Jack screw works on principle that thread is rotating and screws are lifting/lowering a load, whereas lead screw is used to convert rotational motion into linear motion as in 3D printers (see Figure.7). You are working in company that designs screw jack and lead screw for 3D printers and your role is to determine operating efficiency of both mechanisms and provide detailed report of your work. L ead Screw Figure.7: Screw Jack (left) and 3D printer’s lead screw (right) You have been given the following information; - Lead screw has square threads with a pitch of 2.5 mm and a mean diameter of 15 mm. The coefficient of friction is 0.32 and the lead screw is loaded at 5 kN and assume the motor torque input is 20 N.m . A screw jack has a thread with a 6. 5 mm and a mean diameter of 32 mm. The coefficient of friction is 0.21 and jack is loaded at 7 kN upward with a handle of 750 mm.
Jack screw works on principle that thread is rotating and screws are lifting/lowering a load, whereas lead screw is used to convert rotational motion into linear motion as in 3D printers (see Figure.7). You are working in company that designs screw jack and lead screw for 3D printers and your role is to determine operating efficiency of both mechanisms and provide detailed report of your work. L ead Screw Figure.7: Screw Jack (left) and 3D printer’s lead screw (right) You have been given the following information; - Lead screw has square threads with a pitch of 2.5 mm and a mean diameter of 15 mm. The coefficient of friction is 0.32 and the lead screw is loaded at 5 kN and assume the motor torque input is 20 N.m . A screw jack has a thread with a 6. 5 mm and a mean diameter of 32 mm. The coefficient of friction is 0.21 and jack is loaded at 7 kN upward with a handle of 750 mm.
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Transcribed Image Text:Problem 5:
Jack screw works on principle that thread is rotating and screws are lifting/lowering a load, whereas lead screw
is used to convert rotational motion into linear motion as in 3D printers (see Figure.7). You are working in
company that designs screw jack and lead screw for 3D printers and your role is to determine operating
efficiency of both mechanisms and provide detailed report of your work.
Lead Screw
Figure.7: Screw Jack (left) and 3D printer's lead screw (right)
You have been given the following information;
- Lead screw has square threads with a pitch of 2.5 mm and a mean diameter of 15 mm. The coefficient
of friction is 0.32 and the lead screw is loaded at 5 kN and assume the motor torque input is 20 N.m .
A screw jack has a thread with a 6. 5 mm and a mean diameter of 32 mm. The coefficient of friction is
0.21 and jack is loaded at 7 kN upward with a handle of 750 mm.
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