Branches
Dynamics
branch of applied mathematics concerned withย โthe study of forces and their effect on motion
- for example: Hapkit, paper planes (no quasi-infinite powers)
Statics
just about forces (in equilibrium) but without motion
- for example: bridges and buildings
Kinematics
just about motion but ignoring forces
- model of animal running rather than using forces it uses quasi-infinite power
Drive mechanisms
Slack / Backlash
ability of the driven gear to move without applying a force to the driving gearโ
- gears couple two rotating elements, allowing the transmission of torque
- gears are subject to slack
Friction drive
mechanism that converts rotary motionโ into linear motion and vice versa
- it is slack-free
- only works reliably if (rubberized and) pushed together with a high forceโ
- thus requires a massive spring to push rollers togetherโ
- thus requires ball bearings reasonably big techโ
Capstan and bowstring
mechanism that converts rotary motion into linear motion and vice versaโ
- capstan = a reel or pulley (a wheel with a grooved rim) around which the bowstring is wound several turnsโ
- traction of capstan increases exponentially with the number of turns
Bug
Short circuit checking
direct drive high currents a short can kill the board (and more)
- set multimeter to measure resistance