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Re: Wire EDM for 150% of SPI Cost!
Posted by Raul at 03/07/2001 1:59 PM EST
Engineer on team #111, Wildstang, from Rolling Meadows & Wheeling HS and Motorola.
In Reply to: Wire EDM for 150% of SPI Cost!
Posted by Joe Johnson on 03/07/2001 9:58 AM EST:
Ouch!
I hope this does not make you feel bad - our shop charges $75/hr and we were able to get four 50-tooth sprockets for less than an hours work on a laser. But then the students clean up the parts by chamfering the edges on a sander and deburring on a wire wheel. Wire EDM is much more expensive (longer run time) than a laser for thin parts such as sprockets.
My advice is to tell your shop to leave it rough and that you will clean it up yourself. This will always save you a considerable amount of money an it allows the students to actually participate in the fabrication of most parts.
We attach (with screws) all sprockets to hub turned on a lathe.
Raul
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