Any advice, HT 65, CandCNC, 16 gauge

[whiskeymike]

I haven't cut art in a while and was working with it today. Was getting a fair amount of burn through, discoloration, torch dives on corners, etc... I worked through changing a bunch of settings and got it to the best I could. With the number of dives, I found the best setting with getting rid of Dthc completely through rules.

I grabbed a file from here to avoid it being a problem with my art or design process.

Take a look and let me know if you have any advice.

Cutting 16gauge, 45 amp fine cut consumables. Settings provided in screenshots including rules.

[whiskeymike]

Thinking about it some more. I think I need to get Dthc back on, lower the power and bring the speed down.

[acourtjester]

HI Mike
Not sure if this will help here is pictures the same file I cut in 16 Ga. 80 volts 0.09" pierce and cut heights at 200 IPM. Using a fine cut nozzle and about 38 amps. The plaque is 11.5 tall and 15 wide, I also have a switch in the arc OK signal line so it's always on. I used a 0.09" perpendicular lead in.

[whiskeymike]

That is very helpful to have the same part cut, thanks. Are you changing the amperage on the front of the HT? Can you tell me what your rules are in sheetcam? We have an identical setup, except I don't have the switch in line for ARC OK. You've mentioned that part before and I need to go back and reread those posts as I think it's something I need to do. That is to support the torch off command right?

[acourtjester]

I adjust my HT manually do not have the mod to control amps from SheetCam.
The arc OK signal switch is to remove any delay that waiting for mach to know there is an arc.
With thick metal it helps with the pierce hole. I don't use cut rules I had used some earlier but did not like the delay when they were acting for corners, I should use them for circles.

[tcaudle]

Try using the "Min Cut Lenght for DTHC" in the Operations. (third photo) Set the number to slightly greater than the largest feature you want the DTHC to not be on. Since it measures the cut before it starts it it simply keeps the DTHC from turning on so there is no delay. If you want to cut at slower speeds put the objects you wnat to cut on another layer in SheetCAM and lower the feedrate there. This works well with smaller holes and smaller features

[sphurley]

Remember that if you put in a number in soft pierce, such as the 60% number you have, and you do NOT have the RS485 and HyT features, it will slow down the Z plunge rate from the 150ipm you have to 90ipm, but not lower the amps. This can cause excess divots on the pierce points.

[acourtjester]

correction to my last post I said thick metal it should be thinner metal 14 ga and below.