1200 lbs
Air blown over water-cooling condensers and throughout unit
The High-Speed Printer consists of four major parts: Uniservo, Memory, Control and Printer units. The complete equipment is shown in Figure 1-1.
a. UNISERVO. - The Uniservo (or Tape reader) ~eads the information sto~d
on magnetic tape by the Central Computer. This information is channeled through t"he control unit to the Memory unit, where it is stored until after it is
printed-out by the Printer unit. The Uniservo reads the tape one blockette at a time. During reading time, tape moves over the Read Head at 100 inches per second. The tape is brought from rest to the reading speed of 100 inches per second within five milliseconds. Signals from the Control unit govern the starting and stopping of the tape before and after each blockette.
b. CONTROL. - The Control unit contains the main power supply, together with most of the control and checking circuitry. The Test Control panel lo-cated on the Control unit contains switches and indicators used in testing and maintaining the Printer, and in directing the sequence and mQde of operation of the Printer.
c. MEMORY. - Information read from the tape by the Uniservo is stored in the Memory unit until completion of the printing operation. Included in the Memory unit are the memory addressing circuits, output circuits, special func-tion circuits, plugboard, and plugboard relays.
d. PRINTER. - The Printer unit contains all the mechanical assemblies used in the ~rinting operation. These assemblies include the Print Head and type-wheels which do the actual printing, and the paper and ribbon feed assemblies.
The Supervisory Control panel on the Printer unit contains the switches and
ind~cators used in normal Printer operation.
Basic operation of the Printer unit involves the sY,nchronized operation of the following mechanical assemblies:
The PRINT HEAD (Figure 1-2) contains 130 hammer-actuatorassembliest one for each print location. The actuator forcefully moves the hammer toward the associated typewheel at a precise instant selected by the electronic circuitry.
The TYPEWHEEL SHAFT ASSEMBLY (Figure 1-3) contains 65 double ... Qolumned typewheels and a Code Wheel with three independent polished optical facets.
Each typewheel has two separate 51-character columns of type around the circum-ference. Opposite each column is one hammer-actuator assembly on the Print Head. The 65 typewheels print a 130-character line of print, with each type-wheel printing in two adjacent print locations. The Code Wheel (Figure 1-3) establishes synchronization between the rotating typewheels and the character-selection circuits. The typewheel shaft is housed in a motor-driven carriage assembly (Figure 1-2) which moves in or out of printing position according to the setting of the CARRIAGE IN-CARRIAGE OUT switch on the Supervisory Control panel.
PX 616 4
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1 PrJnter Head Cover Plale 2 .. Actuator Mounting Channel 3A Hanner Nount .. Lower 38.. Hanner Nount -Upper 4 HaJlllDerJ
5A HalllJle r Gu ides .. Lowe r 56.. Haaner GuJdes .. Upper b HaIDer f\eturn Spri ng 7 Actuator Mounting Screws 8 .. Actuator Stop Screw$
9 .. Actullor Stop Backing Spring 10 .. Lett L-Cr.ee End Pille 11 .. Eccent ric Shaft Knob 12 .. Fo .... Register Slide, Left 13 Reol"er Slide Ways 14 for. ~ister Slide Stop.
Lower Actuating Screw 15 .. Actuating Screw Bracket 16 .. Lever Actuating Pins 17 .. for. Register 51 ide Stop.
Upper Actuating Screw t8 for. R~hter Slide Operlting
Crank
19 SlJde Control Worm 20 Sllde Wor. Gear 21 .. Slide Screw Thrust Coll.r 22 Slide Cont rol Screw 23 Thus< Block 24 InterceptoT Lever 25 .. Paper Lead-oCC Hood 26 Cross Shat<
27 Hodoontal Dust Shield 26 Vertical Dust Shield 2Q Tractor Shift 30 Tractor Guide Rod 31 Tractor ChainS 32 .. Tractor Guide Collar 33 Tractor Drive Collet 34 Collet Location Clamp Screw, 35 Tractor Guide Set Screw 36 Tractor Idler Sprocket 37 Paper ke\aining Gates 38 Limit -switch Mounting Plates 39 Truerse U • .1t -switches 40 Traverse Pinion
Figure 1-2. Print Head Assembly PX 616
41 - Carriage LI.lt-.wltch Trippers 42 ... Trav., .. hick SprhOI 43 - E . . ent ric Shott Eccentric.
44 ... Trlve"e Rack.
45 - T-trl" AdJu.tlng Screw.
46 - Rack Supports
47 .. Cerrhge "Out" Stop Screw 48 Carriage "Out" Stop Block 49 ... Tnven. Bin
50 .. T-tr . . . Mo""ting Pitt.
51 - Pillow Block Atuch . . nt Screws 52 Edg.. oC Cut -out In 65 53 - Hight Pillow Block 54 - Upper Ribbon Guide 55 - Eocent ric Shltt 56 - Plexlgll .. Vllor S7 .. Slek-slop Brushe.
58 Bru.h CI •• p Screws
59 Cap Screw Cor Puck Driving Sle . . e 60 .. Wuher lor Puck Drhing Sleeye b} ... Puck DrivinG Sleeve
62 - Boorl ng Retol nl ng HI ng
63 Lett Pillow Block 64 Typewheel Retolnlng Spring' 65 Typewheel Sp.clng Spring' 66 Cede Whe.1
67 T1.lng find AdJ u,",ont Screw 68 .. Len.
69 - Code Wh.el H.u.lng 70 - Photocoll Shutter Slid ..
71 - L . . p
72 - Slid Ing Dr . . Guido Roll 73 - Bru.h Holder Block 74 BrYlh Actuating Liver 7S .. Bru.h Act"lting Link 76 BruJh Holder Stop Screw 77 .. Chltch CO_ulltor Mitrors 78 fono fltglltor Slide, hlght 79 - Clutch Optlc.1 Sylt •• Cyllndrlc.1
Len.
80 - Clutch Output Shott Exten,lon 81 .. LAap Socket Set Screw 82 - Clutch Optlc.l Syste. Lomp' B3 - L.mp Soc keto
Figure 1-3. Typewheel Shaft Assembly
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64 - Aclualor Return Sprlnv 1)5
85 - Brush ACluating Solenoid qb 8& - ClulCh M.gnel CIa.p Ring 97 87 CIUlCh Coj I and Maon'l "sseably 90 88 - Clutch "rallure and Thlable ASJelibly qq
89 ClulCh Drive Bell 100
90 - Clutch Driving P\llley. Motonhafl 101
eH ClulCh Driven Pulley 102
92 Clutch I:.nd Platt.' 103
q3 Clutch SelL Tl.'nsionlng Idler 104 94 - Clulch Cia"" Ring Screw 105
Brake Opent ing Sleeve Clutch Optic~.1 Sylle. Pholocell Clutch Opllcal Syste. Photocell lIouslng Clutch Optical SYSLe. Chiane), Clutch Opt tea 1 S)'llca Silt Paper Loop Oru.
Paper Loop Brushes Tractor Driving Pinion Clutch Shaft Outboard Bearino Tractor Shafl Driven Gear Paper Loop Sliding Oru.
(Sec Figures 1-2 and 1-3 tor other nll-oul n"aben,)
Figure 1-4. Paper Feed and Optical System
PX 616
The RIBBON FEED ASSEMBLY (Figure 1-2) controls feed of the ribbon past the Print Head. The ribbon is located between the typewheels and the paper; when a hammer from the Print Head strikes the paper, it forces the paper against the ribbon and typewheel, imprinting a character on the paper. Rate of ribbon feed is determined by printing speed, since the typewheel shaft furnishes the ribbon feed driving power. The direction of ribbon feed is opposite to the direction of rotation of the typewheel; the ribbon tends to clean the typewheel
characters as they pass.
The PAPER DRIVE ASSEMBLY (Figure 1-4) contains the mechanism for advancing the paper. ~he main drive motor supplies paper-feed power through a magnetic clutch and brake assembly t~ the tractor d~ive assembly (Figure 1-2), which in turn transports the paper past the Print Head. The paper feed commutator system (Figure 1-4) controls'operation of the clutch and brake assembly to produce paper feed in single~, double-, or t:riple-space increments. Paper may be "fast-fed" over areas where printing is not desired. Even during a Fast-Feed operation, however, paper always moves an exact multiple of the selected
line spacing. Paper advances at a rate of 22 inches per second regard"iess of
the distance moved. .
The PAPER LOOP ASSEMBLY (Figure' 1-4) contains a continuous paper loop which advances in synchronism with the paper. The loop may be any length between 66 and 132 lines, depending on the length of the p~per form being used for print-ing. The paper loop is divided vertically into twelve channels and horizon-tally into print lines. Each channel controls a specific machine function;
a hole punched in a channel at a print line initiates the machine function con-trolled by that channel. Paper loop Channel.7 functions as a "Stop Homepaper"
command. Channels 8 through 12 are not used. The remaining Channels (1 through 6) are described in Section 2~ paragraph 4.d.