3
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Harmonic drives in hobby projects
It is also worth thinking about why you want to minimize backlash. Is it something intrinsic to the task your arm needs to perform?
Industrial robots use these drives to minimize backlash ...
- 230
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Robot mechanism parts names
This is called a Stewart platform. You can use any linear actuator type, hydraulic, pneumatic or electric.
- 501
2
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Mounting gear on a servo
The attachment of something that's screwed in is not so much the screw, as it is the friction between the material around the screw (the "faying surfaces.")
If you have good friction, and the load/...
- 720
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Stepper drive resolution
G'day,
For question 1, your knowledge of the standard convention for notation is correct. However, it's worth noting that the listing for the gearbox ratio isn't 1:64, it's 1/64, which is a slightly ...
- 46
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Stepper Motor: Direct Drive vs. Belt Drive vs. Geared Stepper Motor
Vibration is a matter of optimal motion control problem, not the type of motor that is used (as long as you used more than 16 micro steps for your steppers). You already used AccelStepper which is the ...
- 1,577
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What does the number of teeth in a gear determine (when meshing identical gears)?
So, assuming that the more teeth that there are, the smaller the teeth become (and logically for gears with few teeth, the bigger the teeth are):
Big teeth:
Capable of handling higher load
Capable ...
- 1,657
1
vote
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Increasing Torque by either doubling servos or building a gear box
Installing a second servo for moving the same axis might be problematic from a controls point of view. Since (I assume) your servos are position controlled (and not torque controlled) delays in ...
- 6,682
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What do the model numbers in Harmonic Drive gear drives represent?
It is the pitch diameter of the flex spline in inches/10. You can see it used it their equations for thrust force on the wave generator.
- 4,455
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My obstacle avoiding car doesn't work with dry cells
It could be that you are not delivering enough Power (Watts) to the motors when using a battery. This could mean not enough Voltage and/or not enough Current.
It is a common difficulty for a battery's ...
- 1,157
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What’s this gearbox called?
I don't know what this is called, but my suspicion is that this mechanism makes use of something very similar to a differential gear.
When the drive shaft is rotating in one direction, the pinion gear ...
- 4,273
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How to design a representative drive cycle based on speed, acceleration, and torque requirements?
What you've given are performance specifications, not really a full drive cycle, so you can do some analysis on requirements based on those performance specs but you can't, for example, use those ...
- 15.9k
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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?
You need to consider both the max rated input speed of the drive (as another answer suggests) as well as the rated torque of the cycloidal drive.
The rated torque is the torque at which the drive can ...
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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?
Almost...
You will have some losses in torque due to fiction and the elastic deformation needed for the cycloidal drive.
Your math, other then losses, is fine, but you have to consider also the ...
- 6,682
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How much weight can this DC motor carry?
It seems to me that a credible estimate could come only from someone with a lot of experience with RC cars similar to your design. It depends on many things that aren't all that easy to measure or ...
- 1,346
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Motorised steering without shock absorber?
My bet is on a PMSM not a stepper, but that cannot be determined from an image. A non-back-driveable mechanism is advantageous, and can reduce the steady state power consumption of a system. It does ...
- 6,682
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Bevel Gear Compatibility
Bevel gears are not generally interchangeable. For a bevel gear set to work, the virtual cones generated by the pitch (or root) angles of each gear have to meet at the pitch apex. The image below ...
- 11
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Drive axis with slipping gear
Thanks to the comment of @jsotola (pls. give him an upvote) with the manual transmission parts I found out that this is called the reverse sliding gear and the reverse sliding gear shaft when used in ...
- 121
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Driving a gearbox with another?
I think that on the attached picture, the two things from the right, are a stepper motor and encoder. Notice that both have wires coming out of them. So it is not an example of two gearboxes in series....
- 953
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Making a motor controlled joint passive
Depending on the motor type, you may be able to freewheel the motor. With a brushed DC motor this could be achieved with most commercial H-bridges, controlled with fast current decay.
Flyback diodes ...
1
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motor controlled lazy susan
You can design, or purchase, a simple rotary table. I have used Arrick robotics over the years, and they have a relatively turnkey system for $300 here: https://www.arrickrobotics.com/rt12.html
If ...
- 4,416
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Why are strain-wave/harmonic gears used in robots?
Strain wave gears have practically zero backlash and high torque density (i.e. torque per unit weight) compared to other solutions available. Gearbox weight is important in articulated arms, since it ...
- 338
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Robot clutch to disengage wheels
If your robot's drive wheels always move in the forward direction, you may be able to design in a wrap slip clutch device. This device would tighten a beefy spring around the driven shaft when the ...
- 4,416
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Robot clutch to disengage wheels
How about a electronix solution, at the moment i guess your motors are controlled by a H-Bridge or similar, by rotating the motor you are generating a current which generates a magnetic field in your ...
- 37
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One motor, two wheels (motor direction rotates one wheel forward, reverse for other wheel)?
A freewheel clutch attached to each wheel will do what you want.
When turned in one direction the clutch will transmit power to the wheel but in the opposite direction it will free spin.
This way ...
- 111
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One motor, two wheels (motor direction rotates one wheel forward, reverse for other wheel)?
Are you talking about a bevel gear? Here's a video - the gold gear would be connected to the motor and the blue gears would be connected to your wheels.
Both wheels are always powered - one is ...
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