Hey guys, this is my first project with Acorn, and my 2nd CNC build. First build was a basic openbuilds workbee with duet controller and lead screws, a far simpler undertaking than project 2.
The machine was modelled in fusion 360, constructed out of 40 series aluminum extrusion sourced from 80/20, with 20mm "hiwin" linear rails and 20mm ballscrews sourced from Fred @ BST automation (alibaba seller). 2010 screw on Z axis, 2020 on X and Y. model SDSK 3421p ELS nema 34 servos
Started the Mechanical build last week when our extrusion order showed up. The Frame went together fairly easily, though counts were a bit short on 16mm M8 bolts.
The aluminum plates for this project are being cut by a local friend on his mill. we had some difficulty finding someone to cut our parts, so the first few plates (y end plates) were painstakingly cut on the workbee, at the expense of much wd40 and a few bits. pics show the z axis body, still waiting on X plates, the X carriage interface plate, and the Z plate from our friend
While waiting on the remaining aluminum parts to be cut and ready for pickup, I started to assemble the control box
This is my first control box build. I'm certainly making some mistakes here. I chose 3 wire, NPN NC proximity switches (4mm sensing distance, flush, 12mm diameter, 65mm length from automation direct) for my home/limit switches. I reffered to these 2 diagrams when laying out my box
the plan is to install 4 xlr jacks on my control box for proximity switches, (currently shipping), 1 xlr jack for VFD 0-10v signal, and the clearpath logic and power will feed out of bulkhead fittings (1 per servo).
I'll keep this updated as I make progress, especially if I release any magic smoke. I will definitely be dropping in here for Control box questions before I make any moves towards powering the box up. Thanks for reading!
5x5 CNC - SDSK Build thread
Moderator: cnckeith
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Re: 5x5 CNC - SDSK Build thread
Nice build, thanks for showing.
Hope the first magic smoke comes from high speed cutting, not from the cabinet
Instead of extra jacks, I would use a cable management system like this one:
https://www.centroidcnc.com/centroid_di ... relief.pdf
Uwe
Hope the first magic smoke comes from high speed cutting, not from the cabinet
Instead of extra jacks, I would use a cable management system like this one:
https://www.centroidcnc.com/centroid_di ... relief.pdf
Uwe
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Re: 5x5 CNC - SDSK Build thread
Hmm interesting. I still have to order my logic and power cables from teknik.
I guess i should also add that im planning a seperate vfd box. Ran out of room in this one. Just using a chinese 2.2kw watercooled spindle with huanyang vfd. I supposse i will put a contactor in that box and q seperate 24v powersupply to kill the spindle on estop. I dont have a contactor for the servo power, because to my understanding i can trigger an estop condition on drives with relay one into the c86a board.
Ive been wondering, do i need a brake on Z? My previous machine with steppers didnt have one, but with the servos im worried the z will drop on power off or estop condition currently
I guess i should also add that im planning a seperate vfd box. Ran out of room in this one. Just using a chinese 2.2kw watercooled spindle with huanyang vfd. I supposse i will put a contactor in that box and q seperate 24v powersupply to kill the spindle on estop. I dont have a contactor for the servo power, because to my understanding i can trigger an estop condition on drives with relay one into the c86a board.
Ive been wondering, do i need a brake on Z? My previous machine with steppers didnt have one, but with the servos im worried the z will drop on power off or estop condition currently
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Re: 5x5 CNC - SDSK Build thread
With 2010 Z will drop down without power, so you need a brake or mount gassprings to keep the head up.
Extra cabinet with contactor and 24V power is a good idea, keeps the noise away from the Acorn
I make my own cable management, is quite easy to build. Less wiring work and less jacks which could leak noise or produce other kind of failures.
Uwe
Extra cabinet with contactor and 24V power is a good idea, keeps the noise away from the Acorn
I make my own cable management, is quite easy to build. Less wiring work and less jacks which could leak noise or produce other kind of failures.
Uwe
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Re: 5x5 CNC - SDSK Build thread
Any recomendations on a brake for this project?
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Re: 5x5 CNC - SDSK Build thread
Thats definitely an ideal price range, but how do you mount that one compared to say the one on the teknik site which seens straightforward
https://teknic.com/products/spring-appl ... -34-brake/
https://teknic.com/products/spring-appl ... -34-brake/
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Re: 5x5 CNC - SDSK Build thread
The teknik one is simple bolt on, with the brake only you can mount it on the other end of the ballscrew, or you can build a housing like teknik to fit it between the servo and ballscrew.
Easy way is a gasspring with a litte less force than the weight of the moving parts.
Uwe
Easy way is a gasspring with a litte less force than the weight of the moving parts.
Uwe
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Re: 5x5 CNC - SDSK Build thread
Bit more progress hope to mount dragchain and motors next week and start wiring it up.
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Re: 5x5 CNC - SDSK Build thread
Comically tall z axis assembly was put together today