My Cnc build

[JAZZCNC]

Whats the small gear under the large gear doing.?

[Skiprat]

The small gear is just the center of the large gear. The gears were ripped out of a motor rotor type box which fortunately i have 3 of. The small one if removed leaves a bore of approx 12mm in the big gear so instead of machining a shaft, i just left the little gear in which has the same bore of 8mm, which is the same as the shaft, other gears in picture and the bearings i bought. Now i know it works, i can find or buy some aluminium plate and cut some permanent fixtures.

Basically the small gear is doing nothing but being the right size bore for the big gear but cost nothing since i already had them.

Might buy some other gears as one unit because the way ive designed it, i can move the plate to accommodate different size gears.

Cheers Skiprat

[kingcreaky]

Basically the small gear is doing nothing but being the right size bore for the big gear but cost nothing since i already had them.t

like your style.

[Skiprat]

The following photos might explain better if my explanation was'nt clear.

[Skiprat]

well here is an update very well over due.
Built all the gearboxes and they worked great but i ended up with a square sided circle.
Research recommended doing some stiffening of the axis, which i did but to no avail.
I then got hold of an industrial gearbox for the stepper but it was so low geared it was not right....i.e the stepper was turning as it highest rated speed and the moment was so slow it wasn't good.
So off to drawing board and loads more research and i acquired some aluminium plate and ordered a full set of T5 16mm pulleys and belts to make a new solid style gear reducer of approx 3.2:1.
The difference was unbelievable to the stiffness of the axis. I still get a square circle but haven't completed the other 2 reducers, so at the moment i have a T5 pulley system on the x axis but geared reducers on the y axis o i think this needs eliminating first.
I have a Closed loop stepper system so wonder if this has implications with the software side.

It seems as though the x axis is stopping before reversing but the y axis is still moving , hence the straight bit.

Any thought appreciated.

Cheers Skiprat.

Pictures to follow in no particular order...(Too lazy to organise.)

[Skiprat]

[Skiprat]

Aluminium parts in the process..

[Skiprat]

The horrible stupid looking circle that wont go away...YET..The square seems ok but circle always has flat spot easily seen in photo to the right....BUGGER