Basic question that I could not find the answer to via search,
How can the Mesa THCAD-10 be used as a plasma THC without using a Mesa card to read the output frequency? Can another board be used that will just convert the frequency to a voltage?
I am setting up my ethercat system and would like to use the Mesa THCAD as my torch height controller but I am unsure how to integrate it with other hardware.
I think I read in the manual that there should be provisions added for such a case when using the THCAD300, but the reality is that all plasma cutters with HV or HV/HF start must have such provisions inside to protect the rectifier from high voltages produced during pilot arc.
The only caviar is, do not wire it to the big cable terminals, never. Look for a small board with capacitors and resistors in it, those are the things keeping the rectifier from blowing up at every start. Use a DVM, both terminals that go to the workpiece and the torch are wired to that board so they will show as a short on the DVM ( or a beep with 0 resistance. ).
Will do a video very soon.
Anyway, I can barely wait to wire it to one of the Mesa boards and start doing some controlled destruction on metal plates !
You can also use the parallel port, but it is nearly unusable.
Thinking of it , I will test that also and report back, while I am at it.
rodw wrote: THCAD is not dependent on mesa hardware so I think you just need an ethercat encoder input .
But I thought you were using gecko drives. Did you change your mind?
I am using Gecko Drives on my current machine but my future machines will be based on ethercat.
pl7i92 wrote: what etercat system are you using
german beckhoff ?
what hardware parts you already got
I am still working out how I am doing to design the system,
I am thinking I will use Ethercat AC servos, At this stage I plan to use a AB&T Easy I/O ethercat slave and was planning on using a Mesa THCAD-10 for the THC.
I just have to work out how I am going to interface the THCAD with the ethercat hardware.
As in should I be looking for a incremental input type?
What about this one?
BUt I know nothing about this stuff. There are heaps of analog voltage sensors, just some of the look pretty slow v's the servo thread, this one looks fast enough and is 16 bit