Acorn / Leadshine "9031 DRIVE FAULT"

[martyscncgarage]

You did see this video right?
https://youtu.be/pVwFXbmSLJQ

Start with the basics, check to see if you have motor lock with ONLY motor power as I showed previously
Then connect +5VDC to PULSE+ and DIR+, then Pulse - to ST1 on Acorn and DIR- on Acorn DIR1 Try and turn the motor.
DO NOT CONNECT ALM OR ENA at this time

[Richard70]

Followed your procedure:
- Power to motors only (Input and encoder plugs pulled, Acorn output disconnected)
motors draw hold current for the first time!
- Connected motor encoder - no hold current
went through manuals again, the only item that out of spec' ; +5VDC was 5.65V
wired a 2amp rectifier in series with the +5V (to drop voltage by predictable amount)
Reconnected motor encoders - all three motors now draw hold current. Who knew!~

- Connected DIR & PUL inputs - motors still drawing holding current.
- Tried running motors with program and MDI - screen display shows motors turning, but motors only sitting still, drawing hold current.

Maybe I need to change some Wizard settings? Report attached:

report_985DADEB7306-0103180445_2018-03-02_09-48-49.zip

(177.98 KiB) Downloaded 125 times

Thanks so much for getting me this far!

Added note: Acorn board will not power up if connected to drives that have +5V logic power and +72V motor power connected. Removing plugs H2 & H3 (PUL & DIR connections to drives), then repowering Acorn board - boots up o.k.

[martyscncgarage]

Followed your procedure:
- Power to motors only (Input and encoder plugs pulled, Acorn output disconnected)
motors draw hold current for the first time!
- Connected motor encoder - no hold current
went through manuals again, the only item that out of spec' ; +5VDC was 5.65V
wired a 2amp rectifier in series with the +5V (to drop voltage by predictable amount)
Reconnected motor encoders - all three motors now draw hold current. Who knew!~

- Connected DIR & PUL inputs - motors still drawing holding current.
- Tried running motors with program and MDI - screen display shows motors turning, but motors only sitting still, drawing hold current.

Maybe I need to change some Wizard settings? Report attached:
report_985DADEB7306-0103180445_2018-03-02_09-48-49.zip

Thanks so much for getting me this far!

Added note: Acorn board will not power up if connected to drives that have +5V logic power and +72V motor power connected. Removing plugs H2 & H3 (PUL & DIR connections to drives), then repowering Acorn board - boots up o.k.

The test was for you to
Connect your motor AND encoder to the drive. Power the drive with your 72V supply only.
Motor should hold WITH its encoder connected to it as mine did.
NO 5VDC connected. ONLY MOTOR POWER. (ANT NOT CONNECTED TO ACORN)
Shafts should lock and hold. If they don't something is not configured correctly. I don't know WHY those dipswitch settings are on that drive. If its closed loop, should be no dipswitches really to change.

You will need a power relay to power up your drive and motor power AFTER Acorn starts. You can use RL1 output to do this. Gary Campbell has demonstrated it. There is a sticky that discusses this issue with multiple power supplies as well. On the main Acorn page if you want to surgically make the update.

Again, +5vdc INTO the +Step/Dir pins of your drive. The -Step/Dir signals FROM your drive go to Acorn terminals
DO NOT CONNECT ALARM AND ENA at this time. Just worry about getting CNC12/Acorn to turn your motors.

I have asked Automation Technologies to send me a motor and drive to test. I can't understand why so many people are having trouble with them.
Whether or not they do loan me a set is another story. I would do a short video on them.

[Richard70]

I did previously do the connections as you instructed and results as follows:

Motor + encoder (alarm & enable not connected) with only 72V motor power connected, Acorn not connected - motors holding o.k.

Added +5.0VDC (corrected from +5.6VDC) to encoder and step/dir - motors, then powering up +72VDC and +5.0VDC together (no connection to Acorn) motors holding o.k.
Note that when +5V was +5.6V - motors did not draw holding current ????

Powered off, then connected step/direction from drives to Acorn
Powered up Acorn and CNC12 software, set machine zero, then powered up +72VDC together with +5.0VDC - motor holding o.k.

Went through above procedure again with the same positive results.
Following that:
Running test program or MDI still results in the on screen display scrolling through instructions, but the motors do not respond.

Dipswitches all at the factory settings - never changed: 1,3,4,5,6 ON - 2 OFF
(= 1600 steps/rev, clockwise direction, auto tuning)

Thanks for the heads up re powering the drivers/motors after Acorn is running, will do that. It's an easy circuit add on, would turn on +72V & +5V after E stop is cleared.

At present, for bench testing, I am just using a separate switch for the +72VDC & +5.0VDC, turning it on after Acorn is powered up and CNC12 is running to accomplish the same.

[martyscncgarage]

Good the motors are holding without being connected to Acorn

Try and go into the Wizard Advanced tab and invert the step and direction signals, write the changes and try again

Are you doing Simple home at this time in the Wizard? Please do for testing.
When you start CNC12, don't home it, just press on Cont button (take it off incremental)
And use the xyz buttons to see if you can spin the motors

[Richard70]

You can probably see me, all the way from AZ, grinning from ear to ear!

Jog worked perfectly, so I took a small leap and ran my test program - also worked perfectly!

Your help has been appreciated more than you could imagine!!

Can't wait to start putting it all together.

Now I need to decide on what to use for my lathe spindle so I can run at speed (hoping for at least 1500rpm) and being able to position at the same time. Right now looking at using the Delta ASDA-B2 servo set as I have been assured that I can program it to run 'free wheel' and also CNC position.

I am adding this machine to a 14" swing x 36" long bed wood lathe that will be able to run as a CNC using a router for spindle and also let me manually turn to finish off pieces without having to reload on a manual lathe.
My existing milling CNC with rotating 4th axis, is limited to 12" lengths and too slow - and work has to be reloaded on a manual lathe for finishing. Would be able to 'demote' it to making only flat work.

[Richard70]

Just one last item to close this post as "RESOLVED"

Many thanks to those who helped, especially Martyscncgarage who made it work!

Components used:
Centroid Acorn controller (171025)
KL-80882H drivers, KL34-8N-1000 motors
Automation Technologies dual output 72VDC power supply
+5VDC power supply I had collecting dust....

Proof; Video of the bench test working
https://www.youtube.com/watch?v=ICkE47Y ... e=youtu.be

[martyscncgarage]

Please explain for the benefit of other users what you ended up doing to get the things moving.

[Richard70]

Just to clarify - most of the work done to solve this problem was accomplished by:
martyscncgarage
Don't like to take credit for work done by someone else...

Steps taken for my 3 axis hybrid servo motor bench test:
I am using CNC12 Lathe software, so references reflect this choice.

Steps do not include those that did not work - only the sequence that was successful

1. Wire Acorn board for bench test, follow instructions on Centroid web site
2. Download Centroid Acorn CNC12 software
3. Follow video instructions from Centroid web site to set up Acorn board in bench test mode.
4. Successfully run Acorn board in 'Bench Test' mode
5. Set up CNC12 Wizard to "Leadshine" - this will mostly set up the Z and X axis, I added B (linear) and C (rotation) axis
6. In Wizard advanced axis setup screen; check step and direction boxes, uncheck enable boxes.
7. Exit CNC12, turn off power to Acorn.
8. Wire power supply and motor leads to driver connector, +72VDC power supply to driver VDC / GND. no other wiring yet.
9. Power up 72VDC, ensure that motors are holding. Turn off power to continue wiring.
10. Wire motor encoder leads to driver connector and wire +5VDC to driver VCC / GND.
NOTE: +5VDC power supply must have output less than 5.5VDC, my drivers would not work at 5.6VDC!
11. Power up 72VDC, +5VDC - motors should be holding.
12. Power off 72VDC, +5VDC.
13. Wire step and direction outputs from Acorn to driver step and direction inputs. Don't forget to wire +5VDC to the + inputs.
I used 'Acorn_rev3 connections to Leadshine DM series stepper driver' as a guide.
Ensure that home/limit switch and E stop inputs are wired correctly.
Note: 'DRIVE OK' input to Acorn must either be wired or the Wizard setting set to NO.
If set to NC and not wired, Acorn will assume a fault and not run.
14. Power up Acorn, when blue LED flashes once per second, run CNC12 software. No need to home or do any other function.
VERY IMPORTANT !! ACORN POWER MUST BE APPLIED BEFORE +5VDC IS TURNED ON.
If +5VDC is present when +24VDC to Acorn is turned on, Acorn board will not boot up.
15. Power up 72VDC, +5VDC simultaneously. Motors should be holding.
16. Using the jog control in interrupt mode, jog all axis connected. Motors should move.
17. Run a piece of test program to ensure all axis are operating. I needed to do this as the CNC12 lathe software only has Z and X on the jog screen.
I'm hoping that Centroid will add an option to add a linear and rotation axis to the jog screen (hint, hint).

My next step is to add the fourth (rotation) axis...

Components used for motor bench test:
Centroid Acorn controller rev3 (171025)
KL-80882H drivers, KL34-8N-1000 motors (Leadshine CS-D1008 drivers, ES-M23480-S motors)
72VDC power supply; 2 rectifier/filter outputs, 10Amps each
+5VDC power supply

[Nick4Maker]

Same issues with me (drive faults & 5VDC boot up), except I have DMM motors & DYN4 drives.
Thanks to all the contributors, I almost had it figured out, but unable to move motors with ENA wire connection (DYN4 PIN15 to Acorn H2,3 ENA), in Acorn CNC12. Without ENA connected, all motors move and test G-code shows motor movement.

Therefore, since the problems are the same (except diff. motors), should I post my set-up, trials and results here?
Or should I start a new thread?

Thanks to all,

Nick