PROGRAMMING THE E80 PLOTTER

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001600020088-7
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 3
• Document Creation Date: December 28, 2016
• Document Release Date: April 19, 2000
• Sequence Number: 88
• Publication Date: April 9, 1954
• Content Type: MEMO

Approved For W ease 2000/06/07: CIA-RDP78B 4747A001po6ip 8S-TTATOTHR
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M morand u m
STATOTHR
Memo No. 1112 DECLASSIFICATION REVIEW BY
TO: E80 File NIMA / DoD
FROM:
UBJECT: Programming the L80 Plotter
DATE: 9 April 1954 STATOTH R
1. General
The E80 Plotter is a large high peed coordinatograph having two axes of motion,
x and y, arranged as in a right handed coordinate systern. A 5 foot by 5 foot
vacuum platen holds the paper fed automatically from a roll supply and a pen
is controlled to make point,, or lines on the paper.
The position of the axes and hence of the pen is under the control of 1i Ad THR
located is the same room which in turn receives it, commands from a
Computer. For test purposes a manually entered axi'> control panel is provided.
For either operation, the basic program format i,, the same.
On this, machine the path control is incremental as opposed to absol,.:te. That
is, each incremental command tell-, the pen where to go next and there is no
memory of previous positions, and the incremental path is. the straight line;
the shortest distance from the previous point to the next one. The smallest
programmable increment is .005" and successively larger command bits are in
the progression as follows:
.005"
.010"
.020"
040"
080"
.160"
Approved For Release 2000/06/07 : CIA-RDP78BO4747AO01600020088-7
 J"000 File
Memo N April 9, 1964
Apord~A For Release 2000/06/07 : CIA-RDP78B04 7A00160002Q;g8$-7
.320"
.640"
1.280"
2.560"
Any of these individually or in combination may be used to compose the incremental
distance command. The actual orders of the bits and the command sign is shown on
Drawing No. BJ0002.
In addition to the dimensional data there ar-3 8 special commands for automatically
performing other operation.
These are also I isted on Drawing No. BJ0002 . As an
example, the following commands might be used for drawing some reference lines from
the origin. The display shown below is schematical with the least significant hit on
the right. Spaces need not be transmitted.
Command Bit
0 10
11 21
22 29
00000000000
00000000000
00001000
00000000000
00000000000
00001110
00000000000
00000000000
00100000
11111111110
00000000000
00000000
11111111110
00000000000
00000000
11111111110
00000000000
00000000
11101000110
00000000000
01000000
Explanation
Plus signs but no change in
position for either axis. Feed
paper 60".
No data command. .return pen
to tahl-- oric:rin.
No data command. Lower p._n
onto paper.
Move parallel to Y axis 5.11 5"
Same
jarne
Move parallel to Y axis 4.655"
and life pen at the end of the
travel .
The pen is now at Y=20". This is th,: sum of the four Y commands and the last Y command
was composed of the following bits: 2.560", 1.280", .640", .160'", .010", .005", plus
sign
Approved For Release 2000/06/07 : CIA-RDP78BO4747AO01600020088-7
T W T/bd
 #80 Approved For RgLease 2000/06/07 : CIA-RDP78BAr 47AO01600020088-7ril 9, 1954
Memo No. 1112 Page 3
The next motion will be in the X direction.
00000000000
00000000000
00001110
00000000000
00000000000
00100000
00000000000
00110010000
00000000
00000010000
00000000000
00000000
00000000000
00000000
00000000000
00110010000
00000000
000(X)'':10000
00000000000
00000000
0()::,i00(1 ' 0001
00000000000
00000000
x lanation
Pen to origin
Lower pen
1.000"inX
plus .040" i-: Y
minus .040" in Y
1.000"inX
plus .040" in Y
minus .040" in Y
With a repetitive- serifs of these commands, you can generate a maring with 1-ir)ch
}i::l: mar :?:; s' , i }h longer commoncj , H line, could be laid.
STATOTHR
Another copy of the enclosed drawing will he forwarded as soon as the pin assignments
are confirmed by
This drawing will then show the pin assignments.
STATOTHR
Approved For Release 2000/06/07 : CIA-RDP78BO4747AO01600020088-7