New retrofit

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15 Sep 2020 10:17 #182205 by mosoeng
New retrofit was created by mosoeng
I am attempting to retrofit a Boxford bench lathe with new servo drives and ac motors.
So we purchased the following kit www.motioncontrolproducts.co.uk/products...un-pronet-servo-kit/
and a Mesa 7i97 motion control ethernet card.
Can someone help me with wiring up the Mesa card to the PronetT-04A servo drive, and which mode of setup on the Pronet is the best
for a boxford 250 Lathe ie Analog speed control or Position control? there is 2 other modes not sure if they are relevant.
Also do we wire up the motor encoders to the Mesa board? the motors have 2 leads with plugs on the end that plug into the servo drive.
one is motor power and the other lead is the encoder.

thanks

Mike

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15 Sep 2020 13:49 - 15 Sep 2020 13:50 #182233 by PCW
Replied by PCW on topic New retrofit
For analog velocity control with AC servos, The encoder signals come from the drive,
not directly from the encoder. That is, the encoder connects to the drive and the drive
forwards the encoder data to the controller (LinuxCNC+7I97 in this case) The drive
manual should show the analog and quadrature signals that need to be connected
Last edit: 15 Sep 2020 13:50 by PCW.

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15 Sep 2020 14:07 #182235 by andypugh
Replied by andypugh on topic New retrofit
The data sheet isn't as informative as one might wish. I hope you have something a bit more detailed with the drives?

Anyway, I would configure for analogue speed control.
The Mesa encoder inputs (ABZ correspond to the outputs ABC on the drive, terminals 20/21 22/23 and 24/25 respectively. Configure for differential.

I am not sure if 50 - DGRND should be connected. PCW?

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15 Sep 2020 14:51 #182240 by PCW
Replied by PCW on topic New retrofit
I'm not sure of the best grounding strategy, but connecting the DGRND to 7I97 encoder GND is one way of establishing the common mode for the encoder signals.

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15 Sep 2020 15:29 #182242 by mosoeng
Replied by mosoeng on topic New retrofit
this is a link to the manual which the supplier sent me.
www.estuneurope.eu/wp-content/uploads/do...r-s-Manual-V2-11.pdf

Mike

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16 Sep 2020 09:46 - 16 Sep 2020 11:51 #182418 by mosoeng
Replied by mosoeng on topic New retrofit
Ok so thats the encoder sorted,
now the TB3 Analog interface on Mesa 7i97 would it be correct to wire up the following
TB3 Pin 1 ENA0+ to TREF+ to NC1 Pin 26
TB3 Pin 2 ENA0- to TREF- to NC1 Pin 27
TB3 Pin 3 GND to VREF- to NC1 Pin 2
TB3 Pin 4 AOUT to VREF+ to NC1 Pin1

is that all the connections I need to get the axis to jog/move with keyboard or is there something else to connect on mesa 7i97?

And thanks for you quick replies

Mike
Last edit: 16 Sep 2020 11:51 by mosoeng.

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16 Sep 2020 13:19 #182435 by PCW
Replied by PCW on topic New retrofit
TB3 Pin 1 ENA0+ to S-ON to NC1 Pin 14
TB3 Pin 2 ENA0- to 24V common
TB3 Pin 3 GND to VREF- to NC1 Pin 2
TB3 Pin 4 AOUT to VREF+ to NC1 Pin1
The following user(s) said Thank You: mosoeng

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