The load applied by the weight at the end of that moment arm ends up being mostly axial, not radial. You'll notice the first servo suffered a tensile failure, not a shear failure, as evidenced by it "popping" off upward. The weight at the end of the arm deflects it until the hub comes in contact with the edge of the servo. The downward force from the can gets transmitted to a much larger upward force on the shaft of the servo, aligned mostly with the axis. If the whole rig was laid down on it's side, such that gravity was acting along the same direction as the arm, then the weight of the paint cans would have acted radially on the shaft of the servo. Was really hoping to get an idea of how much axial force a standard servo is designed to handle and this had the potential to be very helpful and ended up just being misleading.
So servo blocks only work for paint cans? Just kidding- Brian has done an excellent job demonstrating the load shifting capability of servo blocks! We'll show it to our whole robotics team - thanks from the Tuxedo Pandas, FTC 4924!
Some of that comes down to what servo is installed. A ServoBlock provides assistance to the servo, but there are still forces that act on the bearings (or bushings, depending on the servo you use) within. The bearing of a ServoBlock has a basic load rating of 121 pounds-force so most of the time your limiting factors are going to be torque of the servo, the material of the spline and material of the servo case rather than the ServoBlock itself. Feel free to reach out to our Tech Team should you have any other questions tech@servocity.com.
Hi Anthony, we are using four Beam Attachment Blocks A #585403 per bracket. Please let us know if you have any other questions. www.servocity.com/beam-attachment-blocks
The load applied by the weight at the end of that moment arm ends up being mostly axial, not radial.
You'll notice the first servo suffered a tensile failure, not a shear failure, as evidenced by it "popping" off upward.
The weight at the end of the arm deflects it until the hub comes in contact with the edge of the servo. The downward force from the can gets transmitted to a much larger upward force on the shaft of the servo, aligned mostly with the axis.
If the whole rig was laid down on it's side, such that gravity was acting along the same direction as the arm, then the weight of the paint cans would have acted radially on the shaft of the servo.
Was really hoping to get an idea of how much axial force a standard servo is designed to handle and this had the potential to be very helpful and ended up just being misleading.
Hi can you provide a link to buy the paint cans?
:D
I did not know how weight of a paint can.
How much torque would it take to lift 50 pounds on a 10 inch long arm? Looking for the least expensive way to reliably do that.
50lbs, 10" away equates to 500 in-lb or 8000 oz-in.
So servo blocks only work for paint cans? Just kidding- Brian has done an excellent job demonstrating the load shifting capability of servo blocks! We'll show it to our whole robotics team - thanks from the Tuxedo Pandas, FTC 4924!
Clearly you can also use it for buckets of water, duh. :P
Could you tell me what the load rating is for these? I can't seem to find it anywhere on the site. Thanks!
Some of that comes down to what servo is installed. A ServoBlock provides assistance to the servo, but there are still forces that act on the bearings (or bushings, depending on the servo you use) within. The bearing of a ServoBlock has a basic load rating of 121 pounds-force so most of the time your limiting factors are going to be torque of the servo, the material of the spline and material of the servo case rather than the ServoBlock itself. Feel free to reach out to our Tech Team should you have any other questions tech@servocity.com.
@@ServoCity Excellent- thanks so much!
Excellent design. Nice and compact.
Thanks, Timothy!
What part are you using to attach the mini channel to the frame for the two supports?
Hi Anthony, we are using four Beam Attachment Blocks A #585403 per bracket. Please let us know if you have any other questions. www.servocity.com/beam-attachment-blocks
shiiit I WANT A SERVOBLOCK NOW!!