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Re: About new gap design
Hi Ralph,
It is possible to borrow a machine tool technique for woodworking
equipment. When trying maintain accuracy on an older/worn manual machine
tool you can mount a dial indicator with a magnetic base along the
machine axis you are trying to control. With woodworking equipment you
probably won't have a nice cast iron surface to mount to so a clamp
would have to be rigged up. I have seen many 1" travel dial indicators
for sale in my area at swap meets and sometimes up to 6" of travel. With
a smaller travel you would have to reposition the indicator with the
tool locked in position for each cut but this would still control the
increment between slots quite accurately.
NOTE: keep the shaft of the indicator as straight as possible to the
axis of motion to avoid cosine error affecting your accuracy.
Safe coiling and woodworking,
Phil Heslin
Tesla List wrote:
>
> Original Poster: Parpp807-at-aol-dot-com
>
> In a message dated 2/19/00 7:13:23 AM Central Standard Time, tesla-at-pupman-dot-com
> writes:
>
> << and an accurate measuring device
> >>
> Hi Ed, Scot,
>
> Scot, I'm gonna start on your gap. As you mentioned previously, it is
> necessary to locate the parallel ditches very very accurately. I plan on
> using a radial saw so I'm looking down on the work. Will very light cuts with
> a 1/2-inch dado cutter work? Will 1/32 of depth be enuff to seat the
> cylinders? Do you think that will work or should I find a machine shop with
> a good milling machine? It is the inability to lock the spacing without
> changing the gap spacing that makes me unhappy with my eight-piece straight
> gap. In your design the groove spacing is very critical, screwing that up
> will wreck the gap. I am highly impressed with the general design.
>
> Cheers,
> Ralph Zekelman