. .

Thread: One BF20L more

  1. #1
    Hi,

    I start building the Optimum BF20L based on Robocnc plans.

    Electronics that will used are from CNCDRIVE, 250W servo motors on X-Y, 400W on Z, 1.2KW power supply and UCCNC S/W.
    Direct drive and i will try to open oil pockets.

    Click image for larger version. 

Name:	IMG_2004.jpg 
Views:	299 
Size:	391.8 KB 
ID:	25663
    Click image for larger version. 

Name:	IMG_2005.jpg 
Views:	290 
Size:	281.4 KB 
ID:	25664

  2. #2
    Very interesting, looking forward to hearing more! One question springs to mind, how come the Z axis requires so much more power than X or Y?

  3. #3
    i am not an expert on the subject. My thought is that because of the z axi's weight, extra power may required. Also the ballscrew is M20 instead of M16 used on the X-Y axis

  4. #4
    Quote Originally Posted by antomost View Post
    i am not an expert on the subject. My thought is that because of the z axi's weight, extra power may required. Also the ballscrew is M20 instead of M16 used on the X-Y axis

    Ah! Were those sizes of motors recommended by another build then? There is a motor size calculator floating around these forums somewhere, although I don't know if it also calculates for servos - you might find it interesting.

    My line of thought was that the Z axis is typically held in place moving less frequently with lower accelerations, whilst the X and Y have to deal with the cutting forces - hence why I asked the original question. I can certainly see your logic - and the inertia of the larger screw will make a reasonable difference.

  5. #5
    Hello all, looks likes anniversary reply but I just had the time to continue the build. Y and X almost finished.. waiting for an enclosure (bottom bath) to be prepared by a local factory and the moving forward with the Z. Finally, I will use the same (250w) motor also for Z, direct but with a brake.

  6. #6
    Having just this second recovered my little SX2.7 running steppers and 2:1 on a 1605 screw, all I can say is: Wow!, Speedy!

    Looking good.

  7. #7
    a very carefully homing!!Click image for larger version. 

Name:	IMG_0301.jpg 
Views:	163 
Size:	333.6 KB 
ID:	27898
    Click image for larger version. 

Name:	IMG_0300.jpg 
Views:	176 
Size:	359.8 KB 
ID:	27899

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. CONVERSION: Optimum BF20L Conversion
    By Rikk in forum Conversion Build Logs
    Replies: 0
    Last Post: 17-07-2011, 06:00 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •