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  1. #21
    I opened the bracket the same like you showed me, but i still have 8mm left. I checked motors dimensions and pulleys dimensions all seems ok. Where that difference could come from? Maybe you are using different pulley?
    Click image for larger version. 

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  2. #22
    Quote Originally Posted by valdis034 View Post
    I opened the bracket the same like you showed me, but i still have 8mm left. I checked motors dimensions and pulleys dimensions all seems ok. Where that difference could come from? Maybe you are using different pulley?
    Click image for larger version. 

Name:	20.jpg 
Views:	80 
Size:	121.0 KB 
ID:	18921
    The shaft on a nema 23 from Cnc4you is about 22.5mm long.
    ..Clive

  3. #23
    The one in my drawing is 20.6 mm and it is exactly the same like in any drawing you could find on internet with nema 23 dimdnsions. Double standard?

    Isiųsta naudojantis SM-G900F Tapatalk 4 Lt

  4. #24
    Quote Originally Posted by valdis034 View Post
    The one in my drawing is 20.6 mm and it is exactly the same like in any drawing you could find on internet with nema 23 dimdnsions. Double standard?

    Išsiųsta naudojantis SM-G900F Tapatalk 4 Lt
    Is your measurement just to the end of the key in the shaft?

    http://cnc4you.co.uk/resources/Stepp...1B%203.1Nm.pdf
    Last edited by Clive S; 21-07-2016 at 11:10 PM.
    ..Clive

  5. #25
    My motor shafts don't go all the way through the pulley and have been running fine for years.

    If it is more than half way into the pulley and the grub screws have a good lock onto the shaft I don't see any major problems.
    Building a CNC machine to make a better one since 2010 . . .
    MK1 (1st photo), MK2, MK3, MK4

  6. #26
    Just looked at my Z axis and it looks a little like this.....



    Shaft is 3/4 the way in the pulley and held on with 2 off M3 grub screws @ 90 to each other...



    Plate thickness is 3mm so 17mm pocket machined out the plate.
    Last edited by njhussey; 22-07-2016 at 12:23 PM.
    Neil...

    Build log...here

  7. #27
    So do we actually need that thickness of a plate if anyway we are machining almost all the through the thickness?

    Isiųsta naudojantis SM-G900F Tapatalk 4 Lt

  8. #28
    It has to have some inherent stiffness to stop any bending forces from the belt, I had it 20mm thick as it came out the same sheet as the rest and I needed the thickness to put the M8 bolts into....
    Neil...

    Build log...here

  9. #29
    So in my case i have it 10mm and attaching it to the other plate with M6 screws. Is that allright?

    Isiųsta naudojantis SM-G900F Tapatalk 4 Lt

  10. #30
    Is there any chance that somehow i have blocked my posts, so others cant see it? The same with massages? Or people just doesnt respond as much as i would like? :D

    Isiųsta naudojantis SM-G900F Tapatalk 4 Lt

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