Simple Machine (help and advice needed)

[Gregor]

Thanks EddyCurrent

[Gregor]

Hi All
I have spent most off the day thinking about this build and also been reading the build logs and I have had a go at a machine using timing belt and pulleys which would give me nearly the same working area as the first machine but the outer dimensions would be reduced.I have used 60mmx60mm box and underneath I have used 6mm plate. Because I am using 60mm box how would I fit the stepper motor as the shaft would not be long enough to go through the box and would I just get the ballscrew end machined to the acquired length to go through the box .Here's some pics the base might not be strong enough. All Advice most welcome.
Cheers

[JAZZCNC]

That design can't work.! How you going to connect to gantry.?

[Gregor]

Hi Jazz
It was went to fit like this but looking at it it looks stupid .

[JAZZCNC]

Hi Jazz
It was went to fit like this but looking at it it looks stupid .

Bad idea for few reasons really. The bed isn't supported at the edges and the L brackets are too flimsy.
It will work if you Support the edges and run a piece across to each gantry side under the supports with thicker drop plates.

[EddyCurrent]

What about for the bearings you bolt a piece of say 20mm aluminium plate on using 4 cap head hex screws (I've shown bolts) in counterbored holes, then you slide the carriage along to each end of the rail in turn, so you can fasten the plate onto the gantry using 2 bolts (or maybe 4) inserted from below. Or if you put the 2 bolts in first there's probably enough room to tighten them above the rail.

[dazza]

oops edit I just looked at the previous pages and see you covered it. I would definitely stick with the screws on the outside compared to the last drawing.