off makes no difference. When I go back to Vn17, all is well again.

I've been through the very useful optimisation text and the PC works great. P3 1gHz, 256Mb, but it is not in "Standard PC" mode. Is that critical for releases after Vn17? At the moment, I am not brave enough to change this and don't really understand what difference it actually makes. xml attached.

I would be really grateful for your help.

Thanks


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