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I cut nothing but 16 gauge steel. My pierce height and cutting height are the same..If you start the cut too high,giving you the high voltage, then the THC needs to ramp down to the cut height..
I...

It just sounds like the motor is jammed..dismount it from the machine with the wiring still connected..Just the stepper motor all on it's own and see if it spins both directions

I don't know what else to say..I run a G11 BOB that is opto isolated..From Cnc4pc..It has everything you need..relay to fire the torch..
I run 203v Gecko drives..They are also opto isolated.
I do...

Yes it is..it has been working for nearly 10 years this way..

The power cord that feeds everything that my computer is hooked up to..I have a separate computer type of power supply that runs fans,...

Well there was nothing else I could do to get it going..The machine would jog over..do the touch off dance and then fire the torch..This is a hypertherm 1250..A good machine..But then it was frozen...

I know that this thread is as old as the hills, but I wanted to give some info on cutting 1/4 plate..I used the 40 amp nozzle..220006...130 volts..40 amps...04 kerf...45ipm..It cuts it perfect

I...

I have been running my CNC plasma table for over 10 years now..I had these problems when I first got it going..XP computer..CNC4PC G-11 BOB..Gecko drives..

What was happening is the ground was...

I can only tell you from my machines perspective on setting the torch height..Example..Hypertherm 1250 cutting 5/8th steel..Owners manual says that the THC voltage during cutting is (at 80 amps) 145...

On my breakout board ...CNC4Pc C11 board, the port 1 pin17 is for the charge pump..that is the constant signal from Mach that makes the BOB active..Without that signal, such when you hit the reset...

I am using the Cnc4pc C11 BOB..It has 2 relays activated with pin 16 and pin 1..I guess that if I had 2 wires to the torch switch from the pin 16 relay..and Mach 3 firing that pin 16 each time the...

I was wondering about the actual turning on of the torch is done..
Believe it or not but I am running, very successfully an old Campbell 300 THC..

It has a small board that is located inside my...

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195614

In your picture, what are these 2 wires,circled with the red oval doing?? Home switch??

Thanks Jim for this document!! To be honest with you, you are the reason that I went with Hypertherm for my table..That 1250 in fine cut configuration has been fantastic!! It has worked...

Let me fill in details here..I had my plasma table inside one of these tent carport setups and right next to it is the power pole with a meter panel..At the bottom of the panel was a plug for the...

I didn't do anything to the computers mother board..I just set the computer on top of this cabinet..running all of the wires from it to a lower shelf to hook up the BOB and the THC to it..I guess...

From what I was understanding of the ground loop issue was that all of the power that was being sent into the earth by way of the plasma arc was actually traveling down the ground rod of the table,...

When I was setting up my machine, I built a wooden cabinet that had the computer and all the drivers and BOB system in it..16 gauge cables out to the stepper motors..There was a separate ground rod...

Here is another thing that I saw in the video..you roll your mouse wheel in to zoom in..pretty soon it stops zooming in and in the bottom corner of the screen it says that "zoomed in as far as...

Ger 21 has the answer here..try this experiment.. zoom in on the circle while viewing the arc that creates the circle..always have the circle in view or rather just a small portion of it..pretty...

Buy a book on solidworks.. i just bought Solidworks 2011 parts by Matt Lombard off of E bay for 20 and 4 dollars shipping and it had a dvd that has several tutorials..
Having a book that shows every...

First off, what program did you use to create these letter with..Did you use the "thicken" command?? What you need is simple closed polylines to cut with. Your example actually has lines above other...

I have the same 1250..using Mach 3 and THC 300 from Campbell..I had the same problem with high taper..Your torch is too high creating the taper as it runs..try this..during the middle of the cut, hit...

The way I would do it is with the 3d slice command..Imagine a round loaf of bread that you cut at an angle twice and then remove the slice of bread that you just cut..You have to draw a 2 d drawing...

Take a look

Use v carve if you have it..Draw a 2 d sketch..separate perimeter and separate pockets representing your notches. Have v carve using the pocket feature to cut the pockets(notches)..And then the...

Show us a screen shot of your Mach controller..it may not be on there and you'll have to put it on using Screen 4 to do it..

Hey Mike,looking at your drawing on post 26, could you put a bearing and v rail on the bottom..this would keep the gantry from tipping forward or back during hard acceleration and braking..just to...

When it comes to electronics..I know nothing!! Just basic understanding..so your THC would not involve the use of mach,since it is using a separate motor and system to control the height ..I think I...

But what are you using to control this servo..to maintain the voltage..If I recall,my THC is looking at the voltage and adjusting it several times a second..

Here is an example a piece of G code from sheetcam...(...) are my writing

N0070 (Part: Jan-14 2011)
N0080 (Process: Plasma, online cut, Plasma, 0.05 inch kerf)
N0090 M06 T17 (Plasma, 0.05...