Festo Кабели и принадлежности - Manual (Page 90)

3. Installation
3−12
Festo P.BE−SPC200−EN en 0901d
Measuring systems with actuator slides
ć If you wish to use a measuring system with a slide under
difficult ambient conditions, fit it so that the side with the
actuator slide faces downwards. The drip edge on both
sides prevents excessive dirt from forming on the running
surface.
3.2.8 Requirements of the mechanism
ć The drive, guide, measuring system and load must be
rigid in the direction of movement, have very little play
and must be mounted flush with each other.
ć If necessary, provide a sufficiently large supply of energy
in order to minimise the effects of transverse forces on
the positioning behaviour.
ć The play between the drive, guide, mass and measuring
system must be smaller by the factor 10 than the required
tolerance, but never greater than 0.1 mm.
3.2.9 Mass load
For good positioning behaviour, the SPC200 must be adjusted
to the mass load. Here the mass load represents the comĆ
plete mass to be moved with the positioning drive, including
the weight of the piston and the slide. It consists of the mass
of the workpiece ć which generally changes during the proĆ
cess ć and all other parts of the drive with mass, such as pisĆ
tons, piston rods, slides, workpiece grippers or gripper units,
etc. which are defined during the design engineering, and
generally do not change:
Mass load = workpiece mass
+ total moving mass without workpiece