Test Stand (R-40041), concrete foundation or heavy bench capable of supporting 200 lbs.
Moderate tension of the mounting bolts is all that is required.
Basic Operation
A) Ro-Tap
®
Assemble a stack of sieves, beginning with the top cover, the coarsest (largest) sieve opening on top, with a
pan on the bottom. Place the stack into the shaker, with the hammer tilted up and out of the way. Place the
Ro-Tap
®
sieve cover, with the plug installed, on top of the sieve stack. The sieve support clamp bar is then
adjusted, by loosening/tightening the two adjustable handles. Press the yellow buttons and turn handles in the
appropriate direction. Bring the top of the Ro-Tap® sieve cover flush with the top of the upper carrying plate.
NOTE: Some force may be required to move the support clamp bar on the Ro-Tap
This is due to the resistance of the gas safety spring.
B) Coarse Sieve Shaker
Assembly of the sieve stack is the same as with the Ro-Tap
down by screwing the two knobs down on the threaded clamp bars.
Starting the Shaker (Timer Function)
Make sure a sieve stack is in place at the time. To set the test run time, set the test duration by pushing the
increase button until the desired time appears in the digital window. Push the start button to begin the test.
An audible tone will be heard at the end of the test.
Should you wish to stop or interrupt the test at any time, simply push the stop button. Note that the remaining
test time is frozen on the readout. To continue, simply push the start button. Once a test is complete, if you
wish to repeat the prior process, simply push the start button. The most recent time will remain in memory.
NOTE: The timing device also has a clock function. To use this option, hold the “clock” set/display button and
adjust the proper time with the increase/decrease buttons.
®
Models RX-29 & RX-30 & Coarse Model RX-812) must be mounted on a
®
II (RX-94).
®
. The clamping assembly is adjusted from the top
2
HAMMER DROP ADJUSTMENT
PLUG
SETTING THE HAMMER LIFT HEIGHT
Ro-Tap® MODELS: RX-29 and RX-30 and RX-94
(NOTE: THIS SETTING HAS BEEN MADE ON ALL NEW UNITS)
NOTE: Prior to hammer adjustment; make sure plug is seated firmly in sieve cover.
Make sure sieve cover has top edge flush with upper carrying plate. A stack of sieves
must be used to achieve this setting.
STEP 1: Remove pedestal cover.
STEP 2: Jog machine until hammer rises to maximum height or use a box wrench on the hex
head screw, located on top of the pedestal. Check height with scales.
STEP 3: Set height to 1-5/16 +
STEP 4: Tighten screw on coupling.
STEP 5: Replace pedestal cover.
Lubrication
The Tyler Sieve Shakers require only minimal periodic lubrication. The units incorporate plastic and oilimpregnated bronze bearing materials, which are self-lubricating. A few drops of light oil or WD-40™ every six
months is all that is necessary to prevent drying of the parts. Application of the same lubricants will suffice if a
squeak or a drag should develop in the mechanism.
1/16” by loosening screw on coupling and adjusting lift rod.
PLEASE BE ADVISED: Review these warnings prior to use
Switch on the machine with the
All Indicators on the front panel will read “0”.
Time
The sieving time is shown in minutes (99 minutes maximum) and appears in the indication field of
set values/actual values. The sieving time will countdown to “0”. Without setting the sieving time
(set point 00) the machine operates continuously.
The sieving time can be fed by one pair of entry keys for each function. The left key decreases,
while the right key increases the test time. When pressing one of the keys for a longer moment, the
numbers pass quickly.
Analysis Settings
There are two amplitude analysis settings
The Model Ro-Tap® E features an intermittent operation. Every 10 seconds,
Analysis Guide: If the smallest particle is 1 mm (USA #18) or greater in size,
Start/Stop
To start the machine, press the START button. As the unit runs, the remaining analysis time
will be shown in the display window. To stop the machine, press the START button again.
the machine will pause for 3 seconds, allowing the sample to settle.
use the COARSE analysis control setting. For all other applications,
Each material application is different. Local analysis may be
main switch
required to determine which
control setting will produce the best results.
(located at the rear of the unit).
.
One for
use the FINE setting.
coarse
and the second for
fine material
.
11
NEW HAVER TWINNUT CLAMPING SYSTEM
The new ‘Haver TwinNut’ clamping system perfectly combines the advantages of the
previous Classic and Easylock Systems.
Function:
The sieve is fixed using the nuts in the same way as the Classic system (1.0 + 3.0).
Varying heights of the sieve tower are achieved by opening the TwinNuts (2.0).
1.0 2.0 3.0
Advantages:
The test sieves can be changed easily and quickly.
Only a small turn is required to open and close the nuts.
The wing-handles make the tightening of the nuts eaiser.
The guide rods of the Classic system can also be used for the TwinNut system
(it can be refitted at low cost).
No grease and dust sensitivity.
Suitable for every application area.
Suitable for all HAVER Test Sieve Shakers.
12
RX-29 E Ro-Tap
®
PARTS DIAGRAM AND PARTS LIST
Item # Piece Designation Article #
1 2 Nuts for clamping system Easy Lock® 00560129
1 Inspection glass without hole for machine cover (dry) 00561499 2
1 Inspection glass with hole for machine cover (wet) 00561507
3
4 3 Rubber buffer 66000074
5 Test sieves (sold separately)
6 2 Guide rods, clamping system Easy Lock®, 660 mm long 00560154
7 1 Oscillation magnet 65300016
8 1 Rubber profile for vibration body 00560441
9 1 Vibration body 68500312
10 3 Rubberized pads 00560014
11 3 Leaf spring 68500231
12 1 Base plate 68500311
14 1 Rubber ring for vibration body Ø 204 / Ø 160 68500015
16 1 Sieve pan with outlet
18 2 Counter nut
19 1 Precision fuse, 20x5 mm, 3, 25 Ampere MT (not shown) 65100000
20 1 Rubber seal for cover (not shown) 00560434
1 Cover with inspection glass 00561521
1 Cover without inspection glass 00561514
1 Cover with inspection glass and wide spreading spray diffuser 00561545
1 Separate control unit 00560169 13
1 Front panel with control board
1 Plug connection with main switch and fuse box 17
1 Plate with cable with screw fitting
*Call Customer Service for current pricing
800.321.6188
13
TEST SIEVE ANALYSIS
Test Equipment
Test sieves “nest” together to form a “stack” of sieves. In most sieving tests the 8 inch diameter sieve is used.
A test sieve shaker that provides both circular and tapping energy is recommended. Uniform mechanical
motion will provide the most consistent results.
Testing Times
Free flowing, coarse material requires less time than fine, bulky particles. Once you establish the proper time,
duplication of testing becomes extremely important to obtain accurate, repeatable results.
Conduct repeated experimental testing to determine the optimal testing time. For example, perform tests of 5,
10, 15 & 20 minutes. You can determine the optimal time when the results between the different times change
no more than .5 to 1 percent. The shortest time should then be used consistently.
Performing a Sieve Analysis
You can begin your particle size distribution analysis after you properly collect, prepare and size a sample.
Select test sieves with mesh openings that reveal particle distribution at critical sizes. These are usually stated
in a product specification or determined by material processing requirements.
To perform the analysis, do the following:
1. Stack the sieves on top of each other with the coarsest (largest) opening on the top of the stack.
2. Put a bottom pan under the finest (smallest) opening sieve. This pan collects “fine” material that passes
through the last one.
3. Use a laboratory scale (accurate to .1 gram) to weigh an empty container (such as an extra empty
bottom pan) and establish the tare weight.
4. Weigh the sample material.
5. Empty the sample into the top of the stack. Make sure you do not overload the surface as this causes
“blinding” or blocking of the openings.
6. Put the stack into the sieve shaker.
7. Place a cover on the top of the stack.
8. Make sure the stack is securely in place.
9. Set the proper length of time to agitate the material.
10. Turn on the shaker and run the test.
11. After the shaker stops, empty the material from the coarsest sieve into the empty container that you
weighed in step (3). Use a soft bristle brush to gently brush the underside of the sieve to remove all of
the particles.
12. Tap the side of the frame with the handle of the brush to clean the remaining material from the sieve.
13. Weigh the contents in the pan to the nearest 1/10 gram and record the data.
14. Return the material to its original sample container.
15. Repeat steps 11 through 14, using the container referenced in step (3) for each sieve, including the fine
material in the bottom pan.
16. Total the weights to make sure the sum of the retained material and the material in the bottom pan is
as close as possible to the original weight. Check your specification for allowable variation.
17. Divide the weight obtained from each sieve by the weight of the original sample. Record the percentage
for each sieve.
18. Calculate and record the cumulative percentages as required.
14
The key to successful, repetitive particle analysis is developing standard testing procedures.
Basic Elements of Testing
1. Sample Preparation.
2. Test sample sizes or weights.
3. Test Equipment.
4. Testing times or intervals.
5. Recording results.
Sample Preparation
When deciding how much material to test, consider the type of material, screen ability of the material and the
range of particle sizes.
If the particle range of material representing feed to a screen or product from a crusher is wide, use a large
sample (from 500 to 1,000 GRAMS). If the material is finely ground, use a smaller sample of 25 to 100 grams.
Do not use too large a sample in the test. The smaller the sample, the more consistent the results (as long as
the sample is properly taken). To obtain an accurate sieve test sample, every particle must present itself to the
screen openings for retention or for passing through to the next finer sieve. Make sure the sample is large
enough so that the coarsest sieve retains enough representative particles.
For example, if a “stack” contains six sieves, a fine particle must repeat the passing process six times. The fine
particles cannot pass through to their proper end when overloading occurs.
As a general rule, limit the size of a sample in weight so that no sieve in the “stack” is overloaded. Overloading
usually occurs in testing closely graded materials, where the range of particle size is limited. In such cases,
determine the size by capacity of the sieve that retains the largest amount of the sample.
Use the following procedure to determine your sample size:
1. Accurately split out samples of varying weights (25, 50, 100, 150 and 200 grams) with a sample splitter.
2. Run the various samples on the selected sieves for five minutes.
3. Compare the results to get the correct sample size.
When two sample sizes provide similar results, use the larger of the two for your test size. For example, if the
100 gram sample shows approximately the same results as the 50 gram sample, but the 150 grams sample
produces differing results, use the 100 gram sample as the correct sample size.
Near-mesh particles (those with dimensions close to the sieve opening) require that you lightly load the sieves.
This allows presentation of the particles to the sieve opening many times, which allows maximum opportunity
for accurate classification.
Wet Testing
Some materials do not test well under dry conditions. If the material is not water soluble, you can perform an
accurate sieve analysis with special equipment.
The Sieve Shaker with a Wet Test Kit will be required. The wet test kit ensures there will be no splashing or
contamination of the samples.
The test should be performed the same as dry material (previous section) with one exception.
Water, as called for by the test procedure , must be added to the sample prior to the test run.
15
Static Electricity
Some materials generate static electricity during the dry sieving process. When particles “charge” themselves
as they come in contact with other particles, they stick to the metal frame and cloth of the sieve.
This prevents you from obtaining accurate results.
As a suggestion:
Add a small amount of talc, activated charcoal, powdered magnesium carbonate or burgess clay to the
sample material. For a 100 gram sample add approximately 1 gram of chemical.
Mix thoroughly to completely coat the particle surfaces.
Perform the sieve test.
This method may not eliminate static electricity entirely; however, the effect should be significantly
reduced and will not affect your test results.
16
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