TickerChooch
Makes a stepper motor drive along a track for a preprogrammed distance with pauses for given times. Speed is set in configuration. Details are displayed on an LCD panel.
By Adam Carmichael carneeki@carneeki.net For Emma's Spare Room Machine Shop missemmajade@gmail.com
State Machine
There is some state machine logic in the loop() code. The states are:
- STATE_INIT - machine is booting up
- STATE_DATA - machine is accepting data and ready to go
- STATE_RUN - machine is currently moving
- STATE_PAUSE - machine is paused between movements
While in STATE_RUN or STATE_PAUSE, if a limit switch is pressed, the machine returns to STATE_DATA and is ready for data entry.
What the LCD shows for each state:
Accepting data:
/----------------\
|D: xxxx P: xxxx|
|S: xxxx RDY|
\----------------/
Speed will have a - symbol to indicate direction is reversed if the direction
switch is set to reverse.
Running:
/----------------\
|D: xxxx P: xxx|
|S: xxxx RUN|
\----------------/
Paused
P: shows remaining time
/----------------\
|D: xxxx P: xxx|
|S: xxxx PAU|
\----------------/
D: 0 P: 0
S: 0 RDY
D: 0 P: 0
S: 0 RDY
D: 0 P: 0
Panic
When the state machine enters an unknown state
/----------------\
| PANIC! |
| :( |
\----------------/