Diff for "CokeMachineRebuild"

Differences between revisions 16 and 17

redo all internal wiring and logic, except the refrigeration parts
make the machine more safe by doing things properly and reducing the voltage of exposed components
keep the software interface as simple or more simple than before
make the buttons on the front of the machine work for dispense
make it extensible so things can be added on
give the machine a general service where necessary (seals, rust protection, oil)

Amount	Item	Use	Model	Unit Cost
7	microswitches	front button switches
20	microswitches	each slot has double microswitches, there are 10 slots	http://au.element14.com/honeywell-s-c/v7-5f17d8/micro-switch-pin-plunger-spdt-3a/dp/1796593	$3.60
7	5mm round white LED's	replace empty slot globes
7	led mounts for empty slot display	may not be needed, depends on how we mount the LEDs
7	resistors	empty slot LED protection
1	stripboard or veroboard	mount LED resistors
10	6 pin connectors	one for each slot actuator unit
??	? pin connectors	assorted connections between cables
1	manual drop button
1	PLC	brain	FMD88-10
1	PLC expansion card	additional IO	EXP1616R
50m?	20 different coloured wires	general rewiring
	cable ties
	cable loom/heatshrink tube/electrical tape
	terminal blocks
1	can rust proofing spraypaint
1	110V fan to replace 12V case fan

empty the machine and bring it into the clubroom. This means everything won't have to be packed up at the end of the day while we're working on it
remove one of the stacks and test a slot actuator to see what it runs off. This determines what hardware we use to drive everything, so we need to know.
purchase all required hardware (PLC, wiring, connectors, switches, etc.)
write software (state machine based programming implemented in ladder logic, should be quite trivial)
wire up on the bench and test
service the machine. A can of zinc spraypaint wouldn't go astray on some of the rust spots I think. Check all the seals. Oil what needs oiling. Clean what needs cleaning.
install everything into the machine and test

-  ⇤ ← Revision 16 as of 2011-11-29 13:51:53 → 
  Size: 4279
  Editor: BobAdamson
  Comment:
+   ← Revision 17 as of 2011-11-29 13:57:28 → ⇥
  Size: 4014
  Editor: BobAdamson
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 11:
-||Amount||Item||Use||Model||Cost||
+||Amount||Item||Use||Model||Unit Cost||
 Line 13:
-||20||microswitches||each slot has double microswitches, there are 10 slots|| || ||
+||20||microswitches||each slot has double microswitches, there are 10 slots|| http://au.element14.com/honeywell-s-c/v7-5f17d8/micro-switch-pin-plunger-spdt-3a/dp/1796593 || $3.60 ||
 Line 30:
- . http://au.element14.com/honeywell-s-c/v7-5f17d8/micro-switch-pin-plunger-spdt-3a/dp/1796593 (low force microswitches for empty detection)
 . http://au.element14.com/omron-electronic-components/vx5-1a2/microswitch-v3-plunger/dp/673626 (alternative)
 . http://au.element14.com/cherry/kwgb-qaca/micro-switch-button-spdt-5a-250v/dp/4549259 (50gf, may be too high)

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