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[stowaway]

I am looking to create Aldoz awesome 3DOF simulator.

The only thing that puts me off a little bit is the noise made from the Winch motors.

I was just wondering if anyone has researched 24volt Motors? You could use 2 12Volt car batteries for them....

something like this:
http://www.ebay.com.au/itm/ELECTRIC-SCO ... 415e8eb30f

The problem I think is it wouldnt hold in place and it would probably free wheel....

But are there any alternatives to the Whinch motors, because I beleive its the gears that are the noisy part...

[stowaway]

Ive also foudn this. it has a worm drive so is suitable. but maybe too small

http://www.motiondynamics.com.au/worm-d ... orque.html

[AldoZ]

hi! The winches are free wheel too! Then no problems! You will set the max min run using the feedback positions from pot! (max - min positions) and your motors will have a min and max range positions and not over.

First motor seems ok but I don't think it can have some Newton power torque than a 12v motor mounted on a winch.. Just a mine impression.

Second motor seems more weak than the first.

The point is : Are there other good options if you don't want to use winch motors to build a 3dof without using some pulley system too? (a 3dof with pulley system I think it's a very ugly and without performances 3dof)

My answer is : Really hard to find some other good options... Except you have a good amount of money available to some good AC motor! (400 - 600 €)..

A winch motor is 70 - 80 € and provide a really high power torque... enought to start the think about to build a 3dof (with a lot of work and calculations off course..).

[igorhr]

hello!
I juse 24V DC motors from electrical wheelchairs
something like this :
http://www.ebay.com/itm/Merits-metro-Po ... 43aca4787c
they have very quality robust metal gearbox

and after some burn out MOSFETs (mostly P type- IRF 4905), I was find out that this motors work fine on 12V !
because of less Volts, torque was probable dropped from 10 Nm on 8 or 7, but they work
fine with me on chair (my and chair load about 100kg)
so now I juse them on my 250W PC power supply (from older PC type one) on 12V and
I use electronic fuse (just in case) to protect my H-bridge FETs
regars
Igor

[stowaway]

enought to start the think about to build a 3dof (with a lot of work and calculations off course..).

I'm more of a try and see what happens type of guy.

I'll probably end up using Winch motors. As they are tried and tested.

[bsft]

For an Aldoz style sim with lift, yes winch motors would be the go, even if they are noisy for the price.
The 12v worm gear motors ( which I use) would need to be geared and would make them too slow for race, but good for flight.
The 24v motors have possibility, but would need to have a gearbox on them to obtain the correct speed, and 24v driving them, not 12v.

[BartS]

I'm going to be using 4 x 24v and each I presume to be near 300watt and a 120rpm, 40 - 50 nm 4 a 3dof system however I do think the rpm ratio is a little too fast, they are off a 4.5mph wheelchair.

However I cant be sure what the output speed would be but I intend to use gas struts or bike air shocks to float alot of weight I have an ingenious plan for my lifting mechanism. I am quite frightened of the pitch and roll speed I will have with the power of 4 motors working in sync.

[stowaway]

I'm going to be using 4 x 24v and each I presume to be near 300watt and a 120rpm, 40 - 50 nm 4 a 3dof system however I do think the rpm ratio is a little too fast, they are off a 4.5mph wheelchair.

However I cant be sure what the output speed would be but I intend to use gas struts or bike air shocks to float alot of weight I have an ingenious plan for my lifting mechanism. I am quite frightened of the pitch and roll speed I will have with the power of 4 motors working in sync.

perhapes I should wait until your simulator is finished I look forward to seeing this ingenious lifting mechanism.
Upgrading my plans from a 3DOF to a 4DOF shouldnt be too difficult.
Do you think it would offer alot better movement?

[tahustvedt]

I'm going to be using 4 x 24v and each I presume to be near 300watt and a 120rpm, 40 - 50 nm 4 a 3dof system however I do think the rpm ratio is a little too fast, they are off a 4.5mph wheelchair.

However I cant be sure what the output speed would be but I intend to use gas struts or bike air shocks to float alot of weight I have an ingenious plan for my lifting mechanism. I am quite frightened of the pitch and roll speed I will have with the power of 4 motors working in sync.

120 rpm and 45 Nm is 565,49 W.

[bsft]

I'm going to be using 4 x 24v and each I presume to be near 300watt and a 120rpm, 40 - 50 nm 4 a 3dof system however I do think the rpm ratio is a little too fast, they are off a 4.5mph wheelchair.

However I cant be sure what the output speed would be but I intend to use gas struts or bike air shocks to float alot of weight I have an ingenious plan for my lifting mechanism. I am quite frightened of the pitch and roll speed I will have with the power of 4 motors working in sync.

Frightened! Wheres your sense of adventure!