New Project with Mesa 7I96 and THCAD-05

any idea the scaling resistors I am goig to need for the THCAD=05 and THCAD-10 I just ordered the THCAD-10 and I want to know the resistors I am going to need to scale it down. I am hooking this up to a Thermal Dynamics CM 52 with no divider board. Currently have it hooked up with Proma and getting raw voltage for it. Almost done with my wiring on the mesa 7i96 board. Just need to know what formula you all are using on the input of the THCAD?

I would suggest you see if you can get the Thermal Dynamics Automation Interface and a machine torch (SL60 or SL100) when you order your machine.

See
www.weldingsuppliesfromioc.com/thermal-d...interface-kit-9-8311
I know it costs a bit but for what you are spending on the table and the plasma cutter, its worth doing it properly

I have a TD A120 with the automation interface. I use the 30:1 setting with no divider on the THCAD-10 but for your machine, I would start with the 16:1 which will give you a full scale of 160 volts which should be heaps.

Anyway talk to your dealer about that part number on that link and machine torch options..

TexasCNC wrote: any idea the scaling resistors I am goig to need for the THCAD=05 and THCAD-10 I just ordered the THCAD-10 and I want to know the resistors I am going to need to scale it down. I am hooking this up to a Thermal Dynamics CM 52 with no divider board. Currently have it hooked up with Proma and getting raw voltage for it. Almost done with my wiring on the mesa 7i96 board. Just need to know what formula you all are using on the input of the THCAD?

For the THCAD-10 you could use 2 x 1M-Ohm resistors:
linuxcnc.org/docs/2.8/html/plasma/plasma...uide.html#mesa-thcad

For the THCAD-05, I assume it is for ohmic sensing so you need to follow this:
linuxcnc.org/docs/2.8/html/plasma/plasma..._with_a_mesa_thcad_5

I already have the machine and have the machine torch (SL100-sv). Been cutting great. Now that I want to use the Mesa devices I thought we could use some scaling resistors to get raw voltage and not need a interface card.

TexasCNC wrote: I already have the machine and have the machine torch (SL100-sv). Been cutting great. Now that I want to use the Mesa devices I thought we could use some scaling resistors to get raw voltage and not need a interface card.

Yes you can as Phill outlined. I there there is probably enough room in the TD case to ft it fairly easilly.

Rod wouldn't I put the THCAD-10 in the control box rather than the plasma machine? And power up the THCAD ni the control box with its 5v power supply?