Oh yeah.. just checked that and I’m getting 94v there. Problem is that pc I’m using is run from 19V psu through simple jack. How am I suppose to ground the computer? All the psu and acorn is plugged into same socket
Acorn burned down < strand of hookup wire on board>.
Moderator: cnckeith
-
- Posts: 118
- Joined: Sun Jan 17, 2021 3:13 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
Re: Acorn burned down
-
- Posts: 728
- Joined: Mon Feb 19, 2018 2:52 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: 38D269594F9C-0110180512
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
- Location: UK
- Contact:
Re: Acorn burned down < strand of hookup wire on board>.
You'd hope for the 19V PSU to be floating WRT ground. 94V sounds rather a lot, so you'd want to be concerned about what's causing it, not least if it can frazzle your Acorn. If it has enough oomf to can damage the Acorn, it could be hazardous to you.
You should have good hard protective earth connections to the chasses of both the PC and your machine. Then the logical thing would be for both systems to be grounded on the 0V rail.
You should have good hard protective earth connections to the chasses of both the PC and your machine. Then the logical thing would be for both systems to be grounded on the 0V rail.
-
- Posts: 118
- Joined: Sun Jan 17, 2021 3:13 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
Re: Acorn burned down < strand of hookup wire on board>.
Yeah I just realised that.. i’m investigating it now.. it looks like there is something wrong with spindle drive. Still working on itMuzzer wrote: ↑Mon May 03, 2021 10:23 am You'd hope for the 19V PSU to be floating WRT ground. 94V sounds rather a lot, so you'd want to be concerned about what's causing it, not least if it can frazzle your Acorn. If it has enough oomf to can damage the Acorn, it could be hazardous to you.
You should have good hard protective earth connections to the chasses of both the PC and your machine. Then the logical thing would be for both systems to be grounded on the 0V rail.
-
- Posts: 118
- Joined: Sun Jan 17, 2021 3:13 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
Re: Acorn burned down < strand of hookup wire on board>.
Ok... so I get stuck here... I get 0v between ground and ethernet casing with everything connected apart from analog output from acorn to the dc drive. Once the analog output is connected I get 90V between ethernet casing and ground... I’ve checked all grounding and it looks ok. What else should i check?
-
- Posts: 118
- Joined: Sun Jan 17, 2021 3:13 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
Re: Acorn burned down < strand of hookup wire on board>.
I’m gonna buy a new beaglebone which burned and new signal conditioner to get isolation on analog inputs.
https://uk.rs-online.com/web/p/signal-c ... g/8842458/
Can anyone please provide me with some links and video how to quickly flash and synchronise the beaglebone with acorn? I want to get ready for it so I’m up and running by next weekend again...
https://uk.rs-online.com/web/p/signal-c ... g/8842458/
Can anyone please provide me with some links and video how to quickly flash and synchronise the beaglebone with acorn? I want to get ready for it so I’m up and running by next weekend again...
-
- Posts: 9914
- Joined: Tue Mar 28, 2017 12:01 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Location: Mesa, AZ
Re: Acorn burned down < strand of hookup wire on board>.
Look at KB Electronics KBSI240D signal isolator.
Flashing firmware instructions:
Flashing firmware instructions:
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
We can't "SEE" what you see...
Mesa, AZ
-
- Posts: 118
- Joined: Sun Jan 17, 2021 3:13 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
Re: Acorn burned down < strand of hookup wire on board>.
Unfortunately not available in UK. Do u know any other option?
-
- Posts: 9914
- Joined: Tue Mar 28, 2017 12:01 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: Yes
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: Yes
- CPU10 or CPU7: Yes
- Location: Mesa, AZ
Re: Acorn burned down < strand of hookup wire on board>.
No, not in UKLenelyWolf wrote: ↑Mon May 03, 2021 1:08 pmUnfortunately not available in UK. Do u know any other option?
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
We can't "SEE" what you see...
Mesa, AZ
-
- Posts: 118
- Joined: Sun Jan 17, 2021 3:13 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
Re: Acorn burned down < strand of hookup wire on board>.
So do u think the one I posted will be good enough? It is expensive like hell so I hope it willmartyscncgarage wrote: ↑Mon May 03, 2021 1:11 pmNo, not in UKLenelyWolf wrote: ↑Mon May 03, 2021 1:08 pmUnfortunately not available in UK. Do u know any other option?
-
- Posts: 118
- Joined: Sun Jan 17, 2021 3:13 pm
- Acorn CNC Controller: Yes
- Allin1DC CNC Controller: No
- Oak CNC controller: No
- CNC Control System Serial Number: none
- DC3IOB: No
- CNC12: Yes
- CNC11: No
- CPU10 or CPU7: No
Re: Acorn burned down < strand of hookup wire on board>.
Or can anyone suggest replacement for the lenze speed controller which would be compatible with acorn and drive this motor?
https://inverterdrive.com/group/Servo-M ... sthom-GEC/
https://inverterdrive.com/group/Servo-M ... sthom-GEC/