Gathering ideas for a new CNC router-mill thingy

[JAZZCNC]

If we bring in the plates that are fixed to the rear side which connect the X axis carriages to the gantry rails, it works out very nicely i think - the plates are directly connected to the z axis carriage positions.

Plates are dimensioned as 15mm. bottom two are the gantry lower/upper sides and top one holds the z motor

Dave Think you have been got by Classic Gotcha.?
How are you going to access the holes for fastening the rear plate to the bottom bearing plate.? The Z bearings fasten from back side so can't fit when rear plate is fastened. You'll need to Lift the bearings so can access the bolts.

[Davek0974]

Dave Think you have been got by Classic Gotcha.?
How are you going to access the holes for fastening the rear plate to the bottom bearing plate.? The Z bearings fasten from back side so can't fit when rear plate is fastened. You'll need to Lift the bearings so can access the bolts.

....Scurries off to grab the drawings............

[Davek0974]

Ok, it definitely seems to work for me



Assembly would be to screw the x axis support plates on at the bottom and middle positions, then there is just enough clearance to pass the screws from the back to the front to mount the Z axis carriages, bottom line is tight but room should be ok.

[Davek0974]

Build log started here...

http://www.mycncuk.com/threads/9577-...7182#post77182

[Davek0974]

Ballscrews

Never used these before, the motion stuff arrived today :)

Questions...

Is it normal for the BK/BF end support bearings to be a press-fit? (Don't want to go forcing and break something.)

Do the nuts have to remain fitted or can they be removed without losing all the balls??

[JAZZCNC]

Questions...

Is it normal for the BK/BF end support bearings to be a press-fit? (Don't want to go forcing and break something.)

Do you mean they are Stiff to get on screws.? Or the bearings are pressed into the BK block.? If just stiff to get on screws then yes this can happen, just give the screw light rub with emery and they'll go on.

Do the nuts have to remain fitted or can they be removed without losing all the balls??

DONT REMOVE the balls WILL fall out. If you want to remove the Nut then you need tube the same size as the minor diameter of the screw and then rotate the nut onto it.

[Davek0974]

ok thanks, will leave nuts on screws.

I was surprised how big/heavy the spindle is :)