Hypertherm 1250 not firing from Mach

Brian1 · Cook Joined: 21 Nov 2009 Posts: 19 Location: Abq, NM

Got everything wired up in my Hypertherm 1250 according to the diagram in the Candcnc manual for the 1250 model. I am still learning to use the mach interface but I am not able to fire the torch manually from the software. The DTHC online is lit green on the screen but pressing the manual fire doesnt work. What am I missing? I do hear a click coming from inside the 1250 case but get nothing else.

jeepsr4ever · Posted: Fri Dec 11, 2009 3:46 pm Post subject:

Your torch switch should be hooked up the the DTHC card. Can you get the unit to fire by hand? Sometimes its the plasma consumbles (torch ignitor) that fails due to consumable life and water in the line. Check for

2. Wiring on the DTHC card

Verify with the digital manual that all leads are in the right spot
Your DB9 cable is plugged in

1. On the plasma unit

You can fire the unit by hand and it does indeed make contact in the head and fire the plasma torch.

Chances are you dont have the switch wired to the card correctly.
_________________
I know AMC engines from oil pan to air cleaner. Performance and reliability are built every workday in our shop. We dont mess around with other makes, AMC only! If you have a question and cannot get through on our phone lines please PM me or email me personally at Jeepsr4ever@yahoo.com -Thanks

Nice hot one this year!

Brian1 · Cook Joined: 21 Nov 2009 Posts: 19 Location: Abq, NM

Yes it does fire by hand. I double checked the card when I hooked it up but I will look again. The DB9 cable is hooked up because I can hear a click inside the hypertherm case when i press the torch fire button on the screen. I am going to mess with it today and see if I can get it working

ironman_gq · Tech Master Bulltear Forum Joined: 15 Nov 2005 Posts: 1176

when you hear the click does the air flow start? If you have no air flow you get no fire.

Brian1 · Cook Joined: 21 Nov 2009 Posts: 19 Location: Abq, NM

No air flows when I hear the click but the air is hooked up with pressure and when I pull the trigger on the torch manually the air comes out as well as the arc.

jeepsr4ever · Posted: Fri Dec 11, 2009 8:01 pm Post subject:

Check the output signals in the ports and pins menu in the config menu, output #1. It should be Port 2 Pin 1 to fire the torch.
_________________
I know AMC engines from oil pan to air cleaner. Performance and reliability are built every workday in our shop. We dont mess around with other makes, AMC only! If you have a question and cannot get through on our phone lines please PM me or email me personally at Jeepsr4ever@yahoo.com -Thanks

Nice hot one this year!

Brian1 · Cook Joined: 21 Nov 2009 Posts: 19 Location: Abq, NM

I will do that in a minute.

I think it has something to do with the hand torch being used and the actual Hypertherm circuitry. Right now the torch switch is wired to the board inside the plasma. I just looked at the Hypertherm manual and it said it is disabled when using the hand torch. Do I need to splice into the switch wires coming out of the hand torch and not use the connections on the board? Im thinking that is probably it.

jeepsr4ever · Posted: Fri Dec 11, 2009 8:46 pm Post subject:

I think you should call Hypertherm tech 1-800-643-9878 I do believe this could be an issue if the DTHC is hooked up you should not be able to fire the torch usingthe handle.
_________________
I know AMC engines from oil pan to air cleaner. Performance and reliability are built every workday in our shop. We dont mess around with other makes, AMC only! If you have a question and cannot get through on our phone lines please PM me or email me personally at Jeepsr4ever@yahoo.com -Thanks

Nice hot one this year!

wingnut165 · New to the forum Joined: 03 May 2010 Posts: 4

so what did you ever figure out? I have the same thing going on! Neutral

Brian1 · Cook Joined: 21 Nov 2009 Posts: 19 Location: Abq, NM

I fixed it by splicing into the trigger wires for the hand torch right after it enters the case. The safety built into it does not allow the trigger to be turned on from the board with the hand torch installed. I originally installed my trigger wires onto the plasma board which is why it was not firing.

Now if I could just figure out why the arc ok signal is not working/sticking I will be in good shape and finally cut some steel.

jeepsr4ever · Posted: Fri Jul 16, 2010 5:47 pm Post subject:

Bryan what power resistor are you using across the terminals of your current transformer? Also do you have the ark ok wires hooked from the current T-former to the right terminals on the DTHC card?
_________________
I know AMC engines from oil pan to air cleaner. Performance and reliability are built every workday in our shop. We dont mess around with other makes, AMC only! If you have a question and cannot get through on our phone lines please PM me or email me personally at Jeepsr4ever@yahoo.com -Thanks

Nice hot one this year!

Brian1 · Cook Joined: 21 Nov 2009 Posts: 19 Location: Abq, NM

I am using the direct connections inside the case on the board and not using a current transformer hookup.

I have narrowed it down to the plasma cutter itself because it does the same thing when it is being used as a stand-alone plasma cutter and not hooked to the CNC. I just havent had the time to sit down with it and give Hypertherm a call to troubleshoot it.

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