Will keep this short and sweet as I can.
Hypertherm 45xp - No CPC port - Laptop charger unplugged - USB isolator installed.
Still having trouble with my THC after 2 months of fighting it. One day it started raising itself up terribly, and has not been the same since. Before the issue happened I was cutting 12ga at a 110v nominal and it was great. Then “something” happened. I am now forced to rely on smart voltage as ANY nominal setting is wrong and causes weird raising as well. The smart voltage it selects is about 46v, although it still will raise itself up sporadically as it wishes anywhere between 1/8" and 1/2". I have been in contact with Langmuir over the 2 month period and have had some parts warrantied but also thought I would post here for more ideas because I am stuck.
One major issue I am having is that my raw voltage measured at the pigtails is about 98v and my live voltage is around 45v. Hypertherm tech support says that it is impossible for the arc to initiate at 45v.
I have followed the THC troubleshooting guide and everything checks out untill step C4. I have voltage here although about half as much as should be expected according to the troubleshooting guide. I don’t really understand how this talks to fire control but one thing I notice is that I am also getting a live voltage report (46v) of about half of my raw voltage (98v).
Langmuirs trouble shooting guide suggests I have a grounding issue, here is a copy paste from step c4 on the guide.
" If you are getting DC voltage between these two pins while cutting but the voltage is much less than what was found in step A3, it is possible that you have a grounding issue between your electronics box and the machine frame. Please check out our following guide as you most likely have a DC grounding issue: http://www.langmuirsystems.com/thc/guide#grounding-section "
I have tried everything I can think of to help isolate things, including running the machine with the enclosure box removed from the table let set nicely on a cardboard box as well as a brand new computer plus the warranty parts from Langmuir. I am not really wanting to drop the cash on a new 45xp just to see if it fixes the problem.