Precise work requires the right
equipment and when it comes to gantry and xy tables there are a lot
to choose from.
The X, Y standard laser table range
from a 15"x 15" to 51" x 100" in size. Many
companies who produce these tables offer a wide range in
configuration so that the customer gets the right table for the
application.
Depending on what you will be using the table for, you
need to consider size, dependability as well as affordability.
Depending on the type of construction needed the simplest form of 2
linear degrees of freedom of a positioning system where the base of
the top axis is screwed to the carriage of the lower axis is the
best.
The standard X, Y table is usually
designed and built from heavy duty steels including stainless and are
meant to last for many years with nominal maintenance. The X, Y table
is no small expense so purchasing a long lasting one is important.
Most table working tops are built for toughness in design for
rigidity and stressed relieved for minimal environmental effect. Most
companies attempt to create the precision ground for most tables to
be better than .001".
Precision rails and bearing blocks are
used to give the customer accurate and repeatable operation. Most
basic tables are fairly accurate however higher accuracy tables can
be ordered from most companies.
Vibration control within the tables
make for minimal vibration, since when working on a delicate project
vibration can be a concern, most companies offer this, however the
there may be a cost difference in the tables that offer a higher
vibration control. The other important thing to consider is the job
you will need the equipment for; there may be no need for vibration
concerns. The best thing to do in order to determine which table is
right for your company is to speak with your vendor.
There are also different gantry designs
to address specific applications. According to most companies
standard models use ball screw drives for the gantries and high speed
raster scan models use a precision belt drive. Clients can order
various options for the bases for any of the models of the gantry
tables. There are many amenities that can be included with metal
cabinet doors and casters being two of the most popular.
Gantry
configuration is important because a gantry driven by linear motors
and designed for high natural frequency can provide a company with
the right equipment that combines high precision, high speed and low
settling time thus making the best use saving time and money.
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