First stop ‘The Z-axis”…

We bought a Optimum BF20 L as a conventional machine that needs to be converted to CNC.
There are a lot of options of driving the lead screws of all these axis.
Some say ‘Take of the hand-wheels  and place some motors on them” (not our approach).

First we need to disassemble the Z-axis by completely taking the thing apart.
TIP: Making pictures of each step can help you later on.

disassemble_Z (1) disassemble_Z (2) disassemble_Z (3)
disassemble_Z (4) disassemble_Z (5) disassemble_Z (6)

Now its time to start measuring and drawing everything in a CAD program.
Making machines or converting them starts out with drawings..

On the left we see an overview of what the Z-axis will become.
The blue parts in the middle are the parts we have to make for this axis.
All parts that are not blue can be purchased.

CAD_01 CAD_02 CAD_03

Looking at the right picture above I have used:
One Nema 34 4.0Nm Stepper motor: DCNC-IP54-4.0NM
One  Zero Backlash Shaft Coupler DCNC-D32-L32 
Two  Nema 34 Stepper Mounts Nema34Mount
One 3202/5202-2RS 15x35x15.9 (Double row angular contact bearing)
One  Inductive Switch Shielded 12NOC2A-S NPN 
And a hand full of bolts… 😉

So thats the easy part… buying stuff…

The stepper motor drives the leadscrew through the zero backlash coupler.
I have chosen not to use the original one, but a RM2005 (found on Ebay : Linearmotionbearings2008)
This guy (Chai) can also machine the ends for you.

So Order the following :

RM2005
PDF Drawing : RM2005

Now its time for some actual machining.
Lets call the top part (Isolated in the left bottom image) the Bearinghouse.

CAD_04 Bearinghouse
Drawings :  Z-axis

The linear movement from the ballnut is transferred to the carriage through a bracket.
For now I’ll call this the ballnut bracket and can be found beneath.

 CAD_05 Ballnut Bracket
Drawings : Z-axis2

Milling and powder coating  the parts :

 Assembly of the Optimum BF20L Z-axis :

68 Comments

  1. Rod J Says Reply

    very nice!

  2. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Rod Java !

  3. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Rod Java !

  4. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Rod Java !

  5. Leonardo Benedetti Says Reply

    veramente un bel lavoro, complimenti!!!

  6. RoboCNC Frees- & Graveerwerk Says Reply

    Grazie mille Leonardo

  7. RoboCNC Frees- & Graveerwerk Says Reply

    Grazie mille Leonardo

  8. RoboCNC Frees- & Graveerwerk Says Reply

    Grazie mille Leonardo

  9. noxnflame Says Reply

    Very Nice! What are your feeds and speeds on the aluminum? Also what kind of bit? Thanks!

  10. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks noxnflames, My feeds and speeds are not something to write down, as this machine is way from perfect for machining aluminum. But here i have worked with 17krpm, 1000 or 1200mm/min, at 0,5mm depth. Bit is a 30* up-cut carbide 8mm 2 flute if i recall correctly.

  11. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks noxnflames, My feeds and speeds are not something to write down, as this machine is way from perfect for machining aluminum. But here i have worked with 17krpm, 1000 or 1200mm/min, at 0,5mm depth. Bit is a 30* up-cut carbide 8mm 2 flute if i recall correctly.

  12. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks noxnflames, My feeds and speeds are not something to write down, as this machine is way from perfect for machining aluminum. But here i have worked with 17krpm, 1000 or 1200mm/min, at 0,5mm depth. Bit is a 30* up-cut carbide 8mm 2 flute if i recall correctly.

  13. squidskunk Says Reply

    what is the part for..?

  14. RoboCNC Frees- & Graveerwerk Says Reply

    It will be on top of the Z-axis of the Optimum BF20L. It holds the bearing, and is used to couple the leadscrew with the stepper. This will be shown in one of the next videos..

  15. RoboCNC Frees- & Graveerwerk Says Reply

    It will be on top of the Z-axis of the Optimum BF20L. It holds the bearing, and is used to couple the leadscrew with the stepper. This will be shown in one of the next videos..

  16. RoboCNC Frees- & Graveerwerk Says Reply

    It will be on top of the Z-axis of the Optimum BF20L. It holds the bearing, and is used to couple the leadscrew with the stepper. This will be shown in one of the next videos..

  17. CNCnutz (Peter Passuello) Says Reply

    Great video. The powder coat process was interesting.

  18. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks m8 :)…

  19. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks m8 :)…

  20. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks m8 :)…

  21. Dex DNV Says Reply

    This is very interresting! and seems to be quite easy for someone like me…! Where did you find the powder? Txs, and good job as usual! 😉

  22. RoboCNC Frees- & Graveerwerk Says Reply

    Hi Dex… This is easy indeed, and fast and extremely durable. This power came from powderbuythepound. Thank Dex !

  23. RoboCNC Frees- & Graveerwerk Says Reply

    Hi Dex… This is easy indeed, and fast and extremely durable. This power came from powderbuythepound. Thank Dex !

  24. RoboCNC Frees- & Graveerwerk Says Reply

    Hi Dex… This is easy indeed, and fast and extremely durable. This power came from powderbuythepound. Thank Dex !

  25. 2112devin2112 Says Reply

    Hey, love your videos! What software are you using to generate the tool paths? I’m having a hard time finding any decent free or inexpensive CAM software. Thanks

  26. RoboCNC Frees- & Graveerwerk Says Reply

    Hi Devin, this is one of the first questions that i can not answer im afraid.’ I do not recommend software… and don’t know any free or inexpensive CAM package to check out..

  27. RoboCNC Frees- & Graveerwerk Says Reply

    Hi Devin, this is one of the first questions that i can not answer im afraid.’ I do not recommend software… and don’t know any free or inexpensive CAM package to check out..

  28. RoboCNC Frees- & Graveerwerk Says Reply

    Hi Devin, this is one of the first questions that i can not answer im afraid.’ I do not recommend software… and don’t know any free or inexpensive CAM package to check out..

  29. Jacques Productions Says Reply

    Man that looks real good!! i didnt know u could do this stuff aswell.. awesome! Jacques

  30. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Jacques… Ya we are full of secrets :) Thanks for the nice comment my friend..

  31. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Jacques… Ya we are full of secrets :) Thanks for the nice comment my friend..

  32. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Jacques… Ya we are full of secrets :) Thanks for the nice comment my friend..

  33. h4z4rd42 Says Reply

    Just great vid again. Could you tell me, where to buy this kind of coating gun and powder? Thanks.

  34. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks m8… This powercoat system came from ‘coating4all’ (local company.) But Ebay, and ‘powderbuythepound’ would have similar sets i think.

  35. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks m8… This powercoat system came from ‘coating4all’ (local company.) But Ebay, and ‘powderbuythepound’ would have similar sets i think.

  36. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks m8… This powercoat system came from ‘coating4all’ (local company.) But Ebay, and ‘powderbuythepound’ would have similar sets i think.

  37. NuttyforNissan Says Reply

    Looks good :)

  38. Jacques Productions Says Reply

    looking snug! Robo :)

  39. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks mate… ! It’s first movement.. (somehow always starting at the Z)

  40. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks mate… ! It’s first movement.. (somehow always starting at the Z)

  41. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks mate… ! It’s first movement.. (somehow always starting at the Z)

  42. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Jacques… !

  43. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Jacques… !

  44. RoboCNC Frees- & Graveerwerk Says Reply

    Thanks Jacques… !

  45. ?????? ???????? Says Reply

    ?????!!!

  46. ?????? ???????? Says Reply

    ? ???????.

  47. RoboCNC Frees- & Graveerwerk Says Reply

    ???????!

  48. RoboCNC Frees- & Graveerwerk Says Reply

    ???????!

  49. RoboCNC Frees- & Graveerwerk Says Reply

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  50. stian Says Reply

    Looking good, do you have a update?

  51. RoboCNC Frees- & Graveerwerk Says Reply

    busy busy busy… I have to find some time to post more info and video’s.. But check FaceBook, to see where we are at…. Thanks !

  52. RoboCNC Frees- & Graveerwerk Says Reply

    busy busy busy… I have to find some time to post more info and video’s.. But check FaceBook, to see where we are at…. Thanks !

  53. RoboCNC Frees- & Graveerwerk Says Reply

    busy busy busy… I have to find some time to post more info and video’s.. But check FaceBook, to see where we are at…. Thanks !

  54. Jose Lobo Jr Says Reply

    Frist of all….your job is incredible ….congratulations

    Secondly …I really loved your painting

    I am a fan of you….so ….thumbs up for you

    be good

    Lobo

  55. Ernst P Says Reply

    Mooi gedaan en bedankt voor je duidelijke uitleg !

  56. oxtoolco Says Reply

    Very nice. Paint came out great.Cheers,Tom

  57. Mr P Says Reply

    Wat leuk zeg, overigens dat die vonk kwam is vaak een teken van slechte verbinding van het materiaal aan de draad die je er boven hebt hangen even kort gezegd.Heb dit een jaar gedaan in een spuiterij maar er is weinig aan moet ik zeggen toch erg leuk dat je dit thuis doet ;)Alleen hoor je hem niet eerst op te warmen en te spuiten, al kan het wel maar is er meer kans op zakkers/druppels en dikke randen.En geduld heb je inderdaad 😉

  58. Jack Says Reply

    hello – if possible receiving Bearinghouse in dxf format – greetings Jack.

  59. Bjorn Biermann Says Reply

    Heel netjes gedaan.

  60. giovanni Says Reply

    hello, good job. but a lot of measures are missing. could you please send me or add DXF files of Z-Axis like others?
    many thank’s, and very good job.

    giovanni

    • Robo Says Reply

      Please state which part or file you are referring to.
      In the Z-axis are two rar downloads, did you download these?

      • giovanni Says Reply

        hi , thank you for your fst reply!
        yes, i download both.
        i mean the aluminium plate of Z axis. for nut house all ok, already done.
        there is missing distance between border of ball bearing and others.
        if you provide a dxf of this plate i can take it myself.

        Giovanni

    • Robo Says Reply

      Think I found it.. New file is linked to the Z-axis bearing house, including DXF now.

  61. Luca Says Reply

    Very nice! But I think you forgot to write the position of the Z axis bearinghouse center.

    • Marcel Says Reply

      Hi Luca,

      You are absolutely right… (Although you can also download the .rar package and check the dxf)
      But here are the measurements for the bearing placement:
      It is centered in the X direction (so 60mm from the left or right side).
      In the Y direction it measures 45,55mm from the back, and 50,45mm from the front.

      The 4 threaded holes to mount the stepper spacers are centered around the bearing.

      Hope this helps..
      Best Regards, Marcel

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