Messages

861

General Mach Discussion / Re: Physical buttons for plasma

« on: November 26, 2016, 02:32:22 PM »

Seems odd they left out a dead-band, hopefully they can add one.

Maybe steppers are more tolerant of non-stop rapid moves than servos?

862

General Mach Discussion / Re: Physical buttons for plasma

« on: November 26, 2016, 08:19:21 AM »

Hiya

absolutely must have a dead-band in there, mine is +/- 1v - does not seem much but should equate to about 0.5-1mm height.

Don't forget that when re-using code from one plat thickness to another, the speed will vary but the voltage will too.

THC is a compromise it seems, you can have one that will cut corrugated steel sheet but not work too well on fine detail or like mine it will work ok on most jobs as long as the plate does not warp too much - if cutting near the edge the waste can buckle upwards and the torch will follow the waste I also have a tip-saver in circuit that detects sharp rises in voltage and locks the down motion out as it thinks the tip has dived into a gap or kerf, then there is Mach Anti-Dive as well which is velocity based i recall.

863

General Mach Discussion / Re: Physical buttons for plasma

« on: November 25, 2016, 08:27:35 AM »

Good stuff

864

General Mach Discussion / Re: cnc problem

« on: November 25, 2016, 05:33:37 AM »

Yep, I know it sounds a bit of a let down but there are so many tales of woe regarding these machines, unless buyers start making point it will never get sorted.

They sometimes work out of the box but more often than not they need countless hours of work and help to fix the issues of poor build, useless components or just downright rubbish construction.

One common issue you may want to check -

The big red safety button, sometimes they lock it in with a plastic clip - to remove this clip you have to take the cover off and go inside - total madness. If the button is not working or feels wrong - it should press in with a click and release with a half-turn or so, check this out first as it will disable everything.

Are there any LED's - do they light up?
Is it set for 240v not 110 etc - this would smoke it straight away.

The list goes on, and on but before you do anything, I would go straight back to the supplier and demand it be fixed or replaced, there are regulations for this type of happening. At the least you should get your £££££ back - this is good because you can then fix the machine yourself if wanted.

Get tough with them - you bought in good faith as a working, new machine, they have to provide this or return funds wherever in the world they are.

865

General Mach Discussion / Re: Physical buttons for plasma

« on: November 25, 2016, 03:52:36 AM »

On your THC, do you have a start delay - the THC should not kick in until the arc is established & stable on the cut AND the cut motion has started.

The see-sawing you had on vid 1 looks like way too much gain on the Z axis for THC moves, but I am only used to stepper drive THC so maybe your system does not have that?

866

General Mach Discussion / Re: Physical buttons for plasma

« on: November 25, 2016, 02:34:55 AM »

Here you go...

http://www.machsupport.com/forum/index.php/topic,21395.0.html

867

General Mach Discussion / Re: Physical buttons for plasma

« on: November 25, 2016, 02:17:02 AM »

There a simple plasma shape wizard on the Mach site, Mach Tool Box, that might help you out

When you say it jumps about, i think that may be normal, my one does and its pretty sharp - you can feel the Z moves in the table as there is no acceleration its quite harsh but thats what you need. It takes a long time to tune THC correctly, and even then it can be hit and miss sometimes.

868

General Mach Discussion / Re: Question on Plasma THC control to users of this facility

« on: November 24, 2016, 04:03:43 PM »

Sounds like your'e having fun, thats what matters

I guess you will have to start the cut as a drag then lift to move?

869

General Mach Discussion / Re: cnc problem

« on: November 24, 2016, 02:04:58 PM »

Your poll is almost there - i would suggest contacting the supplier at first - it was bought as a machine not a kit ??

I guess this would be a 3040 or 6040 machine??

870

General Mach Discussion / Re: Physical buttons for plasma

« on: November 24, 2016, 10:55:41 AM »

Yep, the Hyper electrodes also have a very coarse screw thread up the side but that is also part of the blowback start i think.