I am looking for a gear that will slip on a shaft with a little friction. My design is a small shaft that can be turned with a servo or a manual knob. I am looking to connect the servo to the shaft that will turn the shaft when the servo is activated but will also also a slip when the shaft is turned manually with the knob to protect the servo. Any thoughts or keywords that I can google such a gear ? The shaft assembly is 1/4 inch and the torch needed is very small 9 oz (±)
If you turn the shaft manually, do you want the servo to turn as well?
If so, consider the following:
robotshop.com/en/lynxmotion-axis-lpa-01.html
robotshop.com/en/lynxmotion- … r-hub.html
robotshop.com/en/lynxmotion- … at-02.html (several lengths available)
Note that the servo should not be powered if you rotate the shaft manually.
If you need the shaft to rotate when the servo is powered, you would be looking at a clutch system.
I am new to servo operation. Can the servo be turned manually when OFF without damage ? The shaft assembly is parallel with the servo gear. I am testing with an SM-S2309S servo but open to others. Does anyone make a belt drive gear for servos ? The shaft operation is 1 full turn and I could use a 1:2 ratio to get full movement with a 60 degree servo. I have an image but it was invalid when I tried to attach.
Jerry
We’d suggest a normal Hitec servo such as the 422 or 645MG:
robotshop.com/en/hitec-hs422 … motor.html
robotshop.com/en/hitec-hs645 … motor.html
Most R/C servos rotate only 180 degrees, so you’d need at least a 2:1 gear ratio to get 360.
We offer a timing pulley and belt system:
robotshop.com/en/mxls-01-hit … ulley.html
robotshop.com/en/12-mxl-timing-belt.html
robotshop.com/en/8-mxl-timing-belt.html
robotshop.com/en/25-mxl-timing-belt.html
robotshop.com/en/60-tooth-mx … ulley.html
robotshop.com/en/14-tooth-mx … ulley.html
If the servo is not powered it can be turned by hand, though it may create a little back-EMF.
Thank you for all your feedback. The Hs422 are to big. I am also looking at the MX-30. I have a few different servo and they all have different size spline shafts how are they measured ?
The servo spline is often different even between models from the same manufacturer, so when considering accessories which require a specific spline, it’s best to opt for one of the suggested servos rather tan chancing it with another manufacturer or other servo line.
Can you recommend a Hitec servo or suggest a manufacturer that has the same specs as the MX-30 or SM-S2309S (Physical size) ? This design may go into production and we will need to find a steady source with volumes of 250-500 pieces and compatible gears with many size options.
Hitec’s servos in that size don’t really use their standard 24 tooth spline, so the accessories would not be compatible.
The secondary idea using the magnetic clutch and the small 9g servo seems to be best.
With the RB-DAG-94 magnetic servo kit fit the HS-322 servo ?
Unfortunately not - the spline is different.