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  1. Enrico Urru

    Torque calculation for bevel gear mechanism

    Thank you all for the help! @3DDave this is also my understanding of the system. @Doug Hunter , @mfgenggear it seems it is becoming too complex for what my initial plan was. Do you have something I can refer to? at least for the FBDs and TFs? Or a software I can use to calculate the torque?
  2. Enrico Urru

    Torque calculation for bevel gear mechanism

    Thank you! I'm trying to build a differential wrist mechanism used in robotic arms. My intention is to spin the driven gear around it's own axis and around the pinion gears axis. I assume that if the driven gear has a weight on it then it will require more torque to rotate around the pinion axis...
  3. Enrico Urru

    Torque calculation for bevel gear mechanism

    I hope this picture can clarify. Imagine the gears are supported on each end by a bearing on the holes on the frame. The t link in the middle helps supporting the structure and has bearings inside, also the two pinion gears can rotate indipendently from each other. When the pinion gears rotate...
  4. Enrico Urru

    Torque calculation for bevel gear mechanism

    I am trying to determine the torque required by the two pinion bevel gears to move the bigger bevel gear (when the pinion gears rotate in the same direction), like in a differential mechanism. The driven bevel gear has a load on its end. Being the driven bevel gear horizontal it exerts the...
  5. Enrico Urru

    Thickness GD&T

    Thank you for all the comments. It's super helpful
  6. Enrico Urru

    Thickness GD&T

    Thank you for your help. There is no particular standards I am following. The stock used is not specified. I wanted a tolerance of +-0.05mm
  7. Enrico Urru

    Thickness GD&T

    The design intent is to fasten 2 extra components to the threaded holes. They need to be perpendicular to the top and bottom faces of the component. https://files.engineering.com/getfile.aspx?folder=55678d71-1b1c-40f4-8665-81183db92e2e&file=Capture3.PNG
  8. Enrico Urru

    Thickness GD&T

    Hi Greenimi, Thank you for your feedback. What is wrong about datum B?
  9. Enrico Urru

    Thickness GD&T

    Hi everyone, What control should I add to have a thickness of 4mm? Is the flatness control good enough to keep it close to 4 mm?https://files.engineering.com/getfile.aspx?folder=175bd768-c2de-4a74-9fae-0797d53542b4&file=Capture2.png
  10. Enrico Urru

    Power transmission with timing belt

    Hi everyone, How do you determine the transmitted torque in a 2 pulley system with timing belt? I know the torque of the motor and the speed of the 2 pulleys.
  11. Enrico Urru

    Timing belt selection

    Thank you for the advice.
  12. Enrico Urru

    Timing belt selection

    Hi everyone, I am trying to design a 2 pulley system with a timing belt. The small pulley will be driven by a Nema 17 stepper motor, 0.4 Nm, speed 1000 rpm. The largest pulley will be attached to a lead screw for driving a load and rotate at a speed of 250 rpm. - I determined the power of...
  13. Enrico Urru

    Perpendicularity

    Burunduk, I got confused, I thought that it was enough to define a basic angular dimension. Thank you again for the help. https://files.engineering.com/getfile.aspx?folder=7716ebec-3e34-405d-9df5-175b6e5d8a95&file=Technical_Drawing_2.PNG
  14. Enrico Urru

    Perpendicularity

    I mistaken the two surfaces, I should have put it on the surface where the hole is located. I made all the changes that you suggested. Thank you for your help. https://files.engineering.com/getfile.aspx?folder=14e7b7b6-2c90-4746-ba03-f198d8b219ca&file=Technical_Drawing_1.PNG
  15. Enrico Urru

    Perpendicularity

    Hi Dave, Yes I see, I mistakened the surface where the datum A was referenced. The drawing as it is, shows that edge to be part only of datum B. Thank you.
  16. Enrico Urru

    Perpendicularity

    Thank you so much for your help!
  17. Enrico Urru

    Perpendicularity

    Hi Dave, Thank you for the reply. ISO standards. What surfaces are you referring to? I used datum features C and B to locate the hole. How should I locate the feature in the best way?
  18. Enrico Urru

    Perpendicularity

    Thank you for the feedback. I have made changes to the drawing in order to fully constrain the location of the hole. By using a position control frame, am I still able to obtain perpendicularity? Is there anything I should change in the drawing? See update. Thank you...
  19. Enrico Urru

    Perpendicularity

    Hi everyone, I am drafting a drawing of a toggle lever with a threaded hole for an insert. I set a control frame to control the perpendicularity of the hole with respect to datum A. Should the dimensions for locating the threaded hole be basic dimensions? I am referring to 20 and 12, see the...

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