Questions tagged [gearing]

Arrangement of toothed wheels (gears) to transmit motion and power

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What’s this gearbox called? [closed]

I took an apart a child’s toy because it looked like it had a neat gearbox in it, it did. The problem is I have no idea what type of gearbox is and I wanna see more things used with it. It rotates ...
Ivan Gloss's user avatar
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1 answer
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How to design a representative drive cycle based on speed, acceleration, and torque requirements?

I recently came across the topic of "drive cycle design". I would like to learn more about this as I delve into motor and RC vehicle design. Given: the RC vehicle must achieve 25mph max/...
tniles's user avatar
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How to maximize top speed potential for a given motor? [closed]

I have an engineering background however I am new to motors. I am looking to understand what the options exist for maximizing the top speed a motor can produce (say for an RC vehicle) without simply ...
tniles's user avatar
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What geared mechanisms can convert various weak stepper motors drive inputs into a higher torque output?

I'm interested in making an arduino robotic arm for something that need precision and/or torque (like CNC), but first, I'm exploring/searching what I would need and how much it would cost. What I ...
Fulano's user avatar
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2 answers
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Will using a 1:50 cycloidal drive on a 10,000 RPM brushless motor actually spin the output shaft at 200 RPM with 50x the torque of the motor?

In short, I'm trying to build a high-torque and high-RPM robotic arm, and I think brushless motors are the best compromise. The motors I'm considering are 400KV, and are supposed to run on 6S. Are ...
CorruptedJef's user avatar
1 vote
1 answer
167 views

How to calculate operating torque and holding torque of a slew drive for a manipulator arm?

Hope you are doing good and enjoying your weekend. I have a question regarding calculation of torque and tilting moment for a slew drive. Slew drive (motorised) will be used at the base of a ...
techno's user avatar
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How much weight can this DC motor carry?

I'm trying to make a RC Car with a total weight around 1kg. It will be 4-wheel drive with differential drive algorithm. The count of motors will be 4 DC motors simply. I have chosen the following ...
Karnik Kanojia's user avatar
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1 answer
162 views

Rack and Pinion Gear for CNC

I am trying to build a small 3D printed CNC machine but can't afford lead screws as of now. I need to 3D print a lead screw or use a rack and pinion gear system. I am a little skeptical able the rack ...
DragonflyRobotics's user avatar
2 votes
1 answer
542 views

Stepper Motor: Direct Drive vs. Belt Drive vs. Geared Stepper Motor

I have built a juggling machine. Each arm is driven by a 4A 23mm stepper motor. The motors are each driven by a TB6600 set to 800 microsteps. By trial and error, I have found that the motors skip when ...
Stephen Meschke's user avatar
1 vote
1 answer
178 views

How to solve this differential equation using ode23?

Hello! :) What I have here is a gear system I need to simulate using MATLAB and Simulink. To do that, firstly I need to get the differential equation for this rotation (gear) system. I think I ...
BigDuckPlaya's user avatar
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Why isn’t my shaft moving? [duplicate]

When I put my shaft through the vehicle body (small robot) and have the motor attached to it through two rotating gears, the shaft isn’t rotating? I think it’s due to how the hole diameter is the same ...
Ralph Faure's user avatar
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Can we reduce pitch of a lead screw to reduce backlash of the lead screw?

In gear design, the backlash is introduced in the design itself (not by tolerances of manufacturing) to allow free meshing of the gears. The backlash in the design can be minimized by reducing the ...
Khushal Badhan's user avatar
1 vote
1 answer
44 views

Motorised steering without shock absorber?

I was looking up on the Curiosity Mars Rover and noticed that the steering appears to be driven by a (geared) stepper: I presume the drive contains a worm gear to reduce power consumption of the ...
John M.'s user avatar
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1 answer
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Bevel Gear Compatibility

ServoCity sells a great little 2:1 bevel gear ratio set: 2:1 Bevel Gear Set (1/4" Bore Pinion, 1/4" Bore Spur) I have it currently set up in my project and was thinking a 1:1 gear ratio ...
PatchB's user avatar
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How to make small quantities of gears

For a hobby project, I'm designing a clock with a single hand that makes one revolution per year. Using really helpful sites like https://geargenerator.com/, I have the gear ratios and dimensions ...
Ken Williams's user avatar
1 vote
1 answer
60 views

Drive axis with slipping gear

I'm looking for a name of the mechanic part (axis-gear combination) with the following description to use it in an automatic window control. I can't find this online to get parts due to the lack of ...
Sebastian Barth's user avatar
1 vote
1 answer
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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. ...
KeepLearning's user avatar
2 votes
1 answer
170 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°/...
Denis.Z's user avatar
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2 votes
1 answer
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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 ...
Kar's user avatar
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3 votes
2 answers
127 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 ...
John M.'s user avatar
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2 answers
314 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 ...
Justin's user avatar
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2 votes
1 answer
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Why are strain-wave/harmonic gears used in robots?

Also, what is the difference between the above gear drive vs other gear drives?
Hasan A. 's user avatar
2 votes
1 answer
397 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 ...
Jet Blue's user avatar
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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 ...
Iron Fist's user avatar
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1 answer
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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 ...
guero64's user avatar
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-1 votes
2 answers
1k 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 ...
Anas Albakri's user avatar
1 vote
0 answers
127 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 ...
borias23's user avatar
1 vote
1 answer
2k 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 ...
John M.'s user avatar
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0 votes
2 answers
697 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 ...
NickF's user avatar
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1 vote
3 answers
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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 ...
Mythics Winter's user avatar
5 votes
3 answers
5k 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 ...
JDS's user avatar
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2 votes
2 answers
266 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). ...
Square79's user avatar
4 votes
4 answers
141 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 ...
lyrad's user avatar
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1 vote
3 answers
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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 ...
John M.'s user avatar
  • 553
0 votes
1 answer
103 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 ...
John M.'s user avatar
  • 553
0 votes
1 answer
498 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 ...
Marian Paździoch's user avatar
3 votes
1 answer
114 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 ...
John M.'s user avatar
  • 553
1 vote
2 answers
140 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 ...
Kar's user avatar
  • 229
4 votes
1 answer
109 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 ...
WKleinberg's user avatar
4 votes
2 answers
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 ...
ruckus's user avatar
  • 163
0 votes
1 answer
181 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 ...
mike01010's user avatar
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0 votes
3 answers
193 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 ...
JDS's user avatar
  • 419
3 votes
3 answers
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 ...
JDS's user avatar
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