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MASSO
MASSO Documentation
As it moves the THC will send out Up and Down signals on the THC1 & THC 2 inputs
If Input THC1 changes to High MASSO will move the torch up
If Input THC2 changes to High MASSO will move the torch down
If both inputs THC1 & THC2 are High MASSO will ignore the error and the torch will not move.
If both inputs THC1 & THC2 are Low then the plasma is at the correct height and the torch will not
move.
MASSO will continue to adjust the torch height until it receives an M666 command to turn off the THC
function on the next axis move.
Notes:
The MASSO Z axis cannot be jogged while the THC function is turned on.
MASSO will ignore Gcode instructions to move the Z axis while the THC function is turned on.
Use software version 3,47 of later to ensure no hesitation in motion when the THC is turned on or off.
A motion command must be issued before the THC will turn on or off. eg G01 X150 Y246
The M667 command allows for a Z axis feedrate to be specified. This will only affect the Z axis speed
when in THC mode. The primary use of this feed rate is to slow down the speed of the z axis so that
it does not move too fast and overshoot. Example: M667 F50. It does not affect the feed rate of the X
or Y axis and the Z axis feed rate will return to the previous value when THC is turned off.
If while cutting you find that the torch head bounces up and down in an uncontrolled manner you may
need to adjust the THC voltage settings or slow down the Z axis feed rate specified in the M667
command. Example: M667 F50
Connection of the THC inputs to MASSO
CAUTION: Plasma's generate a lot of electrical noise and interfere with electrical equipment in the
vicinity. Please ensure you correctly earth your machine for safety and to reduce the electrical
noise. Earth your plasma in accordance with manufactures instruction and best practice.
INFORMATION: The following section explains 2 methods of connecting the THC and why one is
preferred over the other. The actual connection of your Arc ok, THC1 & THC2 inputs to MASSO
will depend on the THC unit that you are using and what type of outputs the unit uses. Please
consult your user manual.
Preferred method
The diagram below is the recommended way to connect the proma Compact THC 150 to MASSO. The use
of resistors from the positive of the MASSO power supply to the MASSO inputs will turn the Inputs on and
the THC will switch MASSO ground to the inputs to turn them off. Because this logic is wrong for MASSO the
inputs are inverted on the F1 screen so that they show Low in the normal state and High when the THC
sends a output.
When there is no signal coming from the THC the input will be turned on which reduces the chance of noise
entering the input and providing a false signal. When the THC sends a signal ground signal will turn the Input
v5.18 - 08 Apr,2021
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