Wormgear motors for 2DOF and traction loss

Hello,

After many days of reading the forums I decided to build a 2DOF + traction loss racing sim.
I decided to use Simtools as software, JRK 12v12 and 3 wormgear motors.
I dont know which design I will do but it will be with shoulder mounts and only seat mover ( I am 112 kg )
I have a question to you guys, I read the forum about the motors that are recommended and their specs.

• Motors with the following specs :

• Gearboxes : CM 30 U 25 56B14 , ratio 25 : 1 , aluminium case and metal gears.

Now, the motor is rated to 3000 rpm at 11.8 amps maximum, at a gearbox of 25:1 results an output of 120 rpm.

The issue is that in this combination the output torque is only 6.2 N.
Bellow is the table attached : values in red square.


Knowing that I will use this combination on a seat mover shoulder mount sim, with a lever between 50-60 mm, do you think I will have issues ?
If I want to achieve a 20N output torque with the same gearbox and ratio I must change my motors to the 250W motor which will not allow me to run my JRK`s because they need 30 amps .
This company has all combinations of gearboxes and motors.

Please give me some advice.
Thanks,
Peter.

@PetiCovaci , those motors at a 100 watts may be a bit off. Can you use the 140 watt motors?
Not sure about the gearboxes on them. Maybe buy them and thrash them to see how good they are.
Heck, I did that introducing the 200w 12v 25:1 motors in the first place. You may find what you get is more than adequate.
The JRKS will run 30 amps continuous all day with 40-45 amp spikes, which yes, does equate to a 200 watt motor. the extra 50 watts may be pushing it. Dunno, you might have to give it a try. You will not burn out the JRKS, they will simply shut down and go into error mode trying to throw big current.

Hello,

I just wrote a longer reply and I lost it......


Now the short version.


The problem is that I already received today the motors and gearboxes so I cant order something else but I can exchange them to something that`s better.


If it is so important that the motor with gearbox must have a rated output of 20 Nm then I must change my motor to a higher power one.

With double the cost I can buy the EC180. 120 / 240 with 12V or 24v input, 250 W load power .

This motor has a max load I (A) = 30 ampere at 12 V and 15 ampere at 24 volts. These are nominal rated current draws.

In a gearbox combination we can achieve the following :


25:1 – 16 Nm – 120 rpm

30:1 – 18 Nm – 100 rpm

40:1 – 22 Nm – 75 rpm


My intention was to use the Pololu JRK 12v12 x3 for my racing sim but I see that even if they are capable to give morte than 12 A , torturing them above 30A is not viable.


The other solution is to use the 24V motors with half of current, 15 ampere which sound more appealing to me. The only issue is that I know that Simtools and even XSim is working great with JRKs and now I must find another controller and driver.


I would prefer something like Arduino and Pololu mainly because I can order them from my country. I couldn`t find Motomonster and ordering from ebay and waiting 2 months is not an option.


Please give me some advices about the motor combination and gearboxes and a solution that is viable to control and drive the 3 motors for my sim.


I really appreciate your help.


Thanks,

Peter.

@PetiCovaci I would go for 30:1 – 18 Nm – 100 rpm, also I don't think you need 5cm levers for a shoulder mount config.
As @bsft already told you, JRKs works fine at 30amps all day no prob with good ventilation. Also, I don't have experience with JRKs but at least in the settings app for arduino (SMC3), I can set how much power my motors draw and I'm almost sure you can do that also in the JRK settings app. I weight the same as you I have 120watts motors in a foot mount config. and I don't have any probs running my motors at 11V for example.

Ty for your input.

Regarding 24V motors , is Arduino and Pololu Dual VNH5019 Motor Driver Shield for Arduino a good solution ? Can it be implemented in Simtools ?
24 V PSU`s are not a problem to buy, 50 euro per piece.

What other solutions for 24 motors we have ?

Putting those JRK 12v12 on a 250w motor with a 30 amp draw is a bit overkill, I better go on the safe side.

@PetiCovaci , you have missed the point 3 of us gave you regarding the durability and power that a JRK can push out.
So , apart from 30:1 boxes to get decent torque for a shoulder motor mount rear sim......do whatever you like.

@bsft I didn`t missed any of the points, only that my supplier has only the 24V version on stock from the 180 (250 W load) motors. Beside, I was only asking for an alternative to JRK`s.
My initial plan was to use 3 JRK`s and 3 wormgear motors for a 2dof and traction loss, I can still do that now that you all said that those JRK`s will do the work with apropriate cooling.
I will order the bigger motors with the 30:1 gearbox and also buy 3 JRK`s and 3 Dell server power supplies.
This week I will start building the frame and keep you posted

Do you think that the 100W motor with 25:1 gearbox can handle the traction loss ? Then I will have 2x250w 30:1 motors for shoulder movement and 1x100 25:1 for traction loss.

L.E.

I have an option to use an encoder with a 300 resolution but I must mount it ant the motor and not after the gearbox, so I will need to input the ratio in Simtools. Is it possible to use this kind of encoder instead of potentiometer ?

Bellow are the encoder specs.


Ty,
Peter.

I need a 12 0r 24v dc motor to drive the pitch of a flight sim I'm working on. I'm hearing 8 rpm is all that is needed. Does anyone know of a gear motor that is like really slow with loads of torque? Could I use sprockets on the Pgsaw 50:1 referenced above to give me the lower rpm and torque I need? Any advice would be appreciated