Rotary Index Table app.

gpdc

Member
Join Date
Aug 2007
Location
Phoenix New York
Posts
1
Good morning all!
First time poster, long time reader/member,low to medium programing experience...
My problem is programing a simple auto indexing CCW rotation index table (has operator input for cycle start) for Mitsi control (Fx1N).....
(10) stations as follows:
#1 oper load
#2 empty
#3 Photoeye sees (or not sees) part
#4 First action station
#5 Second action station
#6 Third action station
#7 empty
#8 Action station (finished part pick off)
#9 & #10 empty
My ONLY inputs (customer requirement) are part present @ Sta #3, which is my X7, and "table in position", my X26....
Every part that's seen @ Sta #3 must be acted on @ Sta. #4 and then either of Sta. 5 or 6 (part dependant, operator switches between X22 and X23)...Sta. 8 (the pick off) can operate with each index, but sure would look better if it only cycled when a part was present there.
When Sta #3 has seen a part and Sta. 4 has acted on it, Sta 4 (or 5) MUST act on it.
In a perfect world, somebody could/would direct me to existing ladder that incorporated a shift register of some sort, showing me where I could/should start with this.
If anybody's got anything for us on this, I sure would be greatfull...thanks much...GPDC
 
you only need to track few stations and only need few bits.
i would just use BMOV...

lets see if we can use nibble:

bit0 - part present (stored from X7, if not present, Station 4 doesn't do anything)
Bit1 - type bit (from X22)
Bit2 - type bit (from X23)
Bit3 - spare (whatever you want it to be)

So the whole 10 station table (can be cut down, this is just an example)
would look like:
M100 Stn1 part present (from X7)
M101 Stn1 type bit (from X22)
M102 Stn1 type bit (from X23)
M103 Stn1 not used
M104 Stn2 part present (from X7)
M105 Stn2 type bit (from X22)
M106 Stn2 type bit (from X23)
M107 Stn2 not used
M108 Stn3 part present (from X7)
M109 Stn3 type bit (from X22)
M110 Stn3 type bit (from X23)
M111 Stn3 not used
M112 Stn4 part present (from X7)
M113 Stn4 type bit (from X22)
M114 Stn4 type bit (from X23)
M115 Stn4 not used
M116 Stn5 part present (from X7)
M117 Stn5 type bit (from X22)
M118 Stn5 type bit (from X23)
M119 Stn5 not used
M120 Stn6 part present (from X7)
M121 Stn6 type bit (from X22)
M122 Stn6 type bit (from X23)
M123 Stn6 not used
M124 Stn7 part present (from X7)
M125 Stn7 type bit (from X22)
M126 Stn7 type bit (from X23)
M127 Stn7 not used
M128 Stn8 part present (from X7)
M129 Stn8 type bit (from X22)
M130 Stn8 type bit (from X23)
M131 Stn8 not used
M132 Stn9 part present (from X7)
M133 Stn9 type bit (from X22)
M134 Stn9 type bit (from X23)
M135 Stn9 not used
M136 Stn10 part present (from X7)
M137 Stn10 type bit (from X22)
M138 Stn10 type bit (from X23)
M139 Stn10 not used

So when table is in position, just index the list (copy stn1-9 to stn 2-10 and erase stn1).
It could look something like this (not tested but this is your job anyway).
You may not need all 10 stations, you may need few more bits than those three,
this is just one way to do it...


bmov.gif


Any sensor status in injected at the station where the sensor is installed. For example
if the part type is determined at load station (Stn1) then you will need to use proper bits
for that station (check list, just replace M109 and M110 with M101 and M102 etc.)
 
Last edited:

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