Re: [CAD_CAM_EDM_DRO] Spindle design ?

turbulatordude wrote:

>Hi all,
>
>I lost the spindle on my T-Tech PCB and they want $500.00 for a new
>motor, and another $500 for the spindle/bearing assembley.
>
>the motor appears to be a custom thing, and unfortunaltly, one of the
>magnets let lose and shattered.
>
>So, I am in need of a new spindle.
>
>I purchased a CNConabudget spindle, but am not happy with the
>precision. The T-Tech can cut 0.005" lines, but this is cutting lines
>that are much larger.
>
>So, I am thinking of making my own.
>
>
>

If you really want a fine spindle for PCB drilling and fine trace
milling, get a
Westwind PCB spindle on eBay. You can run these from a standard
VFD up to 400 Hz (24000 RPM) or 1000 Hz (60,000 RPM) with some VFDs.
(You need to add output reactors - I can help with that.)
The air-cooled Westwinds are pretty loud and require a lot of air. The
water-cooled ones are a lot quieter and more conservative with air, but
you have to watch out for ones that got clogged up and burned out the
motor windings.

Jon