Any electronics and mechanics experts here?

newarts · 04-05-2012, 09:36 AM

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Originally posted by Nass

Nah, nothing like that. I just want to be able to adjust a specimen's orientation to get a better pose without touching it. It all has to sit in a universal stage type construct and there's very little room to adjust anything, so electronic mechanical rotation is the best option...

Good idea! I don't know if a battery clock runs backwards by reversing the leads (I'll check what I have) but there are many 1rpm motors that will do so!

Here's just what you want perhaps (I just bought one!):
http://www.ebay.com/itm/SMALL-GEARED-MOTOR-DC-MOTOR-12V-1RPM-STOCK-for-Handm...item231be385c1

Last edited by newarts; 04-05-2012 at 09:42 AM.

Nass · 04-05-2012, 10:15 AM

Yah know, I was thinking, if your rotator doesn't work out due to alignment, it might be worth trying another with a bit more torque on its side to drive a tanktrack shape mechanism, using a rod and rubber band on which something is mounted - and using an intervalometer to take pics x microns apart?

Thanks for the link, too big =(. I'm after something about 10mm high max =(

**grhazelton** · 04-06-2012, 02:34 PM

At one time Edmund Scientific carried the sort ot stepping motors, etc, which might work for you. Edmund Scientifics: educational toys, gifts, hobby supplies & science equipment There is also American Science & Surplus which carries an amazing arrary of stuff. American Science & Surplus : Items Just Off the Truck

Do let us know how the project turns out.

newarts · 04-06-2012, 03:29 PM

@Nass

Maybe a speedometer worm gear drive assembly will work for you. It isn't electrical but is pancake shaped with a worm gear drive; twist the cable end and the center of the pancake (at a right angle to the cable) turns. The gear ratio there is big (up to 70:1) and I think you could do small rotary adjustments with such a thing.

scooter speedometer drive | eBay

It is flat like you want.

Dave

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04-05-2012, 09:36 AM	#16
newarts Inactive Account Join Date: Dec 2008 Location: Ames, Iowa, USA Photos: Albums Posts: 2,965	Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here. Originally posted by Nass Nah, nothing like that. I just want to be able to adjust a specimen's orientation to get a better pose without touching it. It all has to sit in a universal stage type construct and there's very little room to adjust anything, so electronic mechanical rotation is the best option... Good idea! I don't know if a battery clock runs backwards by reversing the leads (I'll check what I have) but there are many 1rpm motors that will do so! Here's just what you want perhaps (I just bought one!): http://www.ebay.com/itm/SMALL-GEARED-MOTOR-DC-MOTOR-12V-1RPM-STOCK-for-Handm...item231be385c1 Last edited by newarts; 04-05-2012 at 09:42 AM.

04-05-2012, 10:15 AM	#17
Nass Veteran Member Join Date: Aug 2009 Location: The British Isles Photos: Gallery Posts: 2,402 Original Poster	Yah know, I was thinking, if your rotator doesn't work out due to alignment, it might be worth trying another with a bit more torque on its side to drive a tanktrack shape mechanism, using a rod and rubber band on which something is mounted - and using an intervalometer to take pics x microns apart? Thanks for the link, too big =(. I'm after something about 10mm high max =(

04-06-2012, 02:34 PM	#18
grhazelton Loyal Site Supporter Join Date: Jul 2007 Location: Jonesboro, GA Photos: Albums Posts: 1,972	At one time Edmund Scientific carried the sort ot stepping motors, etc, which might work for you. Edmund Scientifics: educational toys, gifts, hobby supplies & science equipment There is also American Science & Surplus which carries an amazing arrary of stuff. American Science & Surplus : Items Just Off the Truck Do let us know how the project turns out.

04-06-2012, 03:29 PM	#19
newarts Inactive Account Join Date: Dec 2008 Location: Ames, Iowa, USA Photos: Albums Posts: 2,965	@Nass Maybe a speedometer worm gear drive assembly will work for you. It isn't electrical but is pancake shaped with a worm gear drive; twist the cable end and the center of the pancake (at a right angle to the cable) turns. The gear ratio there is big (up to 70:1) and I think you could do small rotary adjustments with such a thing. scooter speedometer drive \| eBay It is flat like you want. Dave