New Build King Rich KRV-3000 Knee Mill with GSK AC Servos DA98B driver

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dmbgo
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New Build King Rich KRV-3000 Knee Mill with GSK AC Servos DA98B driver

Post by dmbgo »

Hi, after several years I have gotten my spare Acorn board off the shelf and started to configure a new controller for my King Rich KRV3000 mill.

I have been using the Acorn board on my CQ6230 lathe for a couple of years now, with Adtech servos, with excellent results and no real issues.

My initial problem is getting the GSK DA98B AC Servo controller to work with the Acorn board. The DA98B AC Servo controller is driving a 110SJTM040D servo motor.
The motor was working fine on the mill, and was being driven by this particular GSK DA98B AC Servo controller.
20230525_111508.jpg

The GSK 980MDA on the mill drove the servo motors via a DB15 connector on the rear of the controller, and I have used the diagram in the 980MDA manual to replicate the servo drive connection as far as possible, (with my limited knowledge).
The factory cable from the DA98B AC Servo controller to the 980MDA, has a DB15 connector on the end going to the 980MDA and he factory cable's pin out was in the manual.
Acorn-Mill-initial setup.jpg
Here's how I have configured the servo driver connection to the Acorn so far, but it's not working yet:

Acorn Step (ST1) to DB15 pin 1 which is CPn+ and goes to DB44 pin 30 on the DA98B Servo driver (PULS+)
Acorn (COM) to DB15 pin 9 which is CPn- and goes to DB44 pin 15 on the DA98B Servo driver (PULS-)
Acorn (DIR) to DB15 pin 2 which is DIRn+ and goes to DB44 pin 29 on the DA98B Servo driver (SIGN+)
Acorn (COM) to DB15 pin 10 which is DIRn- and goes to DB44 PIN 14 on the DA98B Servo driver (SIGN-)

The signals from the servo driver that are not connected to the Acorn yet are:
DB15 pin 5 ALMn
DB15 pin 3 PCn
DB15 pin 11 0V
DB15 pin 4 +24v
King Rich Mill.jpg
I'm hoping someone has some knowledge of what the signals are and where to connect them, also any advice or observations about my existing connections would be welcome as well.
Thanks in advance
Dave
Last edited by dmbgo on Fri May 26, 2023 7:45 am, edited 4 times in total.
cnckeith
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Re: GSK Servo DA98B config for milling machine.

Post by cnckeith »

can you find the manual online to the DA98B AC Servo drive? if so, post a link here and that would give us a good idea on how to connect it up to the Acorn.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
dmbgo
Posts: 547
Joined: Sat Aug 15, 2020 9:21 pm
Acorn CNC Controller: Yes
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Oak CNC controller: No
CNC Control System Serial Number: 0035FF8A7F34-0730203594
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Bendigo Vic Australia
Contact:

Re: GSK Servo DA98B config for milling machine.

Post by dmbgo »

Sorry Keith, I meant to post it, but forgot.
dmbgo
Posts: 547
Joined: Sat Aug 15, 2020 9:21 pm
Acorn CNC Controller: Yes
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CNC Control System Serial Number: 0035FF8A7F34-0730203594
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Bendigo Vic Australia
Contact:

Re: GSK Servo DA98B config for milling machine.

Post by dmbgo »

This is the connection diagram for the interface between the DA98B and the GSK servo controller.

Well actually it's not, I get a message when I try to upload the diagram that says "Sorry the board attachment quota has been reached".
Last edited by dmbgo on Thu May 25, 2023 6:31 pm, edited 1 time in total.
dmbgo
Posts: 547
Joined: Sat Aug 15, 2020 9:21 pm
Acorn CNC Controller: Yes
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Oak CNC controller: No
CNC Control System Serial Number: 0035FF8A7F34-0730203594
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Bendigo Vic Australia
Contact:

Re: GSK Servo DA98B config for milling machine.

Post by dmbgo »

The connection diagram that I used as a starting point is on page 278 of this GSK980mda manual:
https://www.automationtechnologiesinc.c ... Manual.pdf
dmbgo
Posts: 547
Joined: Sat Aug 15, 2020 9:21 pm
Acorn CNC Controller: Yes
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CNC Control System Serial Number: 0035FF8A7F34-0730203594
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Bendigo Vic Australia
Contact:

Re: GSK Servo DA98B config for milling machine.

Post by dmbgo »

I'm still not sure that I have it right, since further reading has made me wonder if I am "sinking" or "sourcing" the signals. I think the way I have it connected I think I am "Sourcing" the signals, because I have the positive 24v step and direction outputs connected to the controller from the Acorn board, and the negative side of the Acorn power supply connected to the "common" terminal on the Acorn board, the step and direction outputs from the Acorn board connect to the +puls and +dir on the AC servo controller.
Should I try inverting the signals with the Acorn wizard to see what happens? Or alternatively, should I leave things alone and just swap the step and direction outputs, so that the active line is negative and make the common terminal on the Acorn +24v instead of -24v?
Last edited by dmbgo on Thu May 25, 2023 6:49 pm, edited 1 time in total.
cnckeith
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Re: GSK Servo DA98B config for milling machine.

Post by cnckeith »

dmbgo wrote: Thu May 25, 2023 12:24 am The connection diagram that I used as a starting point is on page 278 of this GSK980mda manual:
https://www.automationtechnologiesinc.c ... Manual.pdf
okie dokie, i asked chuck to take a look at it for you and provide some guidance.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
dmbgo
Posts: 547
Joined: Sat Aug 15, 2020 9:21 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: 0035FF8A7F34-0730203594
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Bendigo Vic Australia
Contact:

Re: GSK Servo DA98B config for milling machine.

Post by dmbgo »

Thanks Keith
dmbgo
Posts: 547
Joined: Sat Aug 15, 2020 9:21 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: 0035FF8A7F34-0730203594
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Bendigo Vic Australia
Contact:

Re: GSK Servo DA98B config for milling machine.

Post by dmbgo »

Here is the connection diagram provided by GSK between the GSK 980MDa CNC controller and the GSK DA98B AC servo drive.
GSK connection diagram DA98B to 980MDa.jpg
dmbgo
Posts: 547
Joined: Sat Aug 15, 2020 9:21 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: 0035FF8A7F34-0730203594
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
Location: Bendigo Vic Australia
Contact:

Re: GSK Servo DA98B config for milling machine.

Post by dmbgo »

What I have done so far, with no movement of the servo, is to connect the factory DB15 connector (as in the above photo) to the Acorn.

This involved the following connections:

CPn+ to ST1 on Acorn board
DIRn+ to DR1 on Acorn board
CPn- and DIRn- to Com (0v) on Acorn board
24v from PSU to H4 24IN on Acorn board
0v to COM on power supply
ALMn to IN5 on Acorn board (Commoned up all axis alarm signals)
Servo reset signals for X Y and Z, are on the first 3 relays of the Acorn 8 relay board

I've obviously done something wrong, or left something out? One thing is that there seems to be nothing connected to the ENx connection on the Acorn. I'm assuming this is an output?
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