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      CNC_2018-Apr-27_05-16-50PM.png

      Hello CNCers,

      I am new to the world of CNC, and I humbly presenting to you my Hobby CNC design. Yes, this is Another Chinese Linear Rail Concept. the base of the design is from the ROVERCNC.COM lt model, adjusted to my budget.

      First mistake, In the excitement of getting my own CNC I putted the cart before the horse and directed myself straight to alliexpress, ordering some linear rails, controllers, and motors. I end up with some weird ball screws and linear rails dimensions. anyway, i ended up putting things together and i would say that the design is 95% finished. Some parts are missing, I plan to 3d Print them in ABS.

      Fusion 360 file

      to date, i have in hand:

      from aliexpress
      x-y-z axis linear rails ( 20mm), made in china
      1605 ball screws assembly, made in china
      A weird 4 axis RNR bitsensor controller, made in china
      4x DM542, made in china
      4x High torque Nema 23 motors, made in china
      1x 36V 360W power supply, made in china

      From makerparts.ca
      all C beams, required uncut. Oben build
      all 20x40 required uncut.
      Limit Swiches
      screws and bolts
      Spindel Holder

      Other source
      aviation plugs,
      shielded cables, 4x wire and 2x wires, 18ga and 22ga.

      ordered:
      Gantry Plates 3/8" 6061-T6
      Z front and back Plates 3/8" 6061-T6
      Feets 1/4" 6061-T6
      Rail risers 3/8" 6061-T6

      to be ordered
      Hitachi, M12VC, I was looking for low speed ( aluminum/acrylic) and has to be Quiet ( 79.5db)
      milling bits, cable chain, dust shoe

      Any advice is welcome.

      update 07-05-2018

      Still waitning for the 3/8 plates to be machined the lead time was 3-4 weeks. by the time stuff are pilling and I worked on the electronic enlocsure wich will all be inside the PC case.

      Printing some drag chain component

      IMG_0145.JPG

      hardware is slowly arriving.

      IMG_0148.JPG

      working on the computer case with enclosed electronics

      IMG_0147.JPG

      Update 18-05-2018

      Today i received the machinated plates made from 3/8 6061 T651 precision plates, some paint will pimp this rig. Unfortunatly, some grass as stuck below the paint! I guess it will make a « greener » cnc.

      67D2C72E-9B8B-4B1C-982E-557E14154522.jpeg

      Tapping all extrusion is a long process! Thanks to makersparts.ca that did some of the work for free!

      Corona is more important than wd40 when tapping!!

      image.jpg

      Update 21-05-2018

      While this build is starting to look at something, i got a bad feeling this weekend, when I tried to move the carriers over the rails, the movement was not smooth at all. i was really bad, and carriers are getting stuck every here and there. each carrier have been tested individually and each rail. I can say that most carrier are working well on the small rails but are not working smooth at all on medium and long rails. ( X, Y). Thus, said, i would warn anyone from aliexpress china made rails. i sent video to suppliers to see if he can do something.

      by the mean time, some picture and the video of the carriers bad movements.
      IMG_0181.JPG IMG_0182.JPG IMG_0184.JPG

      Update 26-05-2018

      Z axis is done! Not the sexiest Z axis of all time but hopefully it will just work.
      The base frame is done.

      Now need to assemble everything together. with all the screws ordered, i shall be fine.

      IMG_0187.JPG IMG_0188.JPG IMG_0189.JPG IMG_0190.JPG IMG_0191.JPG IMG_0192.JPG


      Update 27-05-2018

      Most of the mechanical assembly is done, going forward with the electronics

      IMG_0193.JPG IMG_0194.JPG IMG_0195.JPG


      Update 03-06-2018

      Sad day in Quebec city, first, I was planning to do an all in one computer case and CNC control. it tooks me a lot of time to hook up everything and place everything but i managed to get it done.

      IMG_0198.JPG

      when i tried to fire up the the Chinese 36v power supply, it was dead. After dismantling, opening and investigation, i found out that the copper wire coil was broken. I then choose to re solder the coil to where it was soldered before.

      IMG_0202.JPG

      After re-assembling the power supply, it was working, but between 27v-28v. I dont know if this is normal, but 27v seems really far away from the rated 36v. I anyway decided to hook it up, trying to fire the stepper.

      But then what!!! My 15 years old WINDOWS XP computer that was working relatively fine 15 days ago, is now blue screening at windows logon. nothing to do this will blue screen every time. After a few tries, the computer dosent even turn on. WHAT THE &(*?&(! this whole thing is starting to stretch my patience.

      The show must go on, I said to myself, so i tried the whole thing with a laptop. fortunatly, i had in hand those adapter that short the Computer PSU 24 pin so it power up even if the motherboard is not responding.

      After setting the ports /inputs correctly on the laptop, we fortunately got some movements.



      This whole issue will cost me alot, I need to re plan everything in an external control box, i needed to order 1 new 36v PS and and new 24v PS. I will need to buy stuff to make an enclosure. it is at least a 2 month step back and few hundred canadian dollars.

      I should have bought Benchtop PRO 2424!


      Update 17-06-2018

      Not much done recently, following my recent issue with the all in one PC/CNC controller box, I have designed a new case only for the CNC control. it is actually ordered and waiting for arrival.
      By the time I have wired the limit/homing switch, and add some rail covers. the stl file for rail cover is on the resource page.

      component board v38.jpg IMG_0220.JPG IMG_0222.JPG IMG_0223.JPG

      Update 13-07-2018

      Hey Hey, long time no update... For those following the thread, you have seen that the machine did some work. however it was not without any issue. What was done since last update:

      Got the new control case to be punched and bent
      IMG_0229.JPG IMG_0232.JPG IMG_0233.JPG IMG_0236.JPG

      I also got knocked in the head overlooking at the router diameter vs the openbuilds router mount.

      IMG_0242.JPG IMG_0244.JPG

      So I had to print a new router mount. Not sure it will last long because my first attempt at printing ABS was a majestic failure. it wrapped so much that it was unusable. So I printed one in PLA. it is thick enough to endorse the load, but i fear the heat from the router on the long run.

      Since the beginning i didn't had any specific place to install the CNC. Working on the ground sucks! so I called Mom and she generously gave me a desk so I can install the CNC on it. The Drawers are very helpfull to store all the stuff.

      IMG_0247.JPG IMG_0250.JPG IMG_0252.JPG

      Then we were ready to play a little with the machine. We ended up breaking, as you know from the discussion board, 5 limit switches and one carbide O flute endmill. At the end we managed to get a nice cut and start prepping the spoil board.

      IMG_0254.JPG IMG_E0255.JPG IMG_0270.JPG IMG_0271.JPG

      A you can see at one location during the spoil board preparation, the machine did not moved up and a trace was made in the board. After checking the G-code, it was supposed to move up. Don't know what happened! I am also missing some inserts since the hardware store did not had enough. will have to amazon some...

      Machining the spoil board, i ended up finding that this stuff is making wait to much dirt to be used as it is. so i am actually designing and printing a dust shoe. my temporary setup will use a vaccum brush. but i also ordered those 1m-70mm brush from ebay for a future and permanent use.

      hitachi router mount with brush holder v15.png IMG_0265.JPG IMG_0266.JPG IMG_0267.JPG IMG_0268.JPG IMG_0272.JPG

      Stay tuned for a final update and review of the performance.

      Update 12-08-2018

      Well Folks, I guest its time to call this build complete! Since the last time, i manage to get a new location for the cnc. The Family room is not really appropriate for this machine. Also since I live in a twin house, I wanted a space far from the neighbor. I managed to install the CNC in the tiny mechanical room well closed and with a few walls in between the machine and the neighbor.

      Since last update we finished the temporary dust shoe. ( still waiting for the 1m-70mm brush from china to complete the permanent dust shoe.

      IMG_0273.JPG IMG_0275.JPG IMG_0279.JPG IMG_0281.JPG

      We also managed( not without many failure) to machine some cutting board, tag plates in 3003-H14 and some probing plate in 6061-T651.

      IMG_0297.JPG IMG_0300.JPG IMG_0302.JPG IMG_0301.JPG

      I am still learning the machining process ( from tool path creation to finishing the parts). What i have learned is that high quality cutting tools with known feed and speed and design for a particular work are the best. I have mainly used Onsrud and Amana. Must say I prefer the Onsrud however.

      Thanks for everyone that took the time to look at this build.

      HP

      Attached Files:

      Koby88, Zulugo, TAG7 and 7 others like this.
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  • Build Details

    Build License:
    • CC - Attribution - CC BY

    Reason for this Build

    for the fun of building it! Mill small aluminum and acrylic parts,

    Inspired by

    rovercnc.com LT model
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