Rockwell Automation MPAS Integrated Linear Stages - Manual (Page 37)

Rockwell Automation Publication MP-UM001D-EN-P - September 2013 37
Mounting and Connecting Chapter 4
c. Fully seat the feedback connector and the power/brake connector.
• Hand tighten the collar of a threaded DIN (M4) connector six turns.
• Hand tighten the collar of a SpeedTec (M7) connector one-quarter turn.
About the Air Option for Ball
Screw Linear Stages A ball screw linear stage can connect to an external air supply via the air port,
item
21 on page 20. This can reduce the ingress of particulates in a dusty
environment.
• Air supplied to the ball screw stage must not exceed 270 kPa (40 psi).
• Plastic air tubing must be 6 mm (0.2362 in.) OD Teflon FEP tubing.
About the Brake Option for
Ball Screw Linear Stages The brakes offered as options on the ball screw linear stages are holding brakes.
They are designed to hold the carriage in place up to the rated brake holding force.
The brakes release when voltage is applied to the brake coil. Voltage and polarity
supplied to the brake must be as specified to be sure of proper brake performance.
The brakes are not designed to stop the movement of a linear stage. Use the servo
drive inputs to stop motion. The recommended method of stopping motion is to
command the servo drive to decelerate to 0 mm/s (0 in/s), and engage the brake
after the servo drive has decelerated the linear stage to 0 mm/s (0 in/s).
If system main power fails, the brakes can withstand use as stopping brakes.
However, use of the brakes as stopping brakes creates rotational mechanical
backlash that is potentially damaging to the system, increases brake pad wear, and
reduces brake life. The brakes are not designed nor are they intended to be used
as a safety device.
Table 2 - Brake Specifications for Ball Screw Linear Stage Motors
ATTENTION: Keyed connectors must be properly aligned and hand-tightened.
Improper alignment is indicated by the need for excessive force, such as the use of
tools, to fully seat connectors.
Connectors must be fully tightened for connector seals to be effective.
Failure to observe these safety procedures could result in damage to the motor,
cables, and connector components.
Motor Cat. No.
Backlash
(brake engaged)
Holding Force
Coil Current
(at 24V DC)
Brake Response Time
Release
Engage -
Suppression via
MOV Engage -
Suppression via
Diode
μm (in.) N (lb) A ms ms ms
MPAS-xxxxxx-V05xA 100 (0.004) 5187 (1166) 0.46…0.56 50 20 42
MPAS-xxxxxx-V20xA 1294 (291)