Documentation

How MASSO Plasma Works

How a plasma cut runs on MASSO: selecting the plasma tool, what G200 and M3 do, and the F2 Plasma and Overrides tabs you use while cutting.

Applies to

MASSO G3 and MASSO G3 Touch, software 5

Plasma tool

Tool 112

Set up first

MASSO DTHC and Plasma I/O

Selecting the plasma tool

Plasma only works with Tool 112 selected. Select it with T112 M6 in the G-code (ideally in the file header) or in MDI. MASSO stays on Tool 112, including through power off and on, until another tool is selected. Selecting any other tool cancels plasma mode.

INFORMATION

No Plasma tab on F2? Check that Tool 112 is selected and plasma is enabled in Multi-Head Settings.

The plasma cycle

G200 sets the cutting parameters and automates touch-off, piercing and moving to cut height. It's required for the MASSO DTHC and recommended for legacy THC units. MASSO handles all Z moves while cutting, so your G-code only needs to move to a safe Z between cuts.

Plasma cutting sequence animation

T112 M6 selects the plasma tool. On a multi-head machine the Plasma Up/Down output goes high to move the torch into position.

When the file runs, the G200 values fill in the Plasma tab.

M3 starts the cycle: the torch touches off on the material, moves to pierce height and fires the arc.

MASSO waits for Arc OK, then the Piercing Delay, then moves to cut height. The pierce count goes up by one.

M667 F… turns THC on. The DTHC moves Z to hold the cutting voltage; F sets the Z speed under THC.

M666 turns THC off and M5 turns the arc off.

With a legacy THC unit the cycle is the same, but the voltage is set on the THC unit and the G200 V value is ignored.

INFORMATION

In legacy mode (G200 with no parameters), touch-off isn't automatic. Do it in the G-code, for example with G38.2.

F2 Plasma tab

F2 screen with the Plasma tab

Click a box to type a new value. You can do this while cutting to fine-tune the cut. Torch Up and Torch Down change the cutting voltage by 1 V per press.

#	Parameter	Set by
1	Touch off feedrate	G200
2	Piercing height	G200
3	Piercing delay	G200
4	Cutting height	G200
5	Cutting voltage	G200
6	THC feedrate	M667 F value
7	Feedrate anti-dive (not yet implemented)	G200

Arc time

How long the arc has been on, to track consumable wear. Enter 0 and press Enter to reset, or enter the existing time in seconds when fitting a part-used tip.

Pierce count

Number of pierces, kept through power off and on. Enter 0 to reset, or the existing count when continuing with a part-used consumable.

Overrides tab

Slider	Adjusts	Range
Feed	X and Y feed rate	10–100%
THC Feed	Z speed under THC	20–200%

If Z oscillates while the DTHC is holding height, lower THC Feed until Z moves smoothly and follows the material. Note the value and use it as the M667 F value in future files. Reset returns both sliders to 100%.