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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