bridgeport series 1 cnc linuxcnc help

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16 May 2023 00:51 #271432 by steevgg
i would like some help in converting this to linuxcnc
what would i need, to be able to convert it ? can i use old electroics and put in a new board for linuxcnc which one is recommened and thats in stock

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16 May 2023 12:49 #271455 by andypugh
It looks like DC servos, probably +/-10V control.

Do you have a PC with PCI or PCIe ? Or would you prefer to connect via Ethernet?
The 7i97 would be a good choice, except that they are out of stock.
So perhaps
store.mesanet.com/index.php?route=produc...83_85&product_id=379
and
store.mesanet.com/index.php?route=produc...id=120&search=analog

There are also options using the parallel port (as a communications bus, not bit-bashing)

pico-systems.com/PPMC.html

Or
store.mesanet.com/index.php?route=produc...ct_id=70&search=7i43
and
store.mesanet.com/index.php?route=produc...=83_86&product_id=74

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16 May 2023 19:17 - 16 May 2023 20:06 #271464 by smc.collins
does the machine currently operate ???

it matters for figuring things out. a friend of mine has the same machine, but he had anilam controls, we're replacing the servos etc, his motors are really worn. 
Last edit: 16 May 2023 20:06 by smc.collins.

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16 May 2023 22:28 #271480 by steevgg
yes it ran before i picked it up mine has the contraves dc servos
i would eventually want to upgrade the nc400 drives to something more modern as well but for right now just want to get it running on linuxcnc

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16 May 2023 22:32 #271482 by steevgg
yeah i have a PC is there a difference in using Ethernet over pcie
yes mostly everything is out of stock
i did find a 5i25 on ebay would that work ?

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16 May 2023 22:44 #271484 by tommylight
As far as i can gather, Mesa 7i96S and Mesa 7i77 are available most of the time, so maybe go for that?
It is the most versatile combo for sure, 5 stepgens, 1 spindle, 6 of +-10V PWM one of those is for spindle or servo, plenty of IO, plenty of SSerial for expansions just in case, etc etc.
The difference in price should be 50 to 80$ more, not sure as i have not looked at those in a while.

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17 May 2023 02:00 - 17 May 2023 02:01 #271494 by smc.collins
kb electronics has some affordable dc drives, as does pico systems. if you watch out, you can occasionally pickup glentek drives in ebay for a song, the pwm brush dc drives are superb
Last edit: 17 May 2023 02:01 by smc.collins.

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17 May 2023 15:24 - 17 May 2023 15:25 #271544 by andypugh

yeah i have a PC is there a difference in using Ethernet over pcie


No, they all work almost exactly the same. (I seem to recall that the actual best performance FPGA card is the EPP-interfaced 7i43).
But they all have lots more capability than is needed for LinuxCNC applications.

i did find a 5i25 on ebay would that work ?

In Cyprus? I am puzzled by those (ie, why he has so many). 5i25 works great (you would pair it with a 7i77) but you need a full-size PCI slot.
Last edit: 17 May 2023 15:25 by andypugh.

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17 May 2023 15:48 #271545 by andypugh

i did find a 5i25 on ebay would that work ?

In Cyprus?


Now even more puzzled, as it says "Vilnius, Cyprus" (Vilnius is not in Cyprus) but it is a UK seller.
The following user(s) said Thank You: tommylight

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17 May 2023 21:45 #271570 by steevgg
yeah i wondered too why he has so many unless he works for them lol

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