Re: [CAD_CAM_EDM_DRO] Re: VFD's / Skates

Brilliant stuff. Thanks for the help. I will read through it again in a
minute to be sure I've understood it all. Now all I need is to find the
price of this VFD and I'm ready to revoice my case. Why is it the VFD is the
way to go? I suggested a static phase converter at first. Why do I need a
fancy button to change the speeds when there is a leaver to do it the belt
way? If a VFD is going to be twice as much as a static converter it better
do more than change the speed and direction of rotation. What happens to the
resonators out of those laser cutting tables? I know one particular 17 year
old who'd love to have them if they're free! [grins]

John #2

> John.
> I took a look at those skates and they are way too big. No way
> anything this long will manage a turn. They are far more complex than
> needed.
> I've posted a very quick and dirty sketch along side yours in the
> photo's section. Not come out too clear so a quick description.
> Get a piece of 5" x 3" channel about a foot long. You need four of
> these. Then cut up a length of thick walled scrap steam pipe about 1"
> in diameter so that they fit between the side webs. You need a total
> of about 24. Then find a length of steel bar that fits inside the
> pipe and cut this to the width of the channel, again you need the
> same amount as the rollers. Cut a series of notches in the two edges
> wih a hacksaw about every 2" so the steel bars sit in flush.
> Then assemble the rollers on the bars and weld the bars to the
> channel. When it's cooled squirt a drop of oil into the rollers.
> Turn over and drill a 1/2" hole central and between rollers to accept
> a pin or bolt so you can secure these via the corner mounting bolts
> of your machine so you don't loose a skate when shifting the machine
> That's it job done and you have a good set of rollers without a lot
> of work.
> I've made at least 10 sets this way and every time we go to move
> machinery the customer ends up buying them off us. In fact we are on
> a big machine move this month, Two laser cutters being moved out for
> scrap, another being relocated and a new one being delivered on the
> 15th.
>
>
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