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  • timo
  • timo
14 Mar 2025 13:09

Building a 3-axis plasma table with mesa 7i96s, THCad-2 and nema23 steppers

Category: Show Your Stuff

Last i checked, something that comes close to QtPlasmaC in functionality (not in usability by far, much harder to use) was over 170000$ with a 300A plasma source that costs 84000$, leaving the machine price at 86000$ for 6X2.5M cut envelope!

Are you saying that plasma table you checked was about a quarter million? USD? 170 000 + 80 000 ?
  • prokopcio
  • prokopcio's Avatar
14 Mar 2025 12:51 - 14 Mar 2025 13:05

Laser Head Height Sensor – Looking for a Beta Tester

Category: Plasma & Laser

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.
  • zz912
  • zz912's Avatar
14 Mar 2025 12:30
Replied by zz912 on topic LCNC 2.10 - Ask for AUTOMATIC_G43

LCNC 2.10 - Ask for AUTOMATIC_G43

Category: Gmoccapy

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.
zdenek@cnc:~$ find / -name gmoccapy.ini 2>/dev/null
/home/zdenek/linuxcnc/linuxcnc-master/configs/sim/gmoccapy/gmoccapy.ini
/home/zdenek/linuxcnc/linuxcnc-2.9/configs/sim/gmoccapy/gmoccapy.ini
/usr/share/doc/linuxcnc/examples/sample-configs/sim/gmoccapy/gmoccapy.ini

Do you think the location of the template configuration files is different for 2.9 and 2.10?
  • unknown
  • unknown
14 Mar 2025 11:55
Funny message when reply to a topic was created by unknown

Funny message when reply to a topic

Category: Forum Questions

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

 
  • unknown
  • unknown
14 Mar 2025 11:51
Replied by unknown on topic SCATECH EV1616DN - Example config

SCATECH EV1616DN - Example config

Category: EtherCAT

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.
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