Diff for "CokeMachineRebuild"

Differences between revisions 37 and 38

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	Total
7	microswitches	front button switches	au.element14.com	$2.16	$15.12
20	microswitches	each slot has double microswitches, there are 10 slots, 0.15N	au.element14.com	$3.60	$72
7	5mm round white LED's	replace empty slot globes	Standard 5mm LEDs, au.element14.com	0.616	$6.16
7	resistors	empty slot LED protection
1	stripboard or veroboard	mount LED resistors
10	4 pin connectors	one for each slot actuator unit
1	9 pin connector	interface with distribution box
2	16 pin connectors	base of door connectors (left and right stack)
1	8 pin connector	base of door connector (middle stack)
1	manual drop button
1	PLC	brain	FMD88-10 starter kit, i-STK88-10, http://www.tri-plc.com/ISTK-FMD88-10.htm (including http://www.tri-plc.com/fmd88-10.htm , software, data cable)		$420
1	PLC expansion card	additional IO	EXP1616R, http://www.tri-plc.com/exp1616r.htm		$190
42m	4 core wire, 1mm minimum diameter (to carry 2A)	actuator and empty switch wiring	http://www.altronics.com.au/index.asp?area=item&id=W2341 4 core, 7 strands, 2.2A rated, $45/100m minus trade discount; Quote wanted for 4 core mains flex e.g. http://www.blackwoods.com.au/PartDetail.aspx?part_no=04418902	$0.85/m	Under $45.00
8m	9 core wire	front buttons and lights wiring	ebay.com.au 201111	$2.15/m	$17.20
	cable ties
	cable loom/heatshrink tube/electrical tape
	terminal blocks
2	galvanising paint	recoating everything	http://www.diytools.com.au/MOTOSPRAY-Silva-Gal--Pressure-Pack-400g.html	$12
3	110V fan to replace refrigeration fans
Total

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 37 as of 2011-12-01 15:13:10 → 
  Size: 4953
  Editor: NickBannon
  Comment: Altronics security wire
+   ← Revision 38 as of 2011-12-01 15:41:59 → ⇥
  Size: 5056
  Editor: NickBannon
  Comment: Mains flex?
-Deletions are marked like this.
+Additions are marked like this.
 Line 24:
-||42m||4 core wire, 1mm minimum diameter (to carry 2A) || actuator and empty switch wiring||  http://www.altronics.com.au/index.asp?area=item&id=W2341 4 core, 7 strands, 2.2A rated, $45/100m minus trade discount || $0.85/m || Under $45.00 ||
+||42m||4 core wire, 1mm minimum diameter (to carry 2A) || actuator and empty switch wiring||  http://www.altronics.com.au/index.asp?area=item&id=W2341 4 core, 7 strands, 2.2A rated, $45/100m minus trade discount; Quote wanted for 4 core mains flex e.g. http://www.blackwoods.com.au/PartDetail.aspx?part_no=04418902 || $0.85/m || Under $45.00 ||

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