Schaublin 125-CNC retrofit.

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07 Mar 2021 15:34 #201299 by andypugh

RotarySMP wrote: The 7i98 or 7i94 would be cool, but I don't see a DB25 daughter card which supports servos. The 7i33 needs a 50pin FPGA Card right?


50-pin + smart-serial can work well if you have a PCI PCI-e slot. The 5i24 / 6i24 are a lot of pins for the money, and are what run my lathe.

(My lathe is 6i24 7i49 7i44 7i84 7i73 2x8i20 and has a whole 50-pin connector free.)

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07 Mar 2021 15:38 #201300 by andypugh

PCW wrote: Unfortunately we don't have any low channel count analog 25 pin daughtercards
Probably the best would be a 7I94+ 7I77 combination


How about the 7i83?
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07 Mar 2021 16:22 - 07 Mar 2021 16:27 #201309 by J Green
Replied by J Green on topic Schaublin 125-CNC retrofit.
Mark Are you considering future servo driven Live Tooling on the extra turret , that all us viewers are going to want ?

Thin wall 1/16 inch casting and cheap vacuum accessory
Last edit: 07 Mar 2021 16:27 by J Green.
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07 Mar 2021 17:06 #201316 by RotarySMP
Wonder how I missed the 7i83?

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07 Mar 2021 17:45 - 07 Mar 2021 17:46 #201320 by PCW
Replied by PCW on topic Schaublin 125-CNC retrofit.
You still need the encoder inputs
One possibility is a 7I92+ 7I85 +7I83
Last edit: 07 Mar 2021 17:46 by PCW.
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07 Mar 2021 18:56 #201326 by RotarySMP
Why the 7i92, if only using SS daughter cards, the 7i94 would be a better fit wouldn't it, or is there no LinuxCNC HM2 driver support for it?
7i94 - Brain
7i83 - Analog motors
7i84 - IO
7i85 - Encoders
7i73 - Control module.

That set pretty much duplicates while a liitle cheaper than 7i97/7i74/7i73/7i84 with a smaller footprint, if I can make up something to stack the 7i94, 7i83/7i84/i85 vertically if the space gets too tight.

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07 Mar 2021 18:57 #201327 by RotarySMP
Bob, did you watch his follow on video with the motor cooling fins? Excellent.

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07 Mar 2021 19:23 #201335 by PCW
Replied by PCW on topic Schaublin 125-CNC retrofit.
The 7I85 already has 5 sserial channels so a 7I92 is a bit cheaper
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07 Mar 2021 20:18 #201350 by RotarySMP
Thanks, save €65 verse butcher 4 Cat 6 cables, pretty good deal, thanks.

Just wondering, by why not just put RJ45 sockets on all the boards which have RS-422 ports? They'd be cheaper than the plug in screw connections, easier to to fab, and easier for the user to integrate.
Mark

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07 Mar 2021 20:22 #201351 by J Green
Replied by J Green on topic Schaublin 125-CNC retrofit.
Mark
Yes , I watched many of his casting videos some of which show details about his electric melting furnace construction . ( electric heating coil type furnaces tend to burn out quickly at cast iron temperatures )
Anyway, his video included a section of his vacuum pump which I thought might be interesting to you . As I was watching his Lost Foam technique wondered if 3D printing a female mould an then fill it with foam in a can insulation stuff could work for making lost foam patterns .
Break time is over - back to the Schaublin 125-CNC retrofit.
Bob

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