Analog 0-10 volt staying at .6 volts when should be zero for spindle

All things related to the Centroid Acorn CNC Controller

Moderator: cnckeith

eng199
Posts: 31
Joined: Fri Jan 10, 2014 11:29 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: Yes
CNC11: Yes
CPU10 or CPU7: Yes
System Serial Number: none

Re: Analog 0-10 volt staying at .6 volts when should be zero

Post by eng199 » Mon Feb 05, 2018 4:20 pm

Did you try this?
diycncscott wrote:
Mon Feb 05, 2018 11:48 am
Disconnect the wires from the Acorn to the DMM. I'm sure you will find it is 0VDC with them disconnected.

diycncscott
Posts: 665
Joined: Thu Mar 04, 2010 4:03 pm

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by diycncscott » Mon Feb 05, 2018 5:10 pm

Double checked. Tested and confirmed here. Please post a report

spindle Nerd
Posts: 39
Joined: Fri Jan 19, 2018 8:21 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: Yes
CPU10 or CPU7: No
System Serial Number: none

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by spindle Nerd » Mon Feb 05, 2018 5:29 pm

It only does it when you have the DMM Dyn 4 Servo drive hooked up to the pins,and the motor runs on it's own without any commands at all.
And if you measure the pins while it runs, the voltage is at .6 to .7 volts on the analog output pin's of Acorn .

If i remove the servo it goes to zero ,that is the problem we are having it needs to stay at zero , with the servo hooked up or you have a motor going with out command.

Dmm is supposed to start a exchange program for those drives that are used for spindle's, and send out new ones with parameter changes to alleviate the issues.
They should announce soon on this program i hope

frijoli
Posts: 395
Joined: Tue Sep 12, 2017 10:03 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
System Serial Number: none yet
Location: Outside Winston-Salem, NC

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by frijoli » Mon Feb 05, 2018 5:44 pm

spindle Nerd wrote:
Mon Feb 05, 2018 5:29 pm
It only does it when you have the DMM Dyn 4 Servo drive hooked up to the pins,and the motor runs on it's own without any commands at all.
Can you verify this is in manual and automatic? I am not at home this week so I cannot re-test. When I was testing mine, and the Acorn booted in manual mode there was voltage on the analog output even when nothing was connected.

Clay
Clay
Outside Winston-Salem, NC

spindle Nerd
Posts: 39
Joined: Fri Jan 19, 2018 8:21 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: Yes
CPU10 or CPU7: No
System Serial Number: none

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by spindle Nerd » Tue Feb 06, 2018 12:46 pm

Can you verify this is in manual and automatic? I am not at home this week so I cannot re-test. When I was testing mine, and the Acorn booted in manual mode there was voltage on the analog output even when nothing was connected.

Clay
Ok i re-tested, remove DYN4 drive from analog out put Acorn.

Acorn voltage when in automatic (S0) =.185 volts at commanded Spindle( 0 ) speed, commanded max spindle speed=volts 10.4

Manual mode when first switched to manual .623 volts then use minus button to reduce to final voltage of = .235 (lowest it would go) ,high 10.2 volt's max volts.

I am not sure what is going on, but these are the results tested four time's, same readings using new fluke meter , my other meter wants to come on in mili - volts can be a pain if you do not catch it .

Can someone please , test there analog out voltage at automatic and manual with out any thing hooked to the pins and also report what version of the board and software they are using ,mine is( version 3 )I believe removable pin headers and cnc 12.

I believe diycncscott tested and got his to change but i could not get mine to do so with the file he provided .

diycncscott
Posts: 665
Joined: Thu Mar 04, 2010 4:03 pm

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by diycncscott » Tue Feb 06, 2018 2:11 pm

Please post a current report

spindle Nerd
Posts: 39
Joined: Fri Jan 19, 2018 8:21 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: Yes
CPU10 or CPU7: No
System Serial Number: none

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by spindle Nerd » Tue Feb 06, 2018 5:18 pm

[quote by diycncscott » Tue Feb 06, 2018 11:11 am

Please post a current report ][/quote]

Here it is , let me know what you find please , and i want thank you for helping, maybe this thing can be more than a big expensive paper weight .
Attachments
report_38D2693E2A03-0110180494_2018-02-06_13-11-16.zip
(177.96 KiB) Downloaded 2 times

diycncscott
Posts: 665
Joined: Thu Mar 04, 2010 4:03 pm

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by diycncscott » Tue Feb 06, 2018 5:31 pm

It does look as though you have the updated PLC.

Press alt-i to bring up the real-time I/O screen. The second line down are the outputs with OUT1 starting at the far left.

OUT17-OUT28 are the digital to analog(DAC) outputs used for the 0-10VDC. They should ALL be off (Red) when the spindle is not on. In your case that means SpinFwd (Out3) and SpinRev(Out5) are both off.(Red).

Auto or manual spindle mode should no longer be a factor.

spindle Nerd
Posts: 39
Joined: Fri Jan 19, 2018 8:21 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC11: Yes
CPU10 or CPU7: No
System Serial Number: none

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by spindle Nerd » Tue Feb 06, 2018 5:52 pm

It does look as though you have the updated PLC.

Press alt-i to bring up the real-time I/O screen. The second line down are the outputs with OUT1 starting at the far left.

OUT17-OUT28 are the digital to analog(DAC) outputs used for the 0-10VDC. They should ALL be off (Red) when the spindle is not on. In your case that means SpinFwd (Out3) and SpinRev(Out5) are both off.(Red).

Auto or manual spindle mode should no longer be a factor.
Yes they are red.voltage out at this very time .185vdc there was only on output green and it was #1.

diycncscott
Posts: 665
Joined: Thu Mar 04, 2010 4:03 pm

Re: Analog 0-10 volt staying at .6 volts when should be zero - RESOLVED

Post by diycncscott » Tue Feb 06, 2018 6:16 pm

Ok. The Acorn is not commanding any voltage. It sounds as the the voltage level is floating due to the Dyn4 connection. With it disconnected is it 0?(or very nearly - testing here we were at 15mv)

Are you using shielded, twisted pair wiring? What gauge? How long is the run? Is it run along side any other wiring?

Post Reply

Who is online

Users browsing this forum: cbb1962, Holycross and 2 guests