New Build: Emco PC5 CNC Lathe

All things related to the Centroid Acorn CNC Controller

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martyscncgarage
Posts: 9912
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Location: Mesa, AZ

Re: New Build: Emco PC5 CNC Lathe

Post by martyscncgarage »

Part 6, Basic bench test of a Leadshine Closed Loop stepper drive and motor.
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martyscncgarage
Posts: 9912
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Location: Mesa, AZ

Re: New Build: Emco PC5 CNC Lathe

Post by martyscncgarage »

Part 7, Cabinet is wired and complete. Overview of the work and using CNC4PC.com's C86Acorn and C34 boards.
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GBCues
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Re: New Build: Emco PC5 CNC Lathe

Post by GBCues »

Hi Marty,
Another great video, thanks!
A couple of questions:
I too use an E-Stop contactor, but I have run my Line through the contact, not Neutral/Common. I'm wondering what the difference is.
I keep hearing about using "snubbers" but have never seen such a device advertised (at least by that name). They are to prevent arcing and fusing of the coil contacts in this case. Is that right?
And if you've covered these topics elsewhere, just point me in that direction.
Thanks again,
Gary
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
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Location: Mesa, AZ

Re: New Build: Emco PC5 CNC Lathe

Post by martyscncgarage »

GBCues wrote: Thu Nov 12, 2020 12:31 pm Hi Marty,
Another great video, thanks!
A couple of questions:
I too use an E-Stop contactor, but I have run my Line through the contact, not Neutral/Common. I'm wondering what the difference is.
I keep hearing about using "snubbers" but have never seen such a device advertised (at least by that name). They are to prevent arcing and fusing of the coil contacts in this case. Is that right?
And if you've covered these topics elsewhere, just point me in that direction.
Thanks again,
Gary
Gary
Search Quencharc on Centroid's page (its toward the bottom)
https://www.centroidcnc.com/centroid_di ... nents.html
There is a description and tech bulletin of their use.


Running the axis motor load across two contacts spreads the load across two contacts instead of one.
Also, when it comes to DC, the contactors are rated differently. 24VDC is hardly worth worrying about but 48VDC and up to 180VDC you must use correctly rated contactors.

Hope this helps a little bit...
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
GBCues
Posts: 111
Joined: Tue Aug 14, 2018 10:49 am
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Location: Denver, CO

Re: New Build: Emco PC5 CNC Lathe

Post by GBCues »

Helpful as always
Thanks!
Gary
martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
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Re: New Build: Emco PC5 CNC Lathe

Post by martyscncgarage »

This was an impromptu video. Kind of an overview of setting up the X and Z axis overall turns ratio and lash comp on the small Emco PC5 lathe

Marty

Emco PC5 Centroid CNC Acorn Conversion: Part 8 Setting Z & X Overall Turns Ratio and Lash Comp

Reminder, for support please follow this post: viewtopic.php?f=20&t=383
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martyscncgarage
Posts: 9912
Joined: Tue Mar 28, 2017 12:01 pm
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CNC Control System Serial Number: none
DC3IOB: No
CNC12: Yes
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Location: Mesa, AZ

Re: New Build: Emco PC5 CNC Lathe

Post by martyscncgarage »

Part 8: Going over the Wizard settings for the PC5 and a brief overview of other features.
This is an unedited video. Be nice :P

I try to go over the Wizard settings for the Emco PC5, using the CNC4PC C86Acorn board and Leadshine CS-D508 closed loop steppers, a 1000 line encoder, and a VFD. I touch on some of the other Wizard settings.

Using these settings would give those setting up a PC5 a starting point. Keep in mind your overall turns ratio may change depending on the pulley tooth count you use on the motor to ball screw (overall turns ratio)

I have also attached my report created after doing this video. Conceivably, you could RESTORE it to your machine if you are doing the exact same build, and only have to import your license, and tweak your Overall Turns Ratio and Lash settings, possibly soft limit travels slightly.

Attachments
report_0035FF8A1655-0827203666_2020-11-21_06-58-14.zip
(589.98 KiB) Downloaded 142 times
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AcornFanBoy
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Re: New Build: Emco PC5 CNC Lathe

Post by AcornFanBoy »

Hi Marty,

I started converting an Emco Compact 5 CNC for Centroid Acorn four years ago, but due to changes in life the project stalled. I had already purchased ClearPath CPM-SDSK-2311S-EQN servos for the axis, and a KBPB-225 DC speed controller to provide variable speed for the Baumüller Nürnberg GNF 56 D motor that came with the lathe.

I really appreciate the effort you have put in this article to document the "recipe" you have used for these Emco conversions. With your current knowledge, is there something you would change in the components used? In a video you mentioned that NC hall-effect would be better, but the recipe lists NO model. If there are any such tips what to do and / or purchase, I'd be more than happy to hear about them.

Do you think I can use my current DC motor, or would it be better to replace it with AC + VFD combo?

I'm rally happy you have specific recommendations for the timing belt and pulley. When I tried to mount the ClearPath using the existing pulley, something didn't align properly, and I hope that gets fixed by another pulley.

Best,
Antti
martyscncgarage
Posts: 9912
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: New Build: Emco PC5 CNC Lathe

Post by martyscncgarage »

AcornFanBoy wrote: Wed Feb 02, 2022 7:09 am Hi Marty,

I started converting an Emco Compact 5 CNC for Centroid Acorn four years ago, but due to changes in life the project stalled. I had already purchased ClearPath CPM-SDSK-2311S-EQN servos for the axis, and a KBPB-225 DC speed controller to provide variable speed for the Baumüller Nürnberg GNF 56 D motor that came with the lathe.

I really appreciate the effort you have put in this article to document the "recipe" you have used for these Emco conversions. With your current knowledge, is there something you would change in the components used? In a video you mentioned that NC hall-effect would be better, but the recipe lists NO model. If there are any such tips what to do and / or purchase, I'd be more than happy to hear about them.

Do you think I can use my current DC motor, or would it be better to replace it with AC + VFD combo?

I'm rally happy you have specific recommendations for the timing belt and pulley. When I tried to mount the ClearPath using the existing pulley, something didn't align properly, and I hope that gets fixed by another pulley.

Best,
Antti
I converted several of these small lathes. They all turned out well and are in constant use.
You can use your DC motor. You will have to fiddle with the settings on the KB Electronics Drive. Buy yourself a digital tachometer from Amazon, less than $20 so you can calibrate your spindle speed.
Clearpath motors should work great. Consider using CNC4PC.com's C86ACCP to simplify their installation with Acorn.
Marty
Reminder, for support please follow this post: viewtopic.php?f=20&t=383
We can't "SEE" what you see...
Mesa, AZ
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