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having a hard time figuring out where the best place is to have the y axis motor. this is how i have it at the moment but im sure there is better solutions. didnt want the motor to be on the outside as that would mean the ballscrew would have to be longer.
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That will be fine. You could also turn the motor 180' so that you don't have to cut into the gantry plate.Quote:
Originally Posted by reefy86
Edit: Have you got the pulley ratio the wrong way round ie are you trying to speed the screw up?
Here's one way to do it.
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The only problem with turning the motor 180 is having to have the ballscrew longer like Dean's in the photo where the ballscrew is the whole length of the gantry. I mean it might be fine if you guys can confirm it will be OK but from gantry plate to gantry plate it measures 1780mm and with that length it's asking for the use of rotating ballnut right?
The length of my ball screw was by machine design and had nothing to do with the motor, the motor mount bracket will slide along the profile to meet any length of ball screw.Quote:
Originally Posted by reefy86
Like Clive mentioned below why are you showing a large pulley on the motor, you want this the other way around.
I already did that last night Dean :) what thickness do you use for the mounting brackets? Currently using 15mm
Yep, that will work nicely. Even 10mm works.Quote:
Originally Posted by reefy86
side note on the plates for the BK bearings, if you look at my pic you'll see the plates actually lift the ball-screw just above the profile, this is so the ball-nut housing will attach directly to the X-axis bearing plate rather than using a drop-down bracket.!
do you have a pic showing the ballnut housing position Dean? here is what mine looks like but it has a plate hanging from the bearing plate for the ballnut housing.Quote:
Originally Posted by JAZZCNC
also how do you guys solve issues like the ballnut housing being 1.25mm away from the plate its supposed to bolt on to? i have gone of the measurements from bst automation and i would of thought the ballnut housing along with both bk and bf ends would all be level with each other unless something has not aligned right in cad? picture is below to show what i mean.
thanks
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You could put a shim 1.5mm in the gap or machine the BK and BF mounting plate 1.5 thinner.
Thanks Clive probably easier with shims then.Quote:
Originally Posted by Clive S