Glossary

A

Axis body

The axis body is a precision aluminum profile.

B

Breakaway torque

The breakaway torque describes the driving torque required to overcome the static friction and that initiates the transition to sliding friction.

D

DOM

Date of manufacturing: the type plate of the axis shows the date of manufacture in the format DD.MM.YY or in the format DD.MM.YYYY. For example: 31.12.18 corresponds to December 31, 2018

F

Feed constant

The feed constant (feed per revolution) is the distance the carriage covers per motor revolution.

L

Linear guide

The linear guide consists of:

oThe rollers and the guide rods which comprise the roller guide (PAS4•BR / PAS4•HR).

oThe guide carriages and the guide rail which comprise the recirculating ball bearing guide (PAS4•BB / PAS4•HB).

M

Mounting position

The axis can be installed in any desired mounting position. However, all external forces and torques must be within the ranges of permissible values.

P

Portal axis

In the case of a portal axis, the axis body is stationary while the carriage is moving.

Position repeatability

Position repeatability is the accuracy with which it is possible to move to a previous position again under the same conditions. To determine this value, the carriage is moved to the end position from the same direction.

S

Sensor

Inductive proximity sensors are used as sensors for limit switches or reference switches. These sensors have not a safety function.

Service life

The service life is the distance in kilometers (miles) before the first signs of material fatigue can be seen on the guides, the mechanical drive elements and the bearings. Service life specifications (kilometers covered) relate to the nominal values specified in the data sheet. If the nominal values are exceeded, the service life decreases accordingly.

Stroke

Stroke is the maximum travel of the carriage between the switching points of the sensors.

Stroke reserve

The stroke reserve is the distance between a sensor and the mechanical stop.

Support axis

A support axis has linear guides, but no mechanical drive elements. A support axis carries loads that are applied asymmetrically to the carriage and improves the stability and service life of the system.