Tray Rocker Mounting and Operating Instructions

Your tray agitation system is warranted for three years and it is designed to give you many
years of trouble free service.

The Edwards Tray Agitation System or tray rocker consists of three assemblies.  The
Rocker Platform has three sections, which support your clearing bath trays.  The Control
Arm assembly connects the rocker platform to the Control Unit.  The Control Unit mounts
on a wall behind your sink.


1.  Connect the three rocker platforms with the nylon screws and thumb-nuts.  Match up
 numbers 0-0 or 8-8, or how ever the sides are stamped on the sides of the tray to the corresponding
holes.  The center tray platform should have the control arm bracket with a ball-joint screw on the
front edge, when youcomplete your assembly.

2.  Place the assembled platforms in your sink, at the location you plan to use the tray
rocker system.  Control Arm bracket with ball-joint screw, should be towards the front of your sink.
The back edge of the platform should be a minimum of 2-1/2" to a
maximum of 7-1/2" from the wall where the Control Unit mounts.

At the location of the ball-joint screw, measure 23" vertically from the bottom of your sink,
and mark this point on the wall (this will be the top edge of the Control Unit mounting
board).  From this mark, measure 4-1/2" straight across to the right, and draw a 2 or 3" line
straight down (this is the location of the right edge of the  Control  Unit mounting board).

3.  Place the right edge of the Control Unit mounting board on 2-3" vertical line and the
top edge on the 23" mark, level the unit and mark the five (5) mounting holes with
the(special) nail provided.  Assistance may be required to hold the unit level while the
location are marked.

4.  For sheet rock walls, use the anchors provided by simply screwing in the anchors until
flush, at each mark.  If a stud is encountered, remove the anchor and just use one of the
screws provided.

5. It is important that the Control Unit be firmly and securely attached to a fixed vertical
surface.  Alll five (5) mounting locations are necessary.  Failure to properly and securely
attach Control Unit could cause severe personal injury, if the unit were to pull or fall from
the wall, and splash the clearing bath acids on you.

6. Before attaching the Control Unit  to the wall, open the hinged door on the right side of
the unit .  Attach the Control Arm at the quick-disconnect ball-joint; a slight twisting and
pushing force is requried.  Next, screw the Control Unit to the wall with
the Control Arm  hanging down.  Assistance may be required.

7.  Loosen the three (3) slotted set screws in the control arm.   Snap on the brown plastic
snap-on ball socket on ther center tray.   Note:  Platform can be easily unattached for
cleaning sink or using sink for other purposes.

8.  Plug the unit into an electrical outlet and check the GFIC (Ground Fault Interrupt Circuit
outlet) before turning on the switch.  Push in the red or reset button until you feel a click
(if it has been tripped and is sticking out slightly).  Test the GFIC weekly by pushing the
test button and resetting with the red or reset button.  If you can reset with the red or
reset button, then the GFIC will protect you from electrical shock when using your tray

9.  Push both rocker switches to the up position (white dots).  The motor should run
continuously and there should be some movement of the control arm.  Carefully open the
side door on the Control Unit, being careful not to put your hand or fingers into the
unit, to observe the position of the ball-joint screw. Jog the unit with the left rocker switch,
until you get the screw to stop in the horizontal position or the 3 or 9 o'clock positions.
This may take several attempts.

10. Rotate the tray platform so that it is horizontal position without any tilt, check both ball-
joints to make certain they are not in a bind and are free to rotate, then tighten the three
slotted set screws in the control arm.  Do not over tighten the slotted-set screws or the
plastic treads will strip.  Just snug them up firmly, the cupped point on the set screws will
grip the stainless rod.  Check the rocker for uniform rocking front-to-back, and adjust the
set screws as necessary to get an even rock.  Now you are ready to rock.

General Information:

The rocking motion of the tray platform sends a small wave over the surface of the clearing
solutions.  As this wave travel across your print, it produces a shearing action which
pushes the salts away from the prints surface and pulls fresh solution behind it.  This wave
is like the smaller second wave that follows the first wave, we see along the beach.
Left Rocker Switch Right Rocker Switch
Up = "On"  Up = "Continuous Rocking"
Down = "Off" Down = "Intermittent Rocking"
Time Delay Between Rocks

Rotating Knob thru the 12 clock dial positions

   1:00 =   ~2 Seconds Between Rocks
    4:00 = ~15 Seconds Between Rocks
     8:00 = Continuous Rocking

Most printers seem to operate their units between settings 3-6 seconds for the intermittent rocking

You will have to work with the amount of solution in the tray and the timing to get the best
results without splashing or damaging prints.  Use a set of practice prints to set-up your
optimum conditions.

Some printers operate on "Continuous" for the first 2-5 minutes when they put a new print
in the first clearing bath, then switch to the " intermittent rocking motion".

A lab timer can be plugged into the GFIC outlet on the left hand side of the Control Unit.
Maximum outlet power is 125 VAC at 5 AMPS.

Do Not block the air cooling holes along the back edge on the top of the Control Unit.

The cam located in the Control Unit has three (3) positions to control the length of stroke,
but your unit has been set for your tray size,  and should not require changing.  If it is
necessary to adjust the length of stroke, unplug the "Control Unit" from the power
source before opening the right side access door, and remove the quick-disconnect
ball-joint.  To change the position the ball screw, you must hold the cam body with channel
lock pliers, while rotating the ball screw CCW (to remove) with a small wrench.  Grasp the
ball screw firmly as the treads are coated with vibration resistant compound.  If you have
large fingers and/or hands, you may have to remove the Control Unit from the wall,
because of the limited space.

Larger trays will require the longer stroke.  Setting a longer stroke with small (8X10) trays,
produces too much agitation and shorter stroke with larger trays will not produce the
traveling wave.

If you want to start processing larger prints, you do not need to buy a new
unit.  You simply buy new rocker platforms for your new tray size. You can
contact me for a quote.

Keep the lower snap-on ball joint screw coated with silicone grease, as this part is not
stainless steel and it tends to rust slightly.  This part is not available in stainless steel, but
when it I find a source I will send you one at no charge.

With the repeated rocking motion, the tray platform will tend to "walk" or rotate
slightly about the control arm pivot point .  Most people do not notice this phenomenon,
since the sink walls keeps it in check it.  Some printers put a graduated cylinder or short
piece of PVC pipe at the top or bottom edge of the tray platform, to keep it in check.

Contact me at 512-267-4274 if you have any questions or you have problems with
your process trays fitting the rocker platform properly.  The best time to catch me
is after 7:00 p.m. CST..

Keep on Rocking.....Happy Printing......Enjoy.  You will wonder how you ever got
along without it!!!

Questions? Send Questions to or
call 512-267-4274
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