Acorn CNC Conversion of Precision Matthews PM-727

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MecTechMike
Posts: 54
Joined: Thu Aug 10, 2017 8:59 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC11: No
CPU10 or CPU7: No

Acorn CNC Conversion of Precision Matthews PM-727

Post by MecTechMike »

Hey Folks,

I wanted to post my results in converting my Precision Matthews PM-727 manual mill to a CNC machine using the Acorn board. I built a simple electronics cabinet to house the Acorn board and power supplies. The schematics hook-up published by Centroid for the Teknic drives went without a hitch. I used Misumi low profile 15mm ball screws which allowed me to squeeze the ball nut inside the tables with clearance.

After backlash calibration, I measure less than a thousanth of error over 300mm of travel when using the DRO that came with the mill). Very Nice.
PM-727 CNC Conversion
PM-727 CNC Conversion
CNC Specs:
Drives: Teknic Servo Drive (SKHP Type)
Power Supply: Dual Teknic IPC-5
Ball Screws: Misumi C5 BSS1505 Low Profile (5mm Lead)
Fixed Mounts: Misumi C5
PC: HP All-in-One (Core i3) Touch Screen

Photos and Videos Posted here:
https://goo.gl/photos/EddCrajE9wguNNAy7

Feel free to PM me if you have a similar mill and want to convert it.

Enjoy,
Mike
762x51
Posts: 119
Joined: Wed Aug 02, 2017 8:40 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: B0D5CC56DD75-0605170063 , 985DAD4295CF-0928170127 , 38D2694E4703-1222170401
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
Location: Near Guilford College, Greensboro, NC
Contact:

Re: Acorn CNC Conversion of Precision Matthews PM-727

Post by 762x51 »

Just looked at the photos of your conversion and you really did a nice job. :!:
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: Yes
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CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
CNC11: Yes
CPU10 or CPU7: Yes
Location: Mesa, AZ

Re: Acorn CNC Conversion of Precision Matthews PM-727

Post by martyscncgarage »

762x51 wrote: Fri Aug 11, 2017 11:03 am Just looked at the photos of your conversion and you really did a nice job. :!:

I second that! Nice work!
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
MecTechMike
Posts: 54
Joined: Thu Aug 10, 2017 8:59 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC11: No
CPU10 or CPU7: No

Re: Acorn CNC Conversion of Precision Matthews PM-727

Post by MecTechMike »

Thanks for the compliments gentlemen.
Reedfirst
Posts: 168
Joined: Wed Aug 09, 2017 1:02 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
Oak CNC controller: No
CNC Control System Serial Number: none
DC3IOB: No
CNC11: No
CPU10 or CPU7: No
Location: Boynton Beach, Florida

Re: Acorn CNC Conversion of Precision Matthews PM-727

Post by Reedfirst »

That looks like a very fun and capable little machine! You did a fantastic job on that conversion.
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