Build Thread Building PicSteps - Trying to find missing specs for the BOB

Results 1 to 5 of 5

Thread: Building PicSteps - Trying to find missing specs for the BOB

  1. #1
    Registered
    Join Date
    Nov 2009
    Location
    Belgium
    Posts
    4
    Downloads
    0
    Uploads
    0

    Question Building PicSteps - Trying to find missing specs for the BOB

    Hi all,

    I've started building my PicSteps, including the Break-out Board and the input daughter board. Some pics attached for people wo like pictures


    Just one question: for those who have already built the BOB, what values are the TBA resistors ?

    regards,
    Raf

    Similar Threads:
    Attached Thumbnails Attached Thumbnails Building PicSteps - Trying to find missing specs for the BOB-imgp2707b-jpg   Building PicSteps - Trying to find missing specs for the BOB-imgp2709b-jpg   Building PicSteps - Trying to find missing specs for the BOB-imgp2712b-jpg   Building PicSteps - Trying to find missing specs for the BOB-imgp2726b-jpg  

    Building PicSteps - Trying to find missing specs for the BOB-imgp2731b-jpg  


  2. #2
    Registered 10bulls's Avatar
    Join Date
    Feb 2005
    Location
    UK
    Posts
    521
    Downloads
    0
    Uploads
    0

    Default

    Hi Raf,

    I think I used 470R.

    There is a bit more info and trouble shooting around this post...

    http://www.cnczone.com/forums/showth...-bob#post76429

    ...jeez where'd those last 4 years go ?!?!

    Good luck!

    www.cambam.co.uk


  3. #3
    Registered
    Join Date
    Nov 2009
    Location
    Belgium
    Posts
    4
    Downloads
    0
    Uploads
    0

    Smile Progress...

    10bulls,

    Thanks for the link to that thread, it really got me up to speed!

    Some photos with the progress i've made building the
    controllers and picsteps =)

    Does anyone know the value for C1 on the input board ? 1uF ?

    Raf

    Attached Thumbnails Attached Thumbnails Building PicSteps - Trying to find missing specs for the BOB-imgp2769b-jpg   Building PicSteps - Trying to find missing specs for the BOB-imgp2770b-jpg  


  4. #4
    Registered
    Join Date
    Nov 2009
    Location
    Belgium
    Posts
    4
    Downloads
    0
    Uploads
    0

    Default Almost there!

    Much much later I almost have a working setup.

    After fiddling with the acceleration values in Mach3 and setting the stepping mode jumper to full step i managed to blow an LMD, and yes, that was with a proper heatsink attached (not shown in the photos), and the voltage set to 38V.

    I got it replaced and it's working again

    The only problem i have now is when I quickly switch directions while jogging,
    then it doesn't always change direction.. The indicator LEDs however clearly show the DIR signal changing and all my picsteps behave the same.

    Does anyone have an idea why it does this ?

    I'm using the 20Mhz firmware without current reduction.

    Perhaps changing the opto resistors (now at 420R) to a lower value will yield a direction pulse that is a little longer ?


    Some pics attached.

    Attached Thumbnails Attached Thumbnails Building PicSteps - Trying to find missing specs for the BOB-imgp2807-jpg   Building PicSteps - Trying to find missing specs for the BOB-imgp2803-jpg   Building PicSteps - Trying to find missing specs for the BOB-imgp2801-jpg  


  5. #5
    Registered
    Join Date
    Jan 2009
    Location
    USA
    Posts
    57
    Downloads
    0
    Uploads
    0

    Default Pulse width

    Quote Originally Posted by scrat View Post
    Much much later I almost have a working setup.

    After fiddling with the acceleration values in Mach3 and setting the stepping mode jumper to full step i managed to blow an LMD, and yes, that was with a proper heatsink attached (not shown in the photos), and the voltage set to 38V.

    I got it replaced and it's working again

    The only problem i have now is when I quickly switch directions while jogging,
    then it doesn't always change direction.. The indicator LEDs however clearly show the DIR signal changing and all my picsteps behave the same.

    Does anyone have an idea why it does this ?

    I'm using the 20Mhz firmware without current reduction.

    Perhaps changing the opto resistors (now at 420R) to a lower value will yield a direction pulse that is a little longer ?


    Some pics attached.
    Mach3 allows you to set the pulse widths in the configuration. Give that a try first. P.S. Uncluttered work area envy.




Tags for this Thread

Posting Permissions

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


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

Building PicSteps - Trying to find missing specs for the BOB

Building PicSteps - Trying to find missing specs for the BOB

Building PicSteps - Trying to find missing specs for the BOB