Operating Manual
STI-2420 | STI-2418LP
33
reduced and the likelihood of different tool heights being used is increased since it is difficult
to match used diamonds exactly; this also causes an uneven cut.
The aluminum tool plate offers a flat cut when new or used because the tooling is mounted
using hardware on a flat tool plate holder. The tools are mounted using hardware that does
not allow any discrepancy in height when mounted properly. Another advantage, when
multiple tool plates are purchased, the operator can keep the tool plates assembled with
each diamond type when not in use so that the diamond tools will be kept in matched sets
until they are depleted; this accomplishes both a flat cut as well as maximum diamond
lifespan. The disadvantage of the tool plate is that an impact wrench and sockets are
required to change tooling; the time it takes to change tools on a tool plate versus a 2-inch
stone plug holder is approximately 5 times as long.
To sum up the difference between the two holder types: Convenient tool change at the
expense of a flat cut if stone holders are not replaced after 100,000 square feet (10,000 m
2
).
9.8
Segment Attachment
When attaching the diamond segment to the tool plate ensure that the hardware is tight
to keep tool from loosening. Also make sure that the tool plate, as well as the diamond
segment, is clean where they meet to ensure the flattest possible cut. If the surfaces have
build up, the diamond tool will cut at an angle that will essentially be gouging the surface of
the concrete rather than grinding across it.
9.9
Recommended Weight Configurations
The Prep/Master
®
machines come with the necessary amount of weights needed to perform
all the processes it has been designed for. It is important to realize, however, that the full set
of weights will not be used for all applications. So when polishing concrete, for instance, the
machine may only need half the available weights on the head to provide the polish that is
desired on that particular slab; weight will also affect the life of the polishing tools being used.
It is important to note this because when performing any process with the Prep/Master
®
the
operator must establish what amount of weight is needed to yield the best possible product;
in the shortest amount of time and with the least expense in diamond tooling cost.
9.10 Recommended Speed Settings
Any given tool has a safe operating range with regard to speed. As a rule, no tool is to be run
at less than 30 Hz or more than 90 Hz. To determine the best speed, it is best to start slow
(+/-45Hz) and monitor the tools performance. For all tools listed in this guide, appropriate
speeds follow each product description.
