Re: Using belt drive on large machine - preliminary pictures

Hi, on the dust problem, the mdf table top will extend to the edge of
the table. There will be no slot for shavings to get through. Yes, the
drive pulley has a 1.128" pitch diameter so that is 3.53" per rev. The
servos are about 1000rpm max and 900 oz-in. I will start with 10:1
reduction and go from there. Reduction is via smaller timing belts.
The table is driven on both sides. There is a driveshaft running
inside the gantry which connects the reduction units on each side.
Dean

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<davemucha@j...> wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "deanc500"
> <deancouillard@s...> wrote:
> > Hi, I have posted a quick page here
> > http://www.axxustech.com/Axxus4x8/axxus_4x8.htm
> > showing a design for a belt driven machine. I have used the belts
> as a
> > sort of "rack and pinion" alternative.
> > Dean
>
> Hi Dean,
>
> Nice work, and great photos.
>
> I really like the light weight router holding bracket(s) I made mine
> from 4" alum block and they weight almost as much as the router.
>
> I do have a couple of questions that may or may not fall into your
> experiance.
>
> one is of dust in a wood shop environment. seems the belt teeth are
> in a posistion to hold dust.
>
> second is speed. it looks like a 16 or 20 tooth gear. with a 5 TPI
> belt you would have between 3 and 4 inches per revolution. on a
> direct connect 200 SPR motor and Gecko that would be 333 and 500
> stpes per inch. did you use a direct drive or a set of gears/belts
> to reduce the drive ?
>
> and the last question is are you driving from one side or both ?
>
>
> Dave