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Hypertherm 1250 not firing from Mach
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Brian1
Cook
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Joined: 21 Nov 2009
Posts: 19
Location: Abq, NM

PostPosted: Mon Jul 19, 2010 10:00 pm    Post subject: Reply with quote

Jim, it is being fired on top of the plate ready to cut with the ground hooked up directly. I have put the meter on the 2 pins inside the case that are for the arc ok signal and they are not changing once the trigger is pulled.

As far as the micro switch for the consumables causing it, that could be, but I have checked the order in which I have installed them and it all fits together correctly.
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jimcolt
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Joined: 05 Apr 2010
Posts: 16
Location: New Hampshire

PostPosted: Mon Jul 19, 2010 10:07 pm    Post subject: Reply with quote

So....work cable connected to plate, fire the torch directly on the plate...

1. What thickness plate? If really thin the torch may just be blowing a large hole, then losing its arc. Try using material at least 1/4" thick. If the arc still goes out in a couple of seconds....then there is an error of some sort with the plasma system that is causing it to fire a pilot arc then, not sensing arc transfer it will shut down. I don't think it has anything to do with the microswitch in the torch...rather, it could be an inadequate air flow rate, or other fault.

2. What pins are you on inside the case? The arc transfer (arc good) is not inside the case, rather they are pins 12 and 14 on the rear panel interface plug.
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Brian1
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Joined: 21 Nov 2009
Posts: 19
Location: Abq, NM

PostPosted: Tue Jul 20, 2010 1:42 am    Post subject: Reply with quote

1 - I was trying it mostly on 16 or 18 ga.

2 - I am using the screw terminal block on the board that the rear plug tied into, on the 2 arc xfer screws.
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