Setup for plasma cutting need help
17 Jul 2012 09:07 - 17 Jul 2012 09:07 #22062
by andypugh
Replied by andypugh on topic Re:Setup for plasma cutting need help
ricky_a wrote:
THC is "Torch Height Control" and is a sensor on the cutter head which measures the distance between the cutter and the workpiece.
There are a number of ways of doing it, including measuring the arc voltage.
Is the thc something in the plasma cutter machine ?
THC is "Torch Height Control" and is a sensor on the cutter head which measures the distance between the cutter and the workpiece.
There are a number of ways of doing it, including measuring the arc voltage.
Last edit: 17 Jul 2012 09:07 by andypugh.
Please Log in or Create an account to join the conversation.
17 Jul 2012 09:21 #22065
by ricky_a
Replied by ricky_a on topic Re:Setup for plasma cutting need help
We understand it better now...
We thought that it was possible to make it with a switch connected to the breakeoutboard (www.zappautomation.co.uk/zp5aint-p-499.html?cPath=143)
We thought that it was possible to make it with a switch connected to the breakeoutboard (www.zappautomation.co.uk/zp5aint-p-499.html?cPath=143)
Please Log in or Create an account to join the conversation.
17 Jul 2012 11:17 #22069
by BigJohnT
Replied by BigJohnT on topic Re:Setup for plasma cutting need help
Just watching your video again and I see two boxes one Esab plasma torch box and one Mectronics box. Did you build the machine yourself or is it a factory built machine?
I also see what appears to be a floating torch holder perhaps with a switch for finding material height. If that is the case you want to connect that switch to motion.probe.input in your HAL file. Once you have made the connection to motion.probe.input you can use something like the following to position your torch tip.
Does your Esab Plasma torch have any signals like Arc OK and Arc Voltage?
John
I also see what appears to be a floating torch holder perhaps with a switch for finding material height. If that is the case you want to connect that switch to motion.probe.input in your HAL file. Once you have made the connection to motion.probe.input you can use something like the following to position your torch tip.
G38.2 Z-1.75 (Probe to find the surface)
G91 (Incremental Distance Mode)
G1 Z0.070 (Raise up to Z0 and take out backlash from switch)
G90 (Absolute Distance Mode)
G92 Z0 (Set Z0 for this cut)
G1 Z#1
... (fire torch and cut part)
G92.1 (Remove offset)Does your Esab Plasma torch have any signals like Arc OK and Arc Voltage?
John
Please Log in or Create an account to join the conversation.
17 Jul 2012 11:43 #22070
by ricky_a
Replied by ricky_a on topic Re:Setup for plasma cutting need help
The esab is a welder.
The cnc table is homemade with a floating tourch holder
And the migatronic is our plasma
The cnc table is homemade with a floating tourch holder
And the migatronic is our plasma
Please Log in or Create an account to join the conversation.
17 Jul 2012 11:56 #22071
by BigJohnT
Replied by BigJohnT on topic Re:Setup for plasma cutting need help
Ok, do you have signals from the Migatronic like Arc Ok or Arc Voltage?
The switch on the floating holder can be connected to your breakout board input then in HAL you connect that input to motion.probe.input like so
net torch-probe motion.probe-input <= parport.0.pin-13-in-not
or what ever pin you wish.
Now you can use the code I posted to find the material top.
John
The switch on the floating holder can be connected to your breakout board input then in HAL you connect that input to motion.probe.input like so
net torch-probe motion.probe-input <= parport.0.pin-13-in-not
or what ever pin you wish.
Now you can use the code I posted to find the material top.
John
Please Log in or Create an account to join the conversation.
17 Jul 2012 12:02 #22072
by ricky_a
Replied by ricky_a on topic Re:Setup for plasma cutting need help
There is arc OK but not arc Voltage
Please Log in or Create an account to join the conversation.
17 Jul 2012 13:13 #22073
by BigJohnT
Replied by BigJohnT on topic Re:Setup for plasma cutting need help
Ok, you can connect that to motion.digital-in and use that to wait for the arc before proceeding with the cut.
Of course using what ever in pin you choose.
And in your code after issuing a M3 you do a M66 as shown in the sub below. The following subroutine is what I call after moving to the start position for the cut. It finds the material top, moves to pierce height, starts the torch, waits for Arc Ok then moves to cut height
This is an example of how I call the touchoff subroutine.
As for Torch Height Control (THC) I cut for a year without one just by careful placement of my material on the slats and making sure it is flat.
John
net start-motion motion.digital-in-00 <= parport.0.pin-15-inOf course using what ever in pin you choose.
And in your code after issuing a M3 you do a M66 as shown in the sub below. The following subroutine is what I call after moving to the start position for the cut. It finds the material top, moves to pierce height, starts the torch, waits for Arc Ok then moves to cut height
o<touchoff> sub
(#1 pierce height, #2 pierce delay, #3 cut height)
F10
G38.2 Z-1.75 (Probe to find the surface)
G91
G1 Z0.070 (Raise up to Z0)
G90
G92 Z0 (Set Z0)
G1 Z#1
M3 S1
M66 P0 L1 Q5 (Wait for Arc OK from Torch)
G4 P#2 (Pause for pierce delay)
F25
Z#3 (goto cut height)
o<touchoff> endsub
M2This is an example of how I call the touchoff subroutine.
(move to start postion)
o<touchoff> call [0.125][0][0.080]
Fn (set cutting speed)
...( cut profile)
M5 (turn off torch)
G92.1 (clear my G92 offset)
G0 Z0 (move the torch up to clearance height)
M2As for Torch Height Control (THC) I cut for a year without one just by careful placement of my material on the slats and making sure it is flat.
John
Please Log in or Create an account to join the conversation.
17 Jul 2012 13:19 #22074
by andypugh
Replied by andypugh on topic Re:Setup for plasma cutting need help
BigJohnT wrote:
If the torch is being controlled as a "spindle" then wouldn't connection to motion.spindle-at-speed automatically pause cutting?
Ok, you can connect that to motion.digital-in and use that to wait for the arc before proceeding with the cut.
If the torch is being controlled as a "spindle" then wouldn't connection to motion.spindle-at-speed automatically pause cutting?
Please Log in or Create an account to join the conversation.
17 Jul 2012 13:53 #22078
by BigJohnT
Replied by BigJohnT on topic Re:Setup for plasma cutting need help
Hmmm, never thought of trying that Andy, IIRC motion.spindle-at-speed only needs a rising edge input so it won't matter if the Arc Ok signal stayed on or not.
Good Idea!
John
Good Idea!
John
Please Log in or Create an account to join the conversation.
19 Jul 2012 08:05 #22173
by ricky_a
Replied by ricky_a on topic Re:Setup for plasma cutting need help
Thanks for all your help so far
Greetings Ricky and Jacky
Greetings Ricky and Jacky
Please Log in or Create an account to join the conversation.
Time to create page: 0.112 seconds