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  1. #11
    Quote Originally Posted by routercnc View Post
    I think what silyavski is saying is that the centre hole on a nema 23 needs to be about 40mm dia to clear the 38mm raised boss on the end of the motor. If you cut long slots for the motor mounting then as these are about 47mm apart and about 6mm across then they get very close/ too close to the centre hole. On a servo motor this overlap sound like it is worse (don't own servos myself)
    If you need a long adjustment slot (more than +- 10mm) a workaround could be to lightly pocket the 40mm centre clearance instead of a complete cut out ? Away from computer so can't check this for sure. Is there another way?

    Exactly thats what i meant. Thanks!

    There must be many ways to do a thing but here is how i think:

    -more or less center to center around 90mm, so that usually the belt is in the region of 270 to 315mm depending on the ratio.

    -Dont have the time now to play and prove it but at that distance/look at the Nema 23 mount/ was possible to lower the small pulley teeth count and rise the other , so as i remember 1:1 to 1:2 was possible may be even more, without changing anything. I just remember that when doing the yellow machine there was that consideration also.
    Same with the servo machine now i am building but not to such extend, due to shorter play possibility.

    Below you will see a picture with the maximum movement according to me and having in mind the parts were laser cut from steel. So maybe from aluminum could be more play.

    Nothing to prove with all that , just sharing for your consideration and if possible to help avoiding errors. Thanks


    PS. The measures are radiuses, possible play and size of the thinnest part there

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    Last edited by Boyan Silyavski; 09-04-2015 at 10:38 PM.
    project 1 , 2, Dust Shoe ...

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