Retrofit 2.0 TREE J325

All things related to the Centroid Acorn CNC Controller

Moderator: cnckeith

lavrgs
Posts: 79
Joined: Sat Aug 11, 2018 11:22 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
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: none
Location: Oregon

Re: Retrofit 2.0 TREE J325

Post by lavrgs »

Since the motors are not a drop in replacement for the Baldor motors I am working on a mounting plate. I also need to determine if the pulley will align with the one on the ballscrews. Attached is a concept.
Attachments
mtr-plate.pdf
(177.45 KiB) Downloaded 27 times
lavrgs
Posts: 79
Joined: Sat Aug 11, 2018 11:22 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
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: none
Location: Oregon

Re: Retrofit 2.0 TREE J325

Post by lavrgs »

Finding pulleys for the new DMM motors is becoming a problem I found the 12 Tooth (12L075) but the 15L075 for the Y axis has been difficult. Both axes have a 1:2 ratio, which is convenient, but would a 16/30 combo work? I think I have enough adjustment for the tensioning belt and adding an extra tooth to the motor should provide some extra grunt. The turns ratio will take care of correcting the motion.
tblough
Posts: 1536
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
Location: Boston, MA
Contact:

Re: Retrofit 2.0 TREE J325

Post by tblough »

Any ratio around 1:2 will work fine. I personaly prefer ratios that are prime numbers. With integral ratios, the same tooth on the belt, hits the same tooth on the sprockets every 1,2,3...N revolutions. This can cause harmonics and repeatable position errors. Using a prime ratio results in any individual belt tooth always contacting a different pulley tooth on every revolution.

For instance on my lathe Z, I have a 44:22 ratio (1.2222222) and on X I have 38:26 ratio.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
lavrgs
Posts: 79
Joined: Sat Aug 11, 2018 11:22 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
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: none
Location: Oregon

Re: Retrofit 2.0 TREE J325

Post by lavrgs »

lavrgs wrote: Sun May 16, 2021 5:12 pm I believe what I have is now wired correctly and only has one software (?) Issue.
I wrote a program to spin the motors and wanted to test the E-Stop. It stopped everything , however when I release the E-Stop it it starts everything. Do I need to set up something to induce a fault, or is this normal?
Ok I have it now...I have a toggle switch jumpered (second E-Stop) into the Acorn E-Stop Signal/COM ports and when I activate that it stops the program or faults as I had expected - Now I just need to wire it to the second set of contacts of the mushroom button.

My bench testing continues..will next try to get the spindle FWD Relay working. I did a quick look and expect to connect to Relay 4 and trigger a Relay for FWD. My initial test had some distractions going on so when I got a fault, I set things back to the way they were. I don't have the spindle connected my intent is just to get the relay working. I will include a REV relay at some time even though I've never run the spindle in reverse. Can rigid tapping be done with just a once around trigger or is an encoder required?
tblough
Posts: 1536
Joined: Tue Mar 22, 2016 10:03 am
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: Yes
MPU11 & GPIO4D -w/ 3rd Party Drives: Yes
DC3IOB: No
CNC12: Yes
CNC11: No
CPU10 or CPU7: No
CNC Control System Serial Number: 100505
100327
102696
103432
7804732B977B-0624192192
Location: Boston, MA
Contact:

Re: Retrofit 2.0 TREE J325

Post by tblough »

Differential (RS422) quadrature encoder with 1000 lines is recommended. You csnnot use a trigger wheel.
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
lavrgs
Posts: 79
Joined: Sat Aug 11, 2018 11:22 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
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: none
Location: Oregon

Re: Retrofit 2.0 TREE J325

Post by lavrgs »

I have had to design some motor mounts for the DMM motors and they will be going out for fab...

in the meantime I would like to bench test one of the motors as a spindle so I can hook up relays for FWD/REV etc. I haven't found much info on doing this but for a start I'd guess I need to communicate to the drive and get it out of servo mode...? Does Centroid have a schematic showing relays used for spindle motor control?
martyscncgarage
Posts: 8456
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
Oak CNC controller: No
MPU11 & GPIO4D -w/ 3rd Party Drives: No
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
CNC Control System Serial Number: none
Location: Mesa, AZ

Re: Retrofit 2.0 TREE J325

Post by martyscncgarage »

lavrgs wrote: Wed May 19, 2021 10:17 am I have had to design some motor mounts for the DMM motors and they will be going out for fab...

in the meantime I would like to bench test one of the motors as a spindle so I can hook up relays for FWD/REV etc. I haven't found much info on doing this but for a start I'd guess I need to communicate to the drive and get it out of servo mode...? Does Centroid have a schematic showing relays used for spindle motor control?
Did you order the "spindle" servo from DMM that way? Get their info sheet with it?

Did you know DMM sells some NEMA framed motors?
I assume you had all these discussions with DMM prior to purchase?

Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
lavrgs
Posts: 79
Joined: Sat Aug 11, 2018 11:22 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
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: none
Location: Oregon

Re: Retrofit 2.0 TREE J325

Post by lavrgs »

It was a bit of a surprise that I had to make mounts...I had convinced myself they were a drop in fit, obviously I missed something. Perhaps its the 1.0 or 1.3 kW motors that would drop in...
slodat
Posts: 654
Joined: Thu Apr 12, 2018 11:16 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
CNC Control System Serial Number: none

Re: Retrofit 2.0 TREE J325

Post by slodat »

The 1.3kW motors are NEMA 42, which bolted directly to my mill.
lavrgs
Posts: 79
Joined: Sat Aug 11, 2018 11:22 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
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: none
Location: Oregon

Re: Retrofit 2.0 TREE J325

Post by lavrgs »

martyscncgarage wrote: Wed May 19, 2021 10:21 am

Did you order the "spindle" servo from DMM that way? Get their info sheet with it?

Marty
I did not order a "spindle" servo I just wanted to set up the controls and was hoping to use one of the axis motors
Post Reply