Plasma voltage 1:1 on Herocut 55i

I have a herocut 55i with CNC interface. The only issue is the voltage has a ratio of 1:1.
What is the preferred way to get the voltage divided to what would be needed with Plasmac and Mesa's THCAD-10?

A common way is two 1M resistors, checkout the THCAD10 section here:

linuxcnc.org/docs/2.8/html/plasma/plasma...ng_the_divider_ratio

phillc54 wrote:

A common way is two 1M resistors, checkout the THCAD10 section here:

linuxcnc.org/docs/2.8/html/plasma/plasma...ng_the_divider_ratio

Can I convert the THCAD-10 to a THCAD-300? That way I won't need a divider.

bevins wrote:

I have a herocut 55i with CNC interface. The only issue is the voltage has a ratio of 1:1.
What is the preferred way to get the voltage divided to what would be needed with Plasmac and Mesa's THCAD-10?

Before you panic too much, measure the resistance from the Herocut output pin to each electrode terminal. I would expect them to put a resistor in line to get the current down to a non lethal level. If thats the case add the two up and add one more scaling resistor in the control panel at the thcad to make up the required scaling resistance.

I'm not sure the thcad-300 is the anwser here if they have already added resistors.

Update: I would expect 100k resistance on each pin from Everlast and Thermal Dynamics

rodw wrote:

Update: I would expect 100k resistance on each pin from Everlast and Thermal Dynamics

Thanks Rod,

I'll check when I get to it. I am changing out those pesky useless Chinese drives and motors. I bought a set of DYN4 ac servo and drives.

This project is a never ending money pit. Cant wait to get rid of it.....lol