[Larken]

Can you get precision gearheads for the size 34 servos? I would want about a 4-1 ratio. I think these would be popular items .

Larry K

[rustamd]

You mean like harmonic drive? I imagine it would be very expensive to properly design and make them, espesialy with no backlash... IMHO

[rustamd]

if you google "nema 34 harmonic drive", quite few choices show up, but not cheap i imagine.

Also try searching for:

nema 34 frame harmonic drive
and also search for planetary gearhead...

[Smitty911]

Applied-Motion.com

Just ordered a 27 to 1. It should be here this week.

A little over $1,000.00 each one though.

Smitty

[rustamd]

Applied-Motion.com

Just ordered a 27 to 1. It should be here this week.

A little over $1,000.00 each one though.

Smitty

thats quite a bit more reduction that 4:1 is

[Smitty911]

thats quite a bit more reduction that 4:1 is

But they also have the a full range of reductions. 1-4, 1-6, 1-27, ++++

Smitty

[RICHARD ZASTROW]

Smitty, If space is a problem, gearheads often are a good solution. If you have room, other less expensive methods are available. I've used them before and as often as not, I had problems with them. Remember, they have small gears with tiny teeth and itsy-bitsy bearing parts in them. Good quality is required. As I said, some did work. Think of the high quality planetary gears running in well lubricated automatic transmissions. Just don't try to tow a trailer full of bricks with a compact car with an auto tranny.

[Stepper Monkey]

You should check Ebay, they often have new planetaries in the box for two or three hundred dollars. A lot of 34 size go off cheap, often new. Size 23 are more in demand, but even at that I have some new ones I'd let go for a few hundred as well, even zero backlash harmonic drives. Takes some looking but there are some good deals out there from a number of surplus dealers.

[routerman]

MCG has some for around $500 each
http://www.mcg-net.com/gearheads/gearheads.html

But Keling may be able to import cheaper ones from china.

[automationtechinc]

Thank you all. I am working on it. I will post on my wensite when I get them