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11 Dec 2012 17:38
Replied by the_muck on topic Plasma THC300 Z Axis trouble

Plasma THC300 Z Axis trouble

Category: Basic Configuration

Hallo,
now i have changed to try a nother config, there is no documentation for THC 300 and i cant understand how it works and what the problem is.

linuxcnc.org/lucid/emc2/index.php/forum/...2&lang=italian#15198

you need the LinuxCNC dev package, and install the *.comp file.

In this moment it works not 100%, but i think it is better to understand.
10 Dec 2012 21:02
Replied by BigJohnT on topic Plasma THC300 Z Axis trouble

Plasma THC300 Z Axis trouble

Category: Basic Configuration

Yes, the Plasma 5i20 config is what I used until I converted to a 5i25 7i76.

John
10 Dec 2012 20:59
Replied by andypugh on topic Plasma THC300 Z Axis trouble

Plasma THC300 Z Axis trouble

Category: Basic Configuration

Is there a simpler sample config using the THC component?
10 Dec 2012 20:53
Replied by BigJohnT on topic Plasma THC300 Z Axis trouble

Plasma THC300 Z Axis trouble

Category: Basic Configuration

He's using the THC300 config and the THC control is all done with hundreds of HAL components. It's so complex that it includes an Open Office Drawing that needs to be printed out on a D size plotter. I never could follow the logic of that one.

John
10 Dec 2012 19:54
Replied by andypugh on topic Plasma THC300 Z Axis trouble

Plasma THC300 Z Axis trouble

Category: Basic Configuration

I have make a new config. with plasma THC300, just invert the estop and float switch pin that it runs. The same problem, when i make a 0 point the Z axis value in Linux CNC move up and down!


Sorry for the delay in replying.
Does this still happen with the THC disabled? am wondering if it is something wierd with the way that THC "lies" about the Z-position to the rest of the system.
Does the actual Z axis move, or just the DRO?
04 Dec 2012 23:30 - 05 Dec 2012 20:23
Plasma THC300 Z Axis trouble was created by the_muck

Plasma THC300 Z Axis trouble

Category: Basic Configuration

Hallo,
sorry for my bad englisch ;).

I start to config EMC for Plasma cutting and have a lot of trouble. I use the basic config plasma THC300, changed Ports, Axis speeds, Limits...

When i make in World mode a new 0 Point, the Z Axis Move Down from +150 to 0 and back to +150, that is wehen i zero any axis. and i can not adjust the Speed of the Z Axis when they do this. So it is not possible to zero. Where is the point to set the "length" to the Float Switsch and is there a Documentation for this config?

The A motor not jog in Joint Mode by hand, thats very bad wenn the A axis not jog.

What make Travel Height and Sw. Travel?

Edit:

I have make a new config. with plasma THC300, just invert the estop and float switch pin that it runs. The same problem, when i make a 0 point the Z axis value in Linux CNC move up and down!

Thanks
20 Nov 2012 21:15 - 20 Nov 2012 21:15
Replied by BigJohnT on topic THC issue

THC issue

Category: Advanced Configuration

What kind of THC do you have?

WOW I just looked at that config and what a busy HAL config that even comes with a drawing.

John
20 Nov 2012 11:08
THC issue was created by chopper79

THC issue

Category: Advanced Configuration

Hello,

New here so forgive my ignorance of some of the questions.

I have modified the TH300 configuration for my plasma.It functions fine excluding the float switch. The issue is when I go to run a program it tries to go past the float switch and makes the motor lose position.

I could figure it out on my own I do believe if I just new what all the different parameters for the THC configuration were. The ones I am not sure on how to adjust for my z travel and switch location on the Z axis and the float switch. Could somebody could enlighten me on this please?

The other issue I am having is that when I go to run a program the Z axis goes up to some unknown height and hits the limit switch. I can not find anything in the config file or the Gcode telling it o go up to a random height. Could somebody could enlighten me on this issue also please?

Hope my questions are not to plan and if there is any information you need please let me know and I will check back periodically to see if there is any additional information needed.

Thanks

Chop
22 Mar 2012 21:21
Replied by BigJohnT on topic THC Component

THC Component

Category: HAL

Normally it is not good etiquette to hijack a thread but rather better to start your own so threads don't run on forever.

Are you enabling the thc component when your ready to use it? I have a pyvcp checkbox that is connected to thc.enable in my hal file. If you don't enable the thc component it simply passes the Z commanded position through to the stepgen.

All my config files are on my web site for my plasma.

Your hal connections seem to be correct.

John
22 Mar 2012 04:19
Replied by tensaiteki on topic THC Component

THC Component

Category: HAL

In this comment in another thread -> www.linuxcnc.org/index.php/english/compo...atid=27&id=3980#4002 <- BigJohnT attached a plasma.zip file that includes the HAL file he uses on his plasma (plasma.hal). The Z-axis section in his HAL contains lines that according to the coments "hijack position command and feed through thc":
# position command and feedback
# hijack position command and feed through thc
net emcmot.02.pos-cmd thc.z-pos-in <= axis.2.motor-pos-cmd
net thc-pos-cmd thc.z-pos-out => hm2_[HOSTMOT2](BOARD).0.stepgen.02.position-cmd
net motor.02.pos-fb axis.2.motor-pos-fb <= thc.z-fb-out

Whereas, the corresponding Z-axis section from my HAL looked like this (before I started futzing around with it):
net z-pos-fb     axis.2.motor-pos-fb   <=  hm2_5i25.0.stepgen.02.position-fb
net z-pos-cmd    axis.2.motor-pos-cmd  =>  hm2_5i25.0.stepgen.02.position-cmd
net z-enable     axis.2.amp-enable-out =>  hm2_5i25.0.stepgen.02.enable

I just don't know the HAL code to know what I need to modify from that section to work with my setup, I'm pretty sure "emcmot.02.pos-cmd" is going to have to change since it doesn't appear anywhere else in my HAL file. Beyond that I don't even know where to begin modifying it.
22 Mar 2012 03:10
Replied by PCW on topic THC Component

THC Component

Category: HAL

theres no any indication of the THCs connections here

(man THC shows the basic connections)
22 Mar 2012 00:45
Replied by tensaiteki on topic THC Component

THC Component

Category: HAL

I hope this is an acceptable thread to put this in...

I'm having trouble getting my HAL file setup correctly with the THC component. I have the touch probe, arc-ok, and THC encoder set up and working, but I'm lost as to how to get the THC to take control of the Z-axis. I'm kind of a HAL n00b as all the other machines I've built only required minor tweaks to the ini files.

Here's the part of the HAL that deals with the Z-axis (obviously I have no idea what I'm doing):
#*******************
#  AXIS Z
#*******************

# Step Gen signals/setup

setp   hm2_5i25.0.stepgen.02.dirsetup        [AXIS_2]DIRSETUP
setp   hm2_5i25.0.stepgen.02.dirhold         [AXIS_2]DIRHOLD
setp   hm2_5i25.0.stepgen.02.steplen         [AXIS_2]STEPLEN
setp   hm2_5i25.0.stepgen.02.stepspace       [AXIS_2]STEPSPACE
setp   hm2_5i25.0.stepgen.02.position-scale  [AXIS_2]STEP_SCALE
setp   hm2_5i25.0.stepgen.02.step_type        0
setp   hm2_5i25.0.stepgen.02.control-type     0
setp   hm2_5i25.0.stepgen.02.maxaccel        [AXIS_2]MAX_ACCELERATION
setp   hm2_5i25.0.stepgen.02.maxvel          [AXIS_2]MAX_VELOCITY

net z-enable     axis.2.amp-enable-out =>  hm2_5i25.0.stepgen.02.enable


# position command and feedback
# hijack position command and feed through thc
net z-pos-cmd thc.z-pos-in <= axis.2.motor-pos-cmd
net thc-pos-cmd thc.z-pos-out => hm2_5i25.0.stepgen.02.position-cmd
net z-pos-fb axis.2.motor-pos-fb <= thc.z-fb-out
#net z-pos-fb     axis.2.motor-pos-fb   <=  hm2_5i25.0.stepgen.02.position-fb
#net z-pos-cmd    axis.2.motor-pos-cmd  =>  hm2_5i25.0.stepgen.02.position-cmd
net z-enable     axis.2.amp-enable-out =>  hm2_5i25.0.stepgen.02.enable

With what I have now, I can start LinuxCNC, jog, home, and run g-code normally but the Z-axis never moves with the voltage (THC is enabled, machine is at velocity, and arc has transferred).

I'll also attach the full INI file. Also, in case it is relevant, I'm running gantrykins (dunno, if it conflicts or something with the THC control).

File Attachment:

File Name: cncplasma.ini
File Size:4 KB
13 Mar 2012 17:18
Replied by BigJohnT on topic THC Component

THC Component

Category: HAL

It has a floating head so I can't damage it...

Thanks
John
13 Mar 2012 16:54
Replied by PCW on topic THC Component

THC Component

Category: HAL

I _think_ I got the drive direction right so be careful...

Also the next step would be a bound on the velocity,
that is bound the output of the "P" loop = (volts_requested - volts)*PGain;
so large voltage errors dont request greater than some maximum velocity
13 Mar 2012 15:44
Replied by BigJohnT on topic THC Component

THC Component

Category: HAL

Thanks Peter,

I'll give that a try here in a bit.

John
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