Messages

471

General Mach Discussion / Re: "run from here" problem

« on: April 26, 2014, 12:10:29 PM »

Terry - you appear to missing one minute teeny weeny itsy bitsy detail here....

I've already solved this - I did it years ago - I was seeing if YOU wanted to have a go - that's all.

Cheers

Ian

472

General Mach Discussion / Re: Odd glitch in movement?

« on: April 26, 2014, 12:05:00 PM »

I upped the speed, the 6000 marked is 6000mm/min, the other would have been at 3300mm/min.

The different entry/exit angle is still there just not so visible at the lower speed.

From what I have been told and read, this is related to CV being choked by poor acceleration and if this correct, hopefully I will be able to fix it this week when I redo my acceleration settings.

Does that sound correct?

It's impossible to say unless you post the ACTUAL code you used - sorry Dave but something similar to what you used is no use - I can't simulate here without THE file.

However IF the code you used has M codes in the same places then it is absolutely 100% nothing to do with CV. Mach's CV planner can NOT cross M codes. You already know this remember, because it's in my post (#6) in your other thread.

473

General Mach Discussion / Re: "run from here" problem

« on: April 26, 2014, 05:14:11 AM »

OK - it seems different symptoms but same cause - i.e. we need to stop 28.1 or 31 being active during a RFH approach and then become active again once we're ready to resume. Yes?

Unfortunately I need to mod the CAM post but you seem to not want to do that for some reason.

Don't know why you're disallowing that though - that's exactly what CAM posts are for surely.

Ian

474

General Mach Discussion / Re: Odd glitch in movement?

« on: April 26, 2014, 05:06:51 AM »

That code is exactly the same as in your other thread but the two pictures show entirely different results and problems. Have you changed something else or is this (or the other) the wrong code for the image.

475

General Mach Discussion / Re: Controlling THC?

« on: April 26, 2014, 04:59:45 AM »

Dave - Before we do the group hug I'll just get this out of the way ok.

Sorry, your answer was a little contradictory, you said you could turn the THC on or off whenever you liked, but also said it would only work smoothly at certain points I.e. When not in CV.

Better to have said you can only turn it on/off at these points without upsetting motion, it's not the same as being able to do it whenever you want

IMHO Terry is THE plasma guru here but for whatever reason it looks like you're generally stuck with me at the moment. However, I'm not your hired help. If you're going to chip at me and even advise me on how I should phrase things I'll just call it a day here.

Now... onwards...

Yes - CV (and therefore accel and therefore rigidity) are the keys to happiness. I'm pretty sure Terry and I have said this already. I'm think I've also said that you shouldn't need to "tune" CV at all - maybe it was to someone else.

With ref. to No CV on angles > 89: NO - don't do this. You don't want to restrict CV at all.

476

General Mach Discussion / Re: Controlling THC?

« on: April 25, 2014, 11:12:42 AM »

. I'm still using SCam 4.0.19 and I can turn THC on/off whenever I like with no pauses during cutting. YMMV.

Would you care to divulge how you do that?

Maybe slide the finger off that trigger Dave - don't want to shoot yourself in the foot. Right?

Re-read my last post - it's all right there.

It's a dog-bone shape, so I presumed that THC would be off for the curves and on for the straights, this sort of made sense.

Why? You've mentioned this before about turning THC off for arcs - why? Generally speaking unless you're doing small holes - just leave THC ON.

The odd bit is the two extra pauses on the left hand arc, these made no sense and it seem sheetcam has thrown a wobbly at this point so i will pop it over on their forum too.

Look at the code - lines 250 to 320 - it's made of 3 arcs. Between each, you turn THC ON and then immediately OFF again.

477

General Mach Discussion / Re: "run from here" problem

« on: April 25, 2014, 07:42:17 AM »

OK thinking out loud the problem with the G28.1 and RFH is it cycles the G28.1 EVERY time it sees it. This causes the Torch to RAISE up a bit. The more times it is run the higher that torch gets off the material. So when it is ready to cycle start the torch fires WELL off the material. OR it cycles UP far enough to trip the Z limit.

OK - not what I see here so we need to make sure we're looking at the same problem. Here when I do a RFH, it runs the code from the start to set up modals etc. until it gets to the RFH selected line. However in plasma it never actually get's to the RFH line because when it hits a TOM (G31 or G28.1) it just stops (actually on the line following the G31/G28.1 in the code window) - i.e. never gets to the chosen RFH line. All you can then do is hit stop or reset. Here I'm on 3.043.022

478

General Mach Discussion / Re: Controlling THC?

« on: April 25, 2014, 07:17:49 AM »

Sorry but that makes no sense to me - the pause for an M code is down to how Mach executes them. SCam has no control over that. Wherever you put an M code - it will always cause a slight pause. Whether that pause is an issue depends on where it is. If it's DURING CV'd feed movement then it will affect movement - If it's BETWEEN rapid and feed movement, or between exact stop feed movements the pause won't matter. You could always put M codes in any of these mentioned positions. I'm still using SCam 4.0.19 and I can turn THC on/off whenever I like with no pauses during cutting. YMMV.

479

General Mach Discussion / Re: Controlling THC?

« on: April 25, 2014, 06:47:12 AM »

The "rules" are called the post processor or just the post. 

Macro pauses shouldn't be an issue for what you're doing as you're doing it BETWEEN cuts not DURING cuts.

480

General Mach Discussion / Re: Odd glitch in movement?

« on: April 25, 2014, 06:44:16 AM »

Someone woke up Mr. Grumpy this morning then...

re-install is easy - but of course you should always backup first. I do it all the time on my test PC to try different things and have never lost any settings. I do it by un-ticking everything except for the parallel port driver. That way it installs Mach and the PP but no xml, no screensets, etc.

Just a hunch but read this thread - I think it may be related. http://www.machsupport.com/forum/index.php/topic,24350.0.html