Re: [CAD_CAM_EDM_DRO] spindle plans

Hi henrik;

Got the pics - very interesting.

As to run out I'm not sure if one could do much better with simple
tooling and plain bearings. I'm by no means an expert in things like
wear, I suspect though that materials machined will have some impact on
that. For me considering that I'm considering engraving with the
spindle and other small work it could be excessive.

Thanks
Dave


Henrik Olsson wrote:

>Hi Dave,
>Pic's sent to you off-list.
>Les and others are right. The ER16 collet-chuck will be hardened (mine were)
>and it will be hard do any machining on it. That's why i used rings on the
>shaft to hold the bearings in place. A machinist at work helped with the
>housing, it's turned to Ø43mm at the top end so it can be fitted to my
>machine instead of my 600W Bosch router. Both the bearing and rings where
>glued to the shaft with loctite and will be hard to replace without
>destroying them. But why would you replace them if they aren't broken.
>
>I put a 6mm endmill in a collet and put a dial indicator on the cylindrical
>shaft of the endmill and the needle stayed within 0.01mm when the spindle
>was turned. (That's ~0.0004") Is that OK or will I spend all my money buying
>new endmills since they'll wear out due to runout?
>
> I'll take some more photos of it mounted on the machine this weekend.
>
> /Henrik.
>
>PS. If someone could upload the pic's to Yahoo for me that would be great!
>Or tell me where the heck the upload button has gone.
>
>----- Original Message -----
>
>
>>I'm willing to recieve such info of list if you can't get up load to
>>work. I'd prefer that everybody get the chance to see your unit.
>>
>>I've been slowly collecting materials to build some machinery. The
>>thought right now is for a gantry type machine with several head that
>>could be attached. THe ER collet extension idea is really starting to
>>look good to me, so seeing other ideas would be very helpfull. I've
>>taken many a spindle apart over the years so I have some idea as to how
>>they work. For high speed routing I'm thinking that one could get by
>>with cheap components.
>>
>>Thanks
>>dave
>>
>>
>
>
>
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