Hypertherm 1250 not firing from Mach

jeepsr4ever · Posted: Fri Jul 16, 2010 6:01 pm Post subject:

Well if you like I can send you a CT for free and get you up and running right away. They are pretty easy to install.
_________________
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

Sure I will give it a try. Let me know what I need to do to get it, thanks.

jeepsr4ever · Posted: Sat Jul 17, 2010 6:27 pm Post subject:

Just need your shipping address again and I will get you one out.
_________________
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!

jimcolt · Posted: Sat Jul 17, 2010 10:07 pm Post subject:

Brian, Pins 12 and 14 on the rear panel connector on the powermax unit are the arc transfered signal. When the arc transfers to a piece of metal with the work clamp attached, you will see this signal go from open, to closed. You do not need a current transformer with this unit.

Jim Colt Hypertherm

I see you figured out the start input. If you use the machine torch, the start input on the rear panel connector (pins 3 and 4) is functional, short 3 to 4 and the torch will fire. If you are using a hand torch....pins 3 and 4 are inactive for safety reasons.

jeepsr4ever · Posted: Sun Jul 18, 2010 4:15 pm Post subject:

Ah, so your not firing but you do have everything else hooked up right? You will have to find the two leads that fire the torch that actually hook to the torch lead not the machine torch lead. Hypertherm turns off the machine torch on and off for liability however they also do not tell you how to bypass this for CNC use. There should be a plug that has many wires hooked to it (This is J19) but Hypertherm may have disable it for use with the hand torch. But there are two more leads leading to the hand torch you can use.
_________________
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

No, everything is hooked up and it does fire. My problem is the arc will not stay on, it goes out after a few seconds. The arc-ok relay or whatever it is inside the plasma is bad or sticking. sometimes it works and most of the time it does not. This hapens both on the CNC and if I am just using the machine by itself.

jeepsr4ever · Posted: Sun Jul 18, 2010 11:03 pm Post subject:

I have seen lots of hypertherm torches misfire when the outer cap isnt all the way on or cross threaded as well. They fire then stop or just blow air. Hypertherm uses a microswitch to ensure the consumables are attached before it will fire. I can still send you that Current Transformer if you like and if you dont want to get your plasma warranteed.
_________________
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

Let me mess with it a little more and if I still need the CT i will let you know, thanks.

jeepsr4ever · Posted: Mon Jul 19, 2010 6:00 pm Post subject:

Just so you know here is where the torch leads are coming out and here is the current transformer hooked up. The leads to the DTHC card are black going into the J8 plug.

_________________
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!

jeepsr4ever · Posted: Mon Jul 19, 2010 6:02 pm Post subject:

10W15Ohm resistor across the current transformer only requires the wire go through once. We used a 10W20ohm resistor and went twice for this application.
_________________
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

Brian where the wires you spliced into rigth of the torch purple and orange? ....think Im about ready to trad this thing in on a thermal dynamics![/quote]

jimcolt · Posted: Mon Jul 19, 2010 9:21 pm Post subject:

Brian,

When you say you "fire the torch and it goes out after a few seconds" , are you firing the torch on to a plate with the work ground attached......or are you firing it in the air? If you are firing it in the air....the torch will shut off after about 1.5 seconds as it is not sensing a work ground current path. If you are looking for an arc good signal, it will only ocurr when the arc is cutting metal with the work ground clamp attached.

Also, I will say it again...there is no need for a "current transformer" on the Powermax unit you are using. It will provide you a contact closure output as soon as the arc transfers to the plate, on pins 12 and 14 on the rear panel connector. The Powermax1000, 1250 and 1650 as well as the Powermax45 all have this "arc transferred" (also know as arc good) signal...and are designed for an easy interface to any cutting machine. You are making things way too complicated by adding the current transformer.

Jim Colt Hypertherm

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