newbie, Proma THC and Hypertherm help

carbon

Carbon
I am setting up a new build CNC plasma and I have the movements X, Y,Z all working and at the stage of firing the plasma and I can't get any reaction.

I put the THC in TEST and I don't see changes on the F1 screen to the status of the plasma arc, THC 1 or the THC 2.

Any Hints?
 

carbon

Carbon
Hi Peter,

Yes I have the Proma 150 and I have tried the wiring as in the drawing, I have also tried to run the Proma from a separate power source with the COM to the Masso GND.

When I try a test cut if I have the ARC OK set to Low I get a No Arc Error, I set it to high and no errors. If I set the THC input1 and THC input2 to low and do a Proma Test they both change to high and stay high. If I change them to High and run the Proma test they stay high.



Ian,
 

cncnutz

CNCnutz
Staff member
Hi Carbon,

Can you please share a screen print of the F1 screen showing the Arc, THC1 & THC2 inputs set as you are using them with your THC please?

To get a screen print press CTRL+P and it will copy the screen to your USB flashdrive which you can share here

Cheers

Peter
 

carbon

Carbon
Hi Peter,



Please see attached photo
 

Attachments

  • IMG_4701.jpg
    IMG_4701.jpg
    130.8 KB · Views: 15
  • Print-Screen-003.bmp
    769.1 KB · Views: 13

Ross

Ross
Hi Ian, this is how i wired mine. Proma states to have a separate power source to power the THC.

I used 2 core shielded on everything and it is grounded too the control box. The control box is grounded straight to the grounding rod under the plasma table.

This picture shows how i wired mine and it is correct!

From Ross.
 

Attachments

  • Wire-THC.jpg
    Wire-THC.jpg
    635.2 KB · Views: 15

carbon

Carbon
Quote from Ross on December 11, 2019, 5:18 am

Your ark OK should be low as well i just noticed it.

from Ross.

Hi Ross,

I have tried with Arc set low and I get an error, "no Arc" and i read in another post to set it to high and I tried and I do not get that error.

Ian.
 

cncnutz

CNCnutz
Staff member
Hi @carbon

Ross is right the Arc should be inverted as well to show low then the arc is not struck.

When you put your Proma into test mode you should see the Arc ok change to high and the THC1 & THC2 should change to match the up and down lights on the Proma.

If you issue am M667 in MDI the Z axis should start moving up and down in accordance with the Proma lights.

If the F1 lights do not change please confirm that you have the Proma COM connected to Masso -ve



Cheers

Peter
 

carbon

Carbon
Hi Peter.

I originally wired the Proma to a separate power supply (12V) but used the power from the supply that powered the Masso (24v) to attach the +ve to the pull up resistors (5.6k) and the -ve to the COM.

I did then try to wire as the Masso diagram with all the power, ground and COM from the Masso power supply, same results.

When I go to proma test I see on the F1 screen the THC1 & THC2 change to high as soon as the test starts and stay high.

When I try a test cut if I have set the Arc to low the machine stops just before the cut is to start and I then get an error NO ARK.

I set the Arc to High and the file runs through the whole file but the plasma does not start and there are no errors.

Ian.
 

cncnutz

CNCnutz
Staff member
Hi @carbon

Break you testing down into small segments. Fix each in turn because it is a waste of time jumping ahead until everything is working.

Here is what I would do.

Disconnect the COM, UP, DOWN, ARC OK wires at the Proma.

Open the F1 screen on Masso and make sure the ARC, THC1 & THC2 inputs are inverted and all show Low.
  1. Connect the COM wire to ARC and make sure the input on Masso changes to High. If it does move to step 2 and if it doesn't check your wiring as you have something wrong.
  2. Connect ARC wire back onto Proma
  3. Connect the COM wire to UP and make sure the input on Masso changes to High. If it does move to step 4 and if it doesn't check your wiring as you have something wrong.
  4. Connect Up Wire to Proma
  5. Connect the COM wire to DOWN and make sure the input on Masso changes to High. If it does move to step 6 and if it doesn't check your wiring as you have something wrong.
  6. Connect DOWN and COM wires back onto Proma
  7. Run Proma in test mode and it should now all work.

If you do things in a slow methodical fashion you will make progress far quicker than you ever will leaping randomly from one thing to another.

Cheers

Peter
 

Ross

Ross
Here is a video of me trying to explain the wiring.

The other thing is i am sure you have electrical noise cause i had the same problem.

Plasma lead has to be 150 mm away from any other wiring.

All wiring must be shielded and grounded, that is everything "table, controller, control box"

and use ferrite beads everywhere as well.

Ferrite all the driver wiring as well.

Ground every moving part of the table, plus controller and control box!

I am sure this will fix the ark OK signal.

From Ross.

 
Top