Control of a vacuum pump

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15 Dec 2022 08:39 - 15 Dec 2022 14:27 #259545 by mgm
Control of a vacuum pump was created by mgm
I got myself a vacuum pump which I now want to control with LCNC.

I have the following possibilities to connect it:

 

I have the following components:
- Mesa 7i76ED with 7i84D via RS422.
- Bit-file on the 7i76e is "7i76e_7i76x1_5abobpD".
- on P1 parallel expansion is connected a 7i75.

I need a 0-10V signal at the analog input (X10:3).

Can I do this with my Hardwear or do I need something additional?
TB4 of the 7i76ED is already occupied by the spindle!
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Last edit: 15 Dec 2022 14:27 by mgm.

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15 Dec 2022 22:34 #259594 by PCW
Replied by PCW on topic Control of a vacuum pump
Depending on whats connected to the 7I75, one possibility is to use
a "Mach 5 axis BOB" on P1, that would an additional analog output

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16 Dec 2022 07:51 - 16 Dec 2022 08:05 #259613 by mgm
Replied by mgm on topic Control of a vacuum pump
At the 7i75 I have a PWM connected nothing else!
I still have a BOB ....

Do I have to change something in the bitfile?

Or would I have to replace the 7i75 with the BOB?
Last edit: 16 Dec 2022 08:05 by mgm.

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20 Dec 2022 12:03 #259950 by mgm
Replied by mgm on topic Control of a vacuum pump
Is it possible to run the 7i76ED and a Mach 5 axis BOB connected to the parallel port at the same time? to get an additional connection with 0-10V from the BOB.

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20 Dec 2022 15:28 #259959 by PCW
Replied by PCW on topic Control of a vacuum pump
Yes, you can connect a Mach 5 Axis BOB to one of the 7I76E expansion ports
and use 7i76e_7i76x1_5abobD.bit firmware.

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20 Dec 2022 16:32 #259965 by mgm
Replied by mgm on topic Control of a vacuum pump
I assume that it also works with this bit file!?!

7i76e_7i76x1_5abobpD.bit

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20 Dec 2022 16:35 #259966 by PCW
Replied by PCW on topic Control of a vacuum pump
Yes, that one replaces some of the 5ABOBs step/dir channels with PWM

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20 Dec 2022 17:14 #259969 by mgm
Replied by mgm on topic Control of a vacuum pump
and I can continue to use my 7i75?

so the 7i75 to P1 AND BOB to P2 is that right?

or do I have to remove the BOB at P1 and the 7I75 again?

The 7i75 is for the one PWM output!

But if you say that it replaces some Step/Dir then I can certainly connect a PWM to the Step/DIR!

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20 Dec 2022 18:15 #259972 by PCW
Replied by PCW on topic Control of a vacuum pump
You could use a PWM output from the BOB instead

The 7i76e_7i76x1_5abobpD.bit configuration has only GPIO on P2

(take a look at the .pin files for pinout information)

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21 Dec 2022 01:16 #259989 by andypugh
Replied by andypugh on topic Control of a vacuum pump

Is it possible to run the 7i76ED and a Mach 5 axis BOB connected to the parallel port at the same time? to get an additional connection with 0-10V from the BOB.

Yes, you can run any combination of hardware, so you can run any number of parallel ports alongside any combination of Mesa cards. 

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