Post#6 – Twin-clutching
TECHNIC Gear 24 Tooth Clutch (part 60c01) [as shown in picture] often used together with PF motors. Clutch is used to prevent the PF motors from overloading.
Building a large and heavy motorized MOC LEGO Technic model requires appropriate torque balance between the motors and loads.
Often clutch slips when the load is too heavy. Hence, the “Twin-clutching” technique is applied.
Clutched gear has the maximum torque limit of
5 Ncm. Applying 2 clutches on the same shaft will result in
10 Ncm torque limit. Note that any number of clutches can be applied to the same shaft as long as does not exceed the torque limit of the driving motor.
The XL motor delivers a maximum torque of
40 Ncm which means applying
10 Ncm twin-clutching only uses
25% of the maximum torque of the XL motor. (Can be expandable up to 8 clutches assembly)
The same formula applies to the M motor. The M motor delivers a maximum torque of
12 Ncm. Applying
10 Ncm twin-clutching will use
83% of the maximum torque of the M motor.
Twin-clutching for the boom motion
Twin-clutching for the stick motion
More detail explanation on clutched gear in this link:
http://www.technicbricks.com/2008/02/tbs-technugets-01-inside-technic-clutch.html
