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Yes, this is one of the methods that I tested with great success, eventually I added a large coil in series to stabilize the charging current.
You have a very lot of knowledge so I think that you will be able to create such a open-source sensor using any of basic methods. The easiest way is to use one of ready to use CHIPs that you gave as an example ( now i haven't time to analise it / *conversion time should be fast ) or add any converter to good and very cheap BCL 1-3MHz generator.
I everything projected handly without use ready to use external chips but it required a huge amount of time for experiments and optimal selection of component values. It was not easy.

I know 2.9 doesn't have change_g43.ngc.
That's why I searched gmoccapy.ini to find the location of the template configuration files.

Do you think the location of the template configuration files is different for 2.9 and 2.10?

Had these message come up, sorry no screen shot, in the forum. I replaced actual emails with xxxNoticeSMTP Error: The following recipients failed: This email address is being protected from spambots. You need JavaScript enabled to view it.: : Recipient address rejected: Policy Rejection- Quota exceeded. help.dreamhost.com/hc/en-us/articles/215...MTP-quota-limitsSMTP Error: The following recipients failed: This email address is being protected from spambots. You need JavaScript enabled to view it.: : Recipient address rejected: Policy Rejection- Quota exceeded. help.dreamhost.com/hc/en-us/articles/215...MTP-quota-limitsSMTP Error: The following recipients failed: This email address is being protected from spambots. You need JavaScript enabled to view it.: : Recipient address rejected: Policy Rejection- Quota exceeded. help.dreamhost.com/hc/en-us/articles/215...MTP-quota-limitsSMTP Error: The following recipients failed: This email address is being protected from spambots. You need JavaScript enabled to view it.: : Recipient address rejected: Policy Rejection- Quota exceeded. help.dreamhost.com/hc/en-us/articles/215...37-SMTP-quota-limits

 

You're just making life hard for yourself if you want a reliable solution. But if you want to go down that path good luck.

Firstly I read this:
linuxcnc.org/docs/html/man/man9/hal_parport.9.html
Then read:
github.com/LinuxCNC/linuxcnc/blob/master...rivers/hal_parport.c

That should give you an insight into the hal parallel port driver works.

Now the task would be writing a realtime driver that mimics the functions of the haL-parport driver and talks to the the ethercat hardware. Once again the limiting factor will be the latency as this will affect the base thread period and the step speed.

Personally I think a Mesa card, 7i92 would be a simple upgrade to a 2 port parallel port system, is the way to go. This is the most mature & supported option.

There are also 2 really well supported & mature projects, Remora & Linuxcnc-RIO that can be used instead of want you want to do.

BTW I have created a couple of boards to use with an FPGA that can be used with Linuxcnc-RIO that will give you about 3x17 pin ports that can be used with a chinese breakout board, 1x12 pin port a 1x6 pin port and a 1x3 pin port.
This can also run modified Mesa 7c81 firmware to either connect to an RPi4/5 or (probably not of interest to you) to a PC via EPP interface.
I'm also toying with the idea of an Ethernet interface as well, but this is just in the "what if" stages.

Hello. I have carefully looked at the circuit diagram. I am testing with reference to the circuit diagram you uploaded with yaskawa cpcr-mr154g. There is one critical problem. When I input pin 2-3 and 2-4 to dc0v and input pin 3-1 to 24V+ and then turn on the power, the speed accelerates even without any input to the speed reference (pin 1-2, 1-19). I need to use this drive for PID control, so control through the speed reference is absolutely necessary. Please help me.

This is the full error
 

If i set non zero update-hz problem of crazy data reading on encoders stop
but also stops working modbus device so no solution here..

I'm not chasing better performance. I'm chasing a configuration that will work with modern hardware (no slots or parallel ports). I thought ethercat might be a means of getting there. I saw the above post and assumed that this hardware would do what I wanted.

stiickies?
I have a working config using 2 parallel ports. Can I start with that?
I am using closed loop steppers.
I undestand that I will have to add invert pins etc.
The reset pin has me confused. Is it to generate a particular pulse width?

JTknives wrote:

I just watched your YouTube video on you high speed ohmic and it’s impressive. 

I assume you mean this one

I had a job which I filled a 8' x 4' sheet with some flanges and small parts. I cut it in 3 sections on a 4' x 4' table and there were heaps of probing so over time I tweaked the probing routine heights etc. I was using my hypersensing which uses a THCAD for the ohmic sensing. it does not like Hypertherm machines on a water table but it would work for you by the look.

Part of the speed comes from the way it breaks contact on up travel because as soon as it senses a fall in voltage, probing finishes (before the contact is broken).
I've been sent a ohmic circuit from Proma Elextronika in Poland. Its a very nice piece of kit and have some very good reviews on it. This will by my water table solution.

Aciera wrote:

The documentation is outdated, try clicking on the colored channel buttons on the bottom of the screen to toggle channels on/off. Eg the red button with '1' on it.

Fixed in github.com/LinuxCNC/linuxcnc/commit/e412...449b7450922240e9b9c1

    Hello, I have a machine with 32gb of RAM and an i5, QTdragon fails to visualize gcode files over 20-30mb. The RAM is not even loaded. What could be the problem and how to solve it? Instead of a program, a box within machine bounds is displayed.

Sorry for the late message. Unfortunately I had to give the project less priority. 
At the moment very busy with my full time work, my own company and graduating from my bachelor mechanical engineering next to a more than full-time job. 

I am slowly designing further on the mechanical part during my breaks. The hardware will be a pc that runs on plasmac in combination with a mesa board and a thcad. 

The drive will be a belt, I do not believe that this stretch is noticeable under the load of plasma cutting. Much cheaper and simpler in design than rack and pinion.

 

unknown wrote:

Dude please don't change the subject, it makes things hard. I check this thread regularly.

I think it is useful to change the title from
"Linuxcnc & the Rpasberry Pi"
to that 
"Linuxcnc & the Raspberry Pi"

Royka,
I hope you don't mind  linking to your 6.12 kernel from my how to document
docs.google.com/document/d/1jeV_4VKzVmOI...diY/edit?usp=sharing