Eagle EGP-1 Installation and Operation Manual

				the empty core onto the
				take-up shaft. (See Figure23)
				Align the two notches in the
				core with thetabs on the
				lowertake-up spool.
				7. Slide a fresh roll of paperin
				position on the supplyside
			•	shafton the right side ofthe
		•		platen assembly.The paper
				mustspooloff the bottomof
				the roll. (SeeFigure 24)
Figure 18	Figure 19			8. Draw the end ofthe paper
	— the stylus may be			across the face of the platen,
				around thefriction roller, over
	damaged. (See Figurel9.)			thetake-upcore, and tape it
	SPECIALNOTE:The stylus			squarely to the take-up core.
	may be damaged if the platen			(SeeFigure25) Small pieces
	assembly is pulleddown un-			of tape may be storedinside
	less the stylushas been			the housing forthis purpose.
	moved to the backside of the			Closethe top ofthe platen
	platen.			assembly by pressing the two
	4. Pull out and down on the tab			tabs togetheron the paper
	atthe top centerofthe platen			retainer and returning the re-
	assembly to expose the pa-			tainer backto the operating
	per spools. (See Figure2o.)			position. (SeeFigure26)
				9. Turn the small knobatthe
	5. To remove the full take-uproll
				upperleft hand side of the
	and the empty supply spool,			platen assembly to put a
	press the two metal tabs to-			small amount oftensionon
	getheron the top of the platen			the paper. It should be snug
	assembly, and pull out and			against the platen.(Figure 27)
	down on the paper retainer.			10. Push the platen assembly
	(See Figure 21.) Thefull take-
	up roll can now be easilly re-			backto its operating position.
	moved fromthe paper core			Be sure it engages the catch
	shafts. (See Figure 22.)			inside the top of the case.
	6. Pull the emptysupply core			(See Figure2O)
				11. Closethe frontofthe case.
	fromthe right side in the			Latch both catcheson thetop
	same manner. Install			ofthe case.
		F		12. Turn the unit on. Movethe
				ChartSpeed knobfully clock-
	Notice—Use only genuine
				wise.Watch the paperlong
	Eagle EGP-1 graph paper			enough to be sure it is mov-
	Substitute paper does not give			ing smoothly and evenly
				across the platen. If the pa-
	satisfactory performance in			per flutters or beginsto run
Figure 21	Eaglegraph recorders.			"uphill", repeat step 8.	PdfCompresso
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of day. be two

of a warm and cool

STYLUS REPLACEMENT

CAUTION — High voltage is present in the electronic section

when the unit isturned on.'

1. TURN THE UNIT OFF.

2. Release both catcheson the

top of the case. Pull out and

down on thetop of the case frontto expose the stylus belt.

(SeeFigurel8.)

3. Thestylusbelt ridesover two wheels located at the right

	edge ofthe platen assembly.
	Move the front of the belt
	DOWNto position the stylus at
	the centerofthe platen.
	4. Hold the stylus belt stationary
	with one finger, and remove
	the old stylusby starting at its
	left edge and moving it out
	from underthe tabs on the sty-
	lusholder.
	5. Before installing the new sty-
	lus, be sure it is bent properly
	by camparing it to Figure 28.
	6. Refer to			be sure
		Figure29to
	the new stylus is positioned
	correctly underthe tabs on the
	holder. Be sure it moves freely
	in thetwo slots. If not, bend
	the stylus away fromthe edge
	it is rubbing on until it does
	move freely.
	7. Afterinstalling, if the stylus
	won't		all, the	way	down
	print
	the paperas shown in Fig-
	ure3O,bend the right leg down
	so that more pressure is ex-
	ertedagainstthe stainless
	steel plate. If it still does not
	print all the way, bend the left
	downmore (butnot so far
	thatleg it digs into the paper).
	8. Close the frontof the case.
Figure 27	Latch both catches on the top
	ofthe case.

Figure 17

EAGLE is that it can record individual fish with a characteristic

archedmarkthat separates them

fromtheir stationary surround- ings.The reason forthis is shown

below. The distance to afish when it moves into the sonar's coneof sound is shown as "A" in

Figurel6. When the fish has moved to the centerof the cone,

thedistanceto it will be shorter,

(line "B"), and as it moves out of thecone,the distance will in-

crease again as shown in line "C". If a partial arch occurs most

of the time on your unit (the mark curves up, but does not curve

backdownor vice-versa), it is because the transducer is not aimed

straight down.

Sharp, well-defined signatures will occurmostoften whenthe

Sensitivity knobis set atthe ¾

point, or higher. (See"A", Fig-

urel7). Remember, too, that there mustbe some movement be-

tweenthe fish and boatto de- velopthe arched mark.

Thermoclines

Thetemperature ofwaterin the lake is seldomconstant from top

to bottom. Layers of different temperatures form,and thejunction

layerof water is called a thermocline. Thedepth

and thicknessofthe thermocline

can vary with the season or time

In deep lakes there may or more, at different

depths. Thermoclines are impor- tant to thefisherman because

they are areaswhich fish are ac- tive. Manytimes baitfish will be

above the thermocline whilelar-

ger game fish suspend just below it. See "B", Figure 17.

Your EAGLE Mach 1 can detect this invisiblelayerin thewater,

butthe Sensitivity knob will probably haveto be set at the 1/2

point, or higher.

PAPER LOADING

CAUTION — High voltage is pre- sent in the electronicsection

when the unit is turned on.

1.TURNTHE UNIT OFF.

2.Release both catches on the

top of the case. Pull out and down on the top ofthe case front to expose the platen as- sembly. (See Figurel8.)

3.Movethe stylus belt DOWN, to positionthe marking stylus on the backside of the pla- ten. NEVER move the belt up

9

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Figure 28

Figure 29

Figure 14		ZOoM "OFF"	Figure 15	ZOOM"ON"
ZERO ADJUST			MARKER
Occasionally,whenchanging the			Pressing the Marker button
stylus or stylus belt, the zero			causesa verticallineto be
does not printat the sameplace			printedon the paper. Hold the
nearthe top of the chart paper.			Markerbutton down and the unit
By rotating the BOTTOM ZOOM			will print the verticallinefor as
control counter-clockwise the			long as the buttonis held down.
zero line can be moved towards			ENDOF PAPER MARKER
the top ofthe chart paper, clock-
wise rotation moves the zero line			The graph paperused in the		at
towards the bottom of the paper.			MACH 1 has a red line	printed
Thecontrol has been designed			the bottom of the paperto signify
so that even ifthe record goes off			whenthere is only2 to 3 feet of
the bottom of the paper, it- can			paper remaining.		STYLUS BELT REPLACEMENT
still be adjusted to print on the			IV HOW TO READ GRAPHS
					CAUTION —
paper.	The ZERO					High voltage is pre-
		ADJUSTcontrol	"Arched Signatures"
will function if the BOTTOM					sent in the electronic section
ZOOM feature is on or off.			A remarkable advantage ofthe		when the unit is turned on,
					1. TURN THE UNIT OFF.
					2. Release both catcheson the
					top ofthe case. Pull out and
					down on the top of the case
					front and the platen to expose
					the stylus belt.
					3. The stylus belt rides over two
					wheels located at the right
					edge ofthe platen assembly.		-I
					Refer to Figure 1 on page 2.		Figure 31
					Move the frontofthe belt
					DOWN to position .the stylusat		to the left while pushing the
					the centerofthe platen.		belt off the wheelswith the
					4. Grasp the belt at the stylus		otherforefinger. (See
			Figure 16		holderwith thethumb and		Figure31.)
					forefinger and move itgently		5. Position the new belt on the
		8

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wheels by reversing the proce- dure used to removethe old

one. BE SUREthe fingersof the new stylusare pointed UP.

6.Closethe front ofthe case.

Latchboth catches atthe top ofthe unit.

MAINTENANCE

NOTE: The stylus may be damaged if it is in front of the pla- ten whenthe platen assemblyis

pulleddown. Alwaysmove the stylusto the back side of the pla-

ten when changing the paper rolls. Remember to movethe belt

downto remove the stylus.

Black carbondust is created dur-

ing the recording process. Use a soft, oil-freerag to cleanthe

viewing doorand metal platenbe- hind the paper. Low pressure compressed air may be usedto blow dust out ofthe case and

away from moving parts ifthe air is dry and free of oil.

Aftereveryfive rolls of paper, the stylus belt and the wheels it rides on should be wiped cleanwith a soft, rag moistened with alcoholto

remove carbon dust. Strongsol- ventsor abrasive cleaners should

not be used.

All mechanical connections

shouldbe checked periodically to be sure they haven'tworked

loose.

HIGH VOLTAGEis presentin the transmitter sectionwhenthe unit

is ON. No attempt shouldbe made by any unauthorized per-

son to modifyor repairthe elec- tronicsection.

All electrical connections should

be checked periodically and cleaned as necessary.

Theface ofthe transducer, if mounted on the transomshould

be washed periodically with mild soapy waterto remove any ac-

cumulated rod grime or oily film.

This is essential to have good contact between the transducer

and the water.

Periodically, the rubber roller on the paperdrive should be cleaned with a clothdampened

with alcohol, to improvethe fric- tion on the driveshaft.

DO SECTION

Do carry a spare fuse, stylUs belt, and roll of paper.

Do use the empty cardboardcore from the last roll of paperon the

take-up post.

Do keepthe recorded graphsfor future reference.

Do cleanthe stylusbelt, wheels, and the rubber roller afterevery

five rolls of paper.

DON'TSECTION

DON'TOPEN THECASEWHEN

THE UNIT IS ON.

Don't	the	platen assembly
pull

downwhenthe stylus is atthe front.

Don'tstore any objectsinside the caseor behind the viewing win-

dow. (Except for small pieces of tape.)

Don't	to	tape	the	to
forget				paper

Q p.r

r

I

Figure 11 GRAYLINE "OFF"

per speed may also be slowed whennot looking for fish or to

simplyconserve paper.

GRAYLINE CONTROL

The GRAYLINE function can be usedto outline the bottom con-

tourwhich might otherwise be hidden beneath trees and brush;

it can also give clues to the com- position ofthe bottom. A hard

bottom returns a very strong sig-

nal causing a wide gray line. A soft, muddy, or weedy bottom re-

turns a weaker signal which is emphasized with a narrow gray

line. Do not advance the control too far or it will gray line on the

targetcompletely, showing no black, which makes thetarget dif- ficult to see.

There are 12 ranges:

0-10 feet

0-20

0-40

0-60

0-80

0-100

0-140

0-200

0-300

0-400

0-600

Figure 13 0-1000

Figure 12

GRAYLINE "ON"

RANGE

This control determines the depth scale displayed on the chart paper. (See Figure 13)

BOTtOM ZOOM

By pulling out the knob, the fea- ture allows you to "Zoom in" on

the lowerhalf ofthe rangebeing displayed on the graph. In other

words, with the Range control set to the 60 foot range, and the Bottom Zoomcontrol pushed in

(OFF), the scale printed on the chart paperwill be 0 to 60 feet.

(SeeFigure 14.) With the Bottom

Zoomcontrol pulled out (ON), the scale will be 30 to 60 feet.

This allows you to double the size

of anytargetor feature in the lowerhalf of any depth range.

(Figure 15.)

ZERO ADJUST

@ERANGE
IOU		—p	-.	.	140
60					—2O0
60		—....			&___300
40		---e
20	—				r—60O
10					—1000
		GRAYLINER
		'<r_PAPERSPEED
		0	4	4

14 7

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