6
To start the Vibratory Feeder after all connections
have been made, turn the switch on the control to
the “ON” position and adjust the feed rate by rotating
the control knob. Do not operate the unit with
any associated equipment touching any part
of the unit.
No routine maintenance or lubrication is required,
except that any accumulation of foreign matter should
be periodically removed from between the tray and
the body to prevent restriction of movement of the
vibratory elements.
Adjustment (Tuning)
Eriez feeders, when shipped from the factory with
a tray, are tuned and require no further adjustment.
However, if tray is to be attrached in the field or
replacement liners installed, etc.. final tuning may
be required. In this instance the instructions outlined
below should be followed:
This unit is adjusted by changing the stiffness of the
springing system. Spring stiffness adjustment consists
of varying the number of springs (Part 8, on part list)
at the back of the unit or the thickness of individual
springs. Access to the rear springs is gained by
removing the cover (Part 6, on part list) at the back
of the unit (see Figure 3). In tuning, the front springs
need never be disturbed. In NORMAL OPERATION
at full voltage with the unit fully warmed up, the
displacement of the tray, measured at the back of
the tray or the tray mounting brace is .065" – .070"
(1.65 – 1.78 mm) for 58B, 70B and 75B; .055" –
.060" (1.4 – 1.5mm) for 62B and 65B. Excessive
displacement will result in noisy operation of the unit
and may, if continued, cause damage to components.
Operation
CAUTION
(Please Read Carefully): Only those feeder trays
approved by Eriez are acceptable under the limits
of our warranty. Any modifications, alterations, or
changes of any degree must be approved by the
Eriez Manufacturing Co.This is a tuned device
and the correct tray must be applied to the motor
drive for which it is tuned. NEVER OPERATE THE
UNIT IN A STRIKING CONDITION!
Adjustment (Tuning) Guide
The following general rules should be kept in mind
when making adjustments:
1. To increase the tray displacement, decrease
the stiffness of the spring system.
2. To decrease the tray displacement, increase
the stiffness of the spring system.
The above rules are true where the unit is operating
on the normal side of its tuning curve. If increasing or
decreasing the spring stiffness has an effect opposite
to that noted in (1) or (2) above, it means that the
mass of the tray and/or load has been great enough
to throw the operating point to the reverse side of the
curve, which is undesirable. In this event, the stiffness
should be increased (or the tray-load mass reduced)
until the behavior is in accordance with rules (1) and
(2) above. The unit can then be properly tuned.
Normally spring thicknesses of 5/16", 1/4" 3/16" and
1/8" (7.9, 6.4, 4.8, and 3.2 mm) are used. To serve
as a guide in tuning, the following spring stiffness
figures should be used: 1/4" (6.4 mm) thick spring is
approximately 53% as stiff as a 5/16" (7.9 mm) thick
spring; 3/16" (4.8 mm) thick spring is approximately
44% as stiff as a 1/4" (6.4 mm) thick spring; and a
1/8" (3.2 mm) thick spring is approximately 30% as
stiff as a 3/16" (4.8 mm) thick spring.
Example: to slightly increase the deflection of a unit
a 1/4" (6.4 mm) thick spring could be removed and
replaced with two 3/16" (4.8 mm) thick springs. Or, to
slightly decrease the deflection of a unit, a 5/16" (7.4
mm) thick spring could be removed and replaced with
two 1/4" (6.4 mm) thick springs. These combinations
must be determined by the existing springs on the
rear spring stack.
FIGURE 3
REAR SPRINGS CLAMP BLOCKS REAR COVER
