We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [gearing]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
1
vote
1answer
52 views

Robot mechanism parts names

I'm working on my first "robotic" project that involves a square platform that should drop one of the four sides at a time. ...
2
votes
1answer
35 views

Stepper drive resolution

I'm asking for help on understanding stepper motor + gearbox solution, as I've got totally confused during my research on topic. Story: Trying to make a sort of precise turning table (at least 1°/...
2
votes
1answer
34 views

Driving a gearbox with another?

I'm trying to find a 1:1000 gearbox for NEMA 17, but the highest (affordable) one I've found is 1:100. Is it a good idea to drive a 1:100 planetary gearbox with a 1:10 planetary box? Is it common to ...
3
votes
2answers
71 views

Making a motor controlled joint passive

Anyone know of a good (and economical) way to make a motor controlled arm become a passive link on trigger? That is, the joint can be active (motor controlled) or passive (rotate freely). The tip of ...
0
votes
1answer
65 views

motor controlled lazy susan

I'm trying to figure out an easy lazy susan setup. This is for video production, I want to be able to put an object on the platter and get a smooth consistent turn in order to shoot the object ...
1
vote
0answers
39 views

Why are strain-wave/harmonic gears used in robots?

Also, what is the difference between the above gear drive vs other gear drives?
2
votes
1answer
36 views

What does the number of teeth in a gear determine (when meshing identical gears)?

Suppose I want to mesh two identical gears (size and number of teeth). What would be the difference if both had 12 teeth versus both having 48? Assume the motor spins at the same speed in both ...
0
votes
1answer
334 views

Increasing Torque by either doubling servos or building a gear box

I'm looking here for suggestions. I have a HS-805BB with Torque (Kg-cm/Oz-in): 24.7/343 @ 6.0 V to rotate a robot body up and down from one side. It seems to me that this servo is always running at ...
0
votes
1answer
30 views

What do the model numbers in Harmonic Drive gear drives represent?

According to one of their brochures, Harmonic Drive numbers their models with numbers like 8, 11, 14, 17, etc. I noticed that Chinese suppliers like Laifaul have a similar numbering scheme, though it ...
-1
votes
2answers
645 views

DC geared Motor 20 NM 25 RPM small dimensions. [closed]

My application requires a DC geared motor with torque of 10 NM - 20 NM and low speed (25 RPM at most) and a small dimensions (120 mm length at most). I failed to find my specs at eBay, and Alibaba ...
1
vote
0answers
64 views

Design of an equatorial mount [closed]

I am considering designing an equatorial mount for astrophotography. I have been researching on the best way to do that and I am thinking on using a stepper motor with a gearbox. The thing is that it ...
1
vote
1answer
417 views

Mounting gear on a servo

The outputs of most hobby servos is a spline. To mount a custom gear on the spline so that the servo turns the gear, how should it be best done? I see that some people just screw the gear into the ...
0
votes
2answers
419 views

Robot clutch to disengage wheels

I have a robot that moves around autonomously. Very often I want to push the robot several feet to start a test over again, or sometimes I want to wheel the robot outside to my car or to a nearby ...
1
vote
3answers
3k views

One motor, two wheels (motor direction rotates one wheel forward, reverse for other wheel)?

Rewriting this whole question as I've learned a lot more since I first tried to ask. I'm building a tiny bot and looking to use two motorized wheels for movement, but only one motor. I'll have a 3rd ...
4
votes
3answers
3k views

Harmonic drives in hobby projects

After a fair bit of research into industrial robot arms I've learned that a lot of them use components like harmonic drives and sometimes cycloidal gearboxes. Two main questions: How feasible are ...
2
votes
2answers
189 views

What is the torque transmission efficiency using a bycicle chain/setup for robot?

For this robot the gear attached to the motor is linked to the gear attached to the wheels by a bicycle chain (I am using a bicycle wheel and transmission set as the parts for the robots movements). ...
3
votes
4answers
112 views

Motor Choice given size constraint and load requirement

Good day everyone :) I am an undergraduate student working on a project involving the use of high torque small-sized DC motors for use in designing a person following trolley bag. Where in the ...
1
vote
3answers
61 views

Is this supposed to be a bearing?

I'm looking at the assembly of a tail rotor that should look like this original image I wonder if the "tail output shaft stopper" (circled in red) is meant to be a bearing or just a piece of metal ...
0
votes
1answer
77 views

Metal shaft design for a 6mm plastic bevel gear

I have a small POM bevel gear with these dimensions: It has a 6mm hole for the shaft and a M4 hole for the set screw. Suppose this bevel gear is meshed with a 45T bevel gear and give a max. output ...
0
votes
1answer
357 views

How to implement transmission in tracked chassis with one motor?

I see that in small robots tracked chassis is implemented with 2 motors, each powering one side of the vehicle, like this: (image stolen from here) But in real scale tanks I assume there is only ...
3
votes
1answer
74 views

POM gears and metal fittings

I'm looking at this setup: where the POM bevel gears are fitted with some kind of metal (bronze?) tube inside which fits over the shaft. What benefits does this method provide? Is it to allow the ...
1
vote
2answers
128 views

Suitable gear construction for a robotic extender - plastic?

I have a rather simple setup for my robotic extender. The DC motor turns a shaft with a worm on it. The worm connects to a small worm gear (green) which itself has a small gear (red) on the same shaft ...
4
votes
1answer
83 views

Attaching a M5 screw shaft to a cog wheel

Does anyone know of a good (low profile) way to attach the threaded (chamfered) end of a M5 screw shaft to a 30MM (30T 1M) plastic cog wheel? Would it be a good idea to widen the shaft hole and just ...
3
votes
2answers
1k views

Lifting robotic leg with only one servo

Note before I start: I have not actually put anything together yet, i'm still just planning, so any changes that require a shape change or anything like that are accepted. I'm working on making a ...
0
votes
1answer
171 views

Difference between planetary and precision gear motors

i'm working on a building a rover and would like some advice on selecting motors. In particular, i want to understand the difference between precision and planetary gear motors. My robot will way ...
0
votes
3answers
154 views

Questions on gears for a robot actuator [closed]

I have some questions regarding building a gearbox for a motor to create a robot actuator. Given my desired motor and loads, I've determined that a gear ratio in the 400-700 range is adequate for my ...
3
votes
3answers
2k views

How high of a gear ratio can a motor have?

I want to make a robot arm where a joint is powerful enough to lift 8 kg up at a distance of 1 meter. This requires torque $tau = r*F = r*m*g$ = about 80 nm. So now I am trying to find the ...