Upgrading 1984 Wells Index 820 with Allin1DC

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Chevy427z
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Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by Chevy427z »

Haven't had a lot of time to spend on the machine but making some progress.

The E-Stop is wired. I wound up keeping the 24VAC driven contactor and ordered a transformer that Marty called out to power it, but found one cheaper on ebay.

Working on wiring the servo motor power cables. And getting confused at 5.6, steps 1 and 2. Is it safe to assume that in step 1, I am checking resistance between the motor chassis and the terminals at the AllinOne (vs at the motor itself)? I've replayed Marty's video "Back panel no 4" over and over and not finding my answer.

Step 2 actually calls out checking at the ALLinOne, hence my confusion.

We've already tested the motors themselves in previous steps, so I'm thinking that this is correct, but I want to be sure.

Thank you.

Mark

edited for clarity
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servo motor power connections testing.png
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cncsnw
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Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by cncsnw »

You are primarily checking for any unwanted continuity between the motor armature circuit and the motor case (chassis ground).

It does not matter much whether you measure it at the motor terminals inside the back cap, or at the motor power cable ends where they will attach to the Allin1DC. The latter method (measuring it through the motor power cable) might also tell you if your motor power cable was shorted to chassis ground somewhere (e.g. pinched or cut).
Chevy427z
Posts: 112
Joined: Mon Apr 12, 2021 9:39 am
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DC3IOB: No
CNC12: Yes
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CNC Control System Serial Number: A900999
Location: Clinton, NC, USA
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Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by Chevy427z »

cncsnw wrote: Tue Aug 17, 2021 6:10 pm You are primarily checking for any unwanted continuity between the motor armature circuit and the motor case (chassis ground).

It does not matter much whether you measure it at the motor terminals inside the back cap, or at the motor power cable ends where they will attach to the Allin1DC. The latter method (measuring it through the motor power cable) might also tell you if your motor power cable was shorted to chassis ground somewhere (e.g. pinched or cut).
Got it! Thank you! All checks well.

Onward and upward.

Mark
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Chevy427z
Posts: 112
Joined: Mon Apr 12, 2021 9:39 am
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CNC Control System Serial Number: A900999
Location: Clinton, NC, USA
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Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by Chevy427z »

Working on my limit switches.

I had to change them all from normally open to normally closed.

My question is about homing vs limit switch. My Y and Z axes have three switches. I am assuming two are limit and one is homing. Safe to assume that the AllInOne doesn't use homing switches? I haven't read anything or seen in any videos on the matter.

And which switches are which? Clearly, in the Z axis, one allows the quill to travel quite a bit further up than the other. Do I have a choice as to which to use? What would you choose?

Y is a little different. Three switches, but completely unsure as to which does what.

edited: The arrows in the Z axis pic indicate where the switch button is.

Mark
Attachments
Z Axis Limit Switches.jpg
Y Axis Limit Switches.jpg
Y Axis Buttons.jpg
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Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by cncsnw »

The Centroid system does not need separate home switches. There is no need to wire them at all.

Assuming the machine is actually capable of reaching its old limit switches in every direction, you can just use those as both limit and home switches.

The old limit switches would be the outermost ones. The old home switches would be the ones that trip a short distance prior to the limit.
Chevy427z
Posts: 112
Joined: Mon Apr 12, 2021 9:39 am
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Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by Chevy427z »

cncsnw wrote: Fri Aug 20, 2021 12:05 am The Centroid system does not need separate home switches. There is no need to wire them at all.

Assuming the machine is actually capable of reaching its old limit switches in every direction, you can just use those as both limit and home switches.

The old limit switches would be the outermost ones. The old home switches would be the ones that trip a short distance prior to the limit.
Perfect. Thank you!
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SYSTEM ID - 0008DC111213-0301212560
Chevy427z
Posts: 112
Joined: Mon Apr 12, 2021 9:39 am
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CNC Control System Serial Number: A900999
Location: Clinton, NC, USA
Contact:

Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by Chevy427z »

Limit switches swapped over from NO to NC, connected to the AllInOne, and working fine.

Working on my lube pump. It's an electromechanical system (Trabon Mod 120-003-521) that I am thinking about wiring directly as all electrical, as mentioned in the install manual (5.8 page 46) I am including a sketch of my existing system just for reference. It has a solenoid with a timer that I've never truly been happy with. The base is broken, but that doesn't affect the operation and is whole 'nother story.

The manual says that the low lube switch must be normally closed. Mine is normally open (when full of oil). Do I need to wire in a contactor or is there another way around this?

I've also enclosed a pic of some devices I am hoping someone can identify. They are wired across 110VAC to the lube pump and a couple of other things I haven't figured out yet. Are they snubbers? As far as I can tell, they are original (~1984)

Mark
Attachments
20210822_133745.jpg
20210822_132640.jpg
20210821_160307.jpg
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SYSTEM ID - 0008DC111213-0301212560
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Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by cncsnw »

You can invert the low-lube input (usually INP9) in software.

Press Alt-i to bring up the PLC Diagnostic display. Arrow right eight times to highlight INP9 "LubeOk". Press Ctrl-Alt-i to invert the input. That will make a closed circuit appear open, and an open circuit appear closed.

Yes, the blue RK blocks are arc suppressors (snubbers).
Chevy427z
Posts: 112
Joined: Mon Apr 12, 2021 9:39 am
Acorn CNC Controller: No
Allin1DC CNC Controller: Yes
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: A900999
Location: Clinton, NC, USA
Contact:

Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by Chevy427z »

cncsnw wrote: Sun Aug 22, 2021 3:31 pm You can invert the low-lube input (usually INP9) in software.

Press Alt-i to bring up the PLC Diagnostic display. Arrow right eight times to highlight INP9 "LubeOk". Press Ctrl-Alt-i to invert the input. That will make a closed circuit appear open, and an open circuit appear closed.

Yes, the blue RK blocks are arc suppressors (snubbers).
Thank you! I had meant to ask about inverting the diagnostic display.
M400
A900999
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SYSTEM ID - 0008DC111213-0301212560
Chevy427z
Posts: 112
Joined: Mon Apr 12, 2021 9:39 am
Acorn CNC Controller: No
Allin1DC CNC Controller: Yes
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: A900999
Location: Clinton, NC, USA
Contact:

Re: Upgrading 1984 Wells Index 820 with Allin1DC

Post by Chevy427z »

Greetings.

Been a while but I had some time to spend on the machine.

Working on the motor software setup. Page 53, around step 4.

It says to have stall detection enabled. With stall detection enabled, my E-stop will not energize my contactors. Up to this point, my E-stop will energize my contactors (with stall detection disabled). However this is where I encounter a problem. Not sure if it's stall detection related or not.

Referring to the pics, you can see that my encoders are not tied directly to my motors, but they are by belt. For safety, the belts are removed. All three axes will "run away" the moment I release the E-stop and will stop upon hitting the E-stop. I'm getting the feeling that I will have to connect the belts for the encoders to feed back properly, with my thumb on the E-stop, ready to kill it. Does that sound right?

Additionally, the manual says to be sure that the registers count up while rotating the motor shafts counter clock wise. In order for my table to physically move in an X positive (theoretical head moving right, table moves left) I have to physically turn my motor in a clockwise direction. Same goes for Z. Y is the only one that moves properly when turning CCW. Is this strictly a Centroid motor issue, or do I really need to go in and change the direction of the motors in PID? I hope I explained this well enough, it's really confusing.

Mark

edited: forgot to upload a report. and fixed spelling errors lol Not going to repeat what I fixed, but I misspelled "clockwise".
Attachments
report_0008DC111213-0301212560_2021-09-04_14-10-02.zip
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20210904_134014.jpg
20210904_134006.jpg
M400
A900999
CNC12
SYSTEM ID - 0008DC111213-0301212560
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