Re: [rp-ml] RP Holy Grail of Custome Gears

have you tried laser cutting or waterjet?

*Joshua Harker*
w: www.joshharker.com
e: info@joshharker.com
c: 773.343.2251

Andy wrote:
> Hi John
>
> How about Metal plating the RP gear? We plate onto most of the
> different RP models including Envisiontec parts and the strenght is
> increased 10 fold.
>
> If you want to give it a try then drop me an email
>
> /Kind regards/
> //
> /Andy Allshorn
> Technical Director
> AT 3D-SQUARED LTD
> /
>
>
>
>
> ------------------------------------------------------------------------
> *From:* "Mullen, John" <johnmullen@hasbro.com>
> *To:* "rp-ml@rapid.lpt.fi" <rp-ml@rapid.lpt.fi>
> *Sent:* Fri, 8 January, 2010 19:59:26
> *Subject:* [rp-ml] RP Holy Grail of Custome Gears
>
> Thank you everyone who responded to my interest for a better RP gear.
> Lots of new names and the old timers are still around as well. This
> is all good.
>
>
>
> I’ll try to give answer back to everyone in one message.
>
>
>
> A) There’s nothing wrong with machining gears, this is best, but
> our resources are limited and I can use some very skilled Model Making
> for better uses than cutting gears all day.
>
> B) I’m no engineer or machinist so I don’t have the proper lingo
> in “gear talk” but lets describe them as being small in diameter (
> 0.75” and less with many teeth ), these also include small cams and
> levers. Our quantities are small; usually need 1-3 of each gear, cam,
> and lever.
>
> C) Due to the detail and small size FDM technology hasn’t worked
> for us in the past. It has greatly improved over the past few years.
>
> D) Objet does okay but the sidewalls are rough, small features
> are weak. This leads to problems. I’ve had decent luck using Objet
> with Durus material for larger gears.
>
> E) Noise is always a problem with RP gears. This is one reason
> we machine parts. It’s tough to demo to a buyer when they can’t get
> beyond the noise. RP gear teeth like to bind and break off.
>
> F) SLS hasn’t worked due to detail and surface finish. Are there
> secondary finishing techniques.
>
> G) I get very close with SLA Viper and Envisiontec Perfactory.
> These are the most promising technologies if materials can continue to
> catch up. Great detail, accurate, smooth finish.
>
> H) First Cut Prototype……I forgot about them. This is a good
> possibility. I’ll readdress this.
>
> I) Direct metal…..I don’t know, surface finish issues again
> and detail? I need to gain more experience with direct metals. I’ve
> been in the world of plastic too long.
>
>
>
> Everyone thanks, much food for thought.
>
>
>
>
>
> John Mullen
>
> Rapid Prototype Manager
>
> Hasbro, Inc.
>
> 1027 Newport Avenue 401.727.5194
>
> Pawtucket, RI 02862 johnmullen@hasbro.com
>
>
>
>
Received on Sat Jan 09 04:09:38 2010