Simple Machine (help and advice needed)

[Gregor]

Hi
Could someone please explain how you measure ballscrews and what fixing you need to order in order to fix the ballscrew.The ballscrew in the picture is the x axis off the machine and there is an end plate at each end welded to the frame . there is an outer and an inner measurement.
Cheers.

[EddyCurrent]

This is the 'standard machining', if you are going to use pulleys then ask for 'dimension F' to be increased to 30mm, that's what I asked Chai to do and he did it no problem and accurately.

http://www.mycncuk.com/threads/4826-...2863#post32863

BK and BF bearings are the usual choice, dimensions here; http://www.alibaba.com/product-detai...961879637.html

Using that info you should draw it up in CAD to find the exact size you need.

[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.