Re: [ATM] mirror making machine

[James P Crombie <jpcrombie@pei.eastlink.ca>]

Dave
  See my site at http://www.jamescrombie.com/pics/  for my mirror 
grinder.  Let me know if you have any questions.

David Williams wrote:

>Hello list
>
>Does anyone know about making a mirror making machine?  I have two motors (both run on 120 V AC and run at 1725 RPM, but the shafts are different (both run at 1/2 hp and one is a Baldor type)).  The one that is Baldor type is hooked up to a double worm reduction box that slows the 1725 RPM down to 11.5 RPM.  Last winter I used the motor and gear box with the shaft sticking straight up and a crank on it and a connecting rod and a mirror mount to make a crude mirror grinding machine.  It looked like this:
>
>         connecting
>       ____rod______
>____|__          ____|___
>-motor            mirror                            The only thing is I have to be there to make sure 
>gear box                                            that the mirror (when mirror is on top) doesn't                                                                 move off center of the tool and fall off onto the                                                             ground.  Although it's only up a few inches.
>But I've seen other designs where they have another connecting rod that provides a solution to this problem.  Can any one explain why it is necessary to have the mirror and tool going at a random rate?  And how to get a machine that can approximate this?  Does anyone have a 2 motor type design for a mirror grinding machine?  One that would use pulleys as well?  Thank you 
>
>David Williams
>dwilliams1128@earthlink.net
>Bye
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