On 3/28/25 10:43, Sam Sokolik wrote:
It is still in the docs..
https://linuxcnc.org/docs/stable/html/drivers/servo-to-go.html
On Fri, Mar 28, 2025 at 9:25 AM Dave Engvall <dengv...@charter.net> wrote:
Is there any support for the stg card do I own an orphan?
it does look like it is, the link to the stg site now hits what looks
like an Indonesian casino site with what we in broadcasting would call
T&A when the weather girl was talking about the forecast., on the front
page .
The LINUXCNC docs show what would be a very good card if it was remade
to fit modern PCI-like busses. But keep in mind the note about later
model ATX power supplies don't run the DAC's as variables. On the pi,
an ISA buss could probably be simulated with gpio but that's beyond my
pay grade at 90 yo.
On my pi driven Sheldon lathe, I am quite happy with the 3 wire SPI buss
driving a 7i90HD, but that also needed 3 7i42TA buffer cards to isolate
the 7i90HD from the ringing as the 7i90HD's I/O is directly connected to
the 3 volt FPGA. That gives a total of 72 I/O pins but w/o the ADC's.
Single point grounding is a must do. Currently the motors are 3 phase
closed loop stepper/servo's, which do precisely what the TP tells them
to do. No loss of "home" for any reason has occurred since installing
them. The drivers have an output if they do lose home, shuts the whole
thing down in about a millisecond, but has never happened while making
hot swarf.
Dave
Cheers, Gene Heskett, CET.
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
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