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Tutorial 15



JT

tommylight wrote:

Would this be better in the "LinuxCNC documents" section?
 

This is a very sensible suggestion - not sure why I didn't but probably because my question evolved as I wrote it!

Many of the later GUI's introduced a ton of extra ini settings, the authors of those GUI's should update the docs if they moved from display to spindle. I really don't understand why they didn't use the existing ini entries...

JT

What resistor value would you use between positive of the isolated power supply and the positive input of the THCAD ?

Get the Mesa 7i85, without the S.
And THCAD5 or 10 and 2 of 1MOhm/2W resistors, it is most probably a HF/HV pilot start plasma, and 300 is not recomended for those, although i am sure it works, i have several of those in daily use.
For power supplies, 5V and 24V, both at 5A should do just fine, MeanWell or Delta preferably.

Hello,

okay thank you.
One other question about the G-Code. Where can I read about the supported G-Code for Linux CNC and what kind of postprozessor I have to use or setup.
I need some bore cycles and helix in all 3 axis...

Have a nice day
Martin

I can solve above error by changing to :

#net x-home-request joint.0.request-cia402-homing => cia402.0.home
setp joint.0.request-cia402-homing true
net x-homing joint.0.is-cia402-homing <= cia402.0.stat-homing
net x-homed joint.0.cia402-homing-finished <= cia402.0.stat-homed

but the motor still not move.

My toolchange uses two custom hydraulic rams in top z position to release the tool.
They are leaking and I am not sure if I can fix them. An alternative would be to make them fixed and move Z up to release the tool. 
But this has to be avoided during normal usage.
The reference switch is at the end of the tool change travel. So I could use this as a combined end and reference switch.
But I would need to be able to move over this point for toolchange. 
Is ip possible to set something like this up?

Thanks Patrick

if I use cia402_homecomp, I got following error during lcnc start :
parameter or pin 'joint.0.request-custom-homing' not found

The underlying problem may be that GUIs handle this differently (ie have not been updated to the new [SPINDLE_n] section) but I'm not sure.

Please raise an issue so it does not get lost.

I've added linuxmint to the list of distros, thanks for the feedback.

JT

If you are following Rods method why are you not using his 'cia402_homecomp.comp' he describes on his page?

I think that might be possible using a python remap for 'T'. The remap is executed by the read ahead and could start the tool search through hal.

[edit]

Just gave this a try and it looks like it might work:

with this in the [RS274NGC] section of the ini file:

You will also need to configure python:
linuxcnc.org/docs/devel/html/remap/remap...emap:embedded-python

For sim config on python remap see:
configs/sim/axis/remap/getting-started

Hi,

Yup, new version mesact_2.1.7_amd64_1 reports as linuxmint also

Thanks

Okay so im putting together a parts list to get started with this build. I put power to the driver box, tripped the contactor with a screw driver and a green light comes on the power board and fan runs. im not sure what else I could do to test it besides connecting the burny 10 back up.
So far in my parts list I have

7I83 Analog output/ analog servo interface
7I85S 4 Channel encoder, 8 differential output 1 channel Serial RS-422 interface
THCAD-300 High isolation A-D accessory (Go to replacement: THCAD2)
7I96S STEP/IO Step & dir plus I/O card

I am going to assume that I can hook straight up to the raw arc voltage of the hypertherm ht2000 with the thcad-300. Is there any advantage to a voltage divider board other then the potential risk of electrical shock? Will I need a power supply to go along with these boards? do you have any recommendations for a reliable one on my previous build I used a cheapo china one and the fan stopped working a while ago.