On Sun, 05 Oct 2003 12:48:56 +0200, you wrote:
>nice to hear there is some progress.
>
>you want to use a 540 motor i guess.
>i can only suggest to go for a 600 size instead.
>those 540 size is only used because of limitations by club/ racing
>guidelines for cars.
>
>I suggest using the jamara venti series. these motors cost maybe 20% more
>(so 12 eur instead of 10 at expensive model parts shop) but have a built in
>fan. they really run very cool with that fan inside (think about it....).
>there are new high speed series from jamara which go up to nice 20krpm
>drilling speeds.
>the 600 size costs the same and is much more efficient because of longer
>magnets and rotor.
Looks like RC cars are your hobby then :)
>the idea with the own spindle is good, i saw a nice one on the web (sorry
>hav no url).
>the guy used two counterloared bearings and got much better results than
>with a dremel (because
>of which there was the need for a new spindle).
I don't know if the results will be better, but do expect it so. My
main motivation was to build the absolutely cheapest cnc drilling
machine possible and a dremel or proxxon tool would just have raised
the costs dramatically. It's not that I would not spend the money for
one of those. I simply wanted to see how cheap I can end with
something still working usefull.
>i saw the own spindle coupled with a piece of compressor airhose.
>i would prefer that over a "metal" cardan. better for high speed i think.
>
>(addition to the usefulness of plans: here in europe it may be much harder
>to get
>the needed items, so it makes additional sense to not sell it here)
>
>
>the non-moving table has the following advantages:
>you can rise/lower it more easy to take thicker parts (objects to mill one
>side).
>you can try other milling methods like edm and similar stuff.
>
>i see with drawer slides there is much advantage in mounting with a moving
>workpiece setup (in one directon).
>but with the pipes/bearings ther is not so much advantage left (they can
>support themselves etc...).
>
>i am still not sure which way to go...
>
>your control setup sounds very interesting, but maybe a bit too complicated
>for me.
>(i hoped there are free dos based tools for parallel port drive available)
>
>have you done software research? what is available?
>i will check today - ignored the software until now totally....
Main main profession is writing software. I do this now for over 20
years and have (among obviousely many many other things) developed all
the firmware for the single board computer mentioned including a
complete TCP/IP protocol suite, HTTP server etc. etc. There is also a
lot of information around on the web when it comes to controlling
steppers. So, what I'm trying to tell is that I'm going to write my
own software. That's mostly for the fun of it and nothing more. I
surely will present at least the machine part of my work on a
dedicated webpage once I'm there. I'm not in a hurry though.
With regard to software that controls the lpt port of a DOS machine, I
heard that "PC NC" is having a good reputation. There are plenty of
other sources around too.
Markus