Try to make a prototype mesa 7i92 board

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26 Oct 2019 17:00 - 26 Oct 2019 17:01 #148843 by PCW
I would tend to Echo tommyilght thoughts here.

If your end goal is to get a working CNC machine, start with a parallel port and get
your machine running. If the parallel port limitations become a economic limitation
(the machine speed is too low and the limitation is the parallel port step rate)
then consider other hardware (Mesa, PicoSystems, EtherCAT etc)

I dont mind publishing 7I92 schematics but re-creating a 7I92 for a one-off project
is not economic.
Last edit: 26 Oct 2019 17:01 by PCW.
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26 Oct 2019 18:43 #148848 by Todd Zuercher
I'm not going to say you can or can't, but I doubt you'll find much help here. Peter and his hardware have been very supportive of the Linuxcnc community.
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27 Oct 2019 11:45 #148875 by pl7i92
you can even run 4 China Bobs on one PC this gives you alot of options at 200k/steps per second

so at low cost you wont go mesa just add 2 pci parport Cards

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27 Oct 2019 12:18 #148877 by bevins
They are 100.00.

You want it cheaper? lol

Stop drinking beer for a week and buy one.

No one has a broken mesa board. Why? Because they don't break......
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27 Oct 2019 16:54 #148899 by tommylight

bevins wrote:
Stop drinking beer for a week and buy one.

LOL

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27 Oct 2019 17:20 - 27 Oct 2019 17:21 #148901 by Dinuka_Shehan
Beer is less $2 here and the interesting thing is I don't drink beer or any kind of liqueurs or not even smoke.

No lol.:angry:

No beer no mesa
#live life easy
:P
Last edit: 27 Oct 2019 17:21 by Dinuka_Shehan.

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28 Oct 2019 00:31 #148948 by andypugh
Just to add to the info here. There is a guy in Bulgaria makes his own Mesa-like cards. They run the Mesa firmware, but have his own custom hardware on the board for a specific application.

So, it can be done, and the PCBs can be cheap now. But low volumes of parts can very quickly get you to the same as it would have cost to buy the assembled board.

And the STMBL servo drives "pretend" to be Mesa smart-serial devices, though using no Mesa code, as they use an STM32 not an FPGA.

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28 Oct 2019 02:57 - 28 Oct 2019 03:01 #148957 by Dinuka_Shehan
Dear andypugh,
Can I have contact details of Bulgarian guy.
Thanks
Last edit: 28 Oct 2019 03:01 by Dinuka_Shehan.

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