Initially the postive connection is made as the amps ramp up the connection is lost. Always make your connection to the metal your cutting.
A magnetic welding lug works great. This is what a lot of us use.This magnetic ground clamp has a finned design to lower temperature by 27% and provides a strong, reliable hold on any flat or round steel surface. Check it out now! Amazon.com
Your settings or other problems may exist but lets get this fixed first to eliminate a bad work clamp connection.
Huh, let me think about that. 
Reliable := consistently good in quality or performance; able to be trusted.
Oh! I get it. You would get a CONSISTENT amount of power to your plate that’s being thrown around by this 75 PSI blast of air and water splash…
Maybe poor connection in the beginning and, as the 75 PSI presses the plate into the slats…
Nah… silly idea… 
Maybe that’s it, maybe not. But you’d be foolish to rely on the slats to supply power to your plate. That’s more fundamental than dry air.
Understood. Only reason I question is because with the issue I am seeing in is “Consistently” bad in the same spot. This to me reflects a different sort of error especially as I run a NC file from someone else and it cuts just fine. My main agenda is to tune settings from here to eliminate that consistent error
I definitely agree with advice above. You need your work clamp on the metal being cut.
Long shot here. Is it possible you have some mistake in units for your CAM settings (like cut hght, springback): you are entering values thinking it’s in mm but F360 is using inches(default)?
I do all my sketches in mm and have to remind myself not to enter mm when Post Processing.
Yes definitely will run the ground right to the workpiece. Still didn’t fix the issue I was having. I will have to check that thank you. I struggle with paying attention to what units each software is in sometimes especially as I don’t use fusion as my modeling software on as a CAM software.
Also what values do you typically use in Fusion if you know so I can cross reference? Thanks
Depends on what metal I’m cutting, but say for 16 gauge:
Cut Height 0.06"
Springback 0.00 There is a lot of info on this site about determining “actual cut height” vs programmed, You may want to investigate that and run the test program and stop and measure your actual hght vs programmed.
Where is the short gcode file for cut height? - CrossFire ® / Tips and Tricks - Langmuir Systems Forum
Pierce Height 0.07
You’ll get a lot of different opnions/experiences on these numbers. Just what works for me.
Ok awesome that is great place to start for me though thank you!
I’m wondering if it has something to do with the pierce delay?
When I was having those same issues, we found that increasing the pierce delay
really helped!
Ours is set at around 1-1.1sec (works best for us).
-Mike
Yes that was my initial thought too. In my original picture the delay times were changed between all the cuts and it would pierce fine but then not cut. The only thing that helped a little was to slow the cut way down. I will definitely take your advice and play with the delay time some more. Thanks:)
I’m sorry, guys, but a pierce delay of 1.1 or greater is the correct setting for 3/8 A36. If you guys make signs with 16-gauge, .5 or .7 would be the longest. If your pierce delay is too long, you are blowing a hole in the metal, and the THC is losing its reading with the plate that is no longer there. Just my two cent from a table that works correctly every single day.
You’re one it as usual Bigdaddy.
I cut almost exclusively 16 and 18 gauge signs. My pierce is 0.7 secs for the 16 ga and 0.6 for the 18 ga.
With a RW45 and Duramax torch my PD on 14 ga is .2 with the original torch it was .5
Yes i cut mainly 14g and I have found .7 seconds to be the sweet spot so I am on par with you guys.
Thanks for this. I have had this issue now develop as well. I will be keen to see if there is a solution. I am running a Razorcut 45, and developed this issue right after I included the THC. Prior to that I had been using IHS only with very good success. Once this started I sent the plasma cutter and torch to the JASIC techs here. They tested and sent back with good health status.This is what it is doing now.
Have you verified you cut height? If this started after add THC 95% chance that is where your problem is
This looks exactly like what I was seeing and I hadn’t really put two and two together but it did seem to cut a lot better with just IHS before I hooked up my THC unit. My next step is going to be to check the cut height with the THC because I have gone through most other suggestions with little success. Any tips from anyone on checking torch height with the THC? I have the torch height test file but a list of steps would be helpful.
its been discussed here many times do a search
Any help finding the best file to use? Can’t seem to find where I once saw it. Thanks
Plasma_bot, have you done anymore testing and figured anything out? I tried lowering the cut height and no change. Still more testing to do regarding cut height for me though.
