Re: Dedicated MH Roller Replacement - Finished.

DAD! I mean James!
    Quick question. Why are the dimensions for the bearing holders off? Going in
a 1/2 inch and doing a radius of .308 gives a bearing clearance of .618 not .625
and what is the purpose of the .188 holes in the shaft? I can see the hole for
holding the shaft for putting on the encoder wheel but why in the other roller.
I spun down a rod for 1/2 CRS for my shafts

James Marous wrote:

> Very, very cool! Feeling a little like a proud parent right now :-)
>
> To answer a couple questions: I did buy new bearings for mine, but they
> are identical to the ones used in the Centipede type mini trakball. The
> McMaster-Carr Part # is: 57177K38 and are $5 each. There are probably
> cheaper bearings available, if you want to try and find something, the
> dimensions you need are 0.250 ID, 0.625 OD and 0.196 width.
>
> I did make provisions for a light, there is a 3/4" hole in the base for a
> bulb to shine through. I have not yet wired mine up. The only problem
> might be that the base is not completely enclosed. This is easy to fix,
> either with a sheetmetal enclosure or just temporarily with cardboard. I
> can model up some side panels if anyone is really interested. The interior
> surfaces of the roller might also need to be painted black, not sure if
> having reflective surfaces in there would hurt or not.
>
> The roller studs were just standard #8 carriage bolts that I had lying
> around. I just polished the heads and coated them with some liquid teflon.
>
> Let me know the details of how your prototype went together. The prints you
> had contained some minor tweaks of the first prototype.
>
> If you do a production run, lmk... I might buy one just to see how it turned
> out.
>
> James
>
> -----Original Message-----
> From: Mark E Davidson [mailto:Burbs1@concentric.net]
> Sent: Friday, March 03, 2000 5:30 PM
> To: vectorlist@synthcom.com
> Subject: Re: VECTOR: Dedicated MH Roller Replacement - Finished.
>
> Ok I guess Im confused as well. What is the demand for just the roller and
> what it the
> demand for the whole thing? Hands please. Im working on just rollers right
> now. MY
> personal goals at this point is to add a roller to a SD -> MH conversion.
> The spinner
> is not cutting it with the exception of the breakout part of the game. :-) I
> have a
> mostly complete set up right now, missing the encoder wheel and electronics
> and the
> bearing.
> Look as http://www.basementarcade.com/arcade/library/vlist/mymhroller.jpg
>
> -=Mark=--
>
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Received on Fri Mar 3 15:40:27 2000