Sites:
Home > Technical Library > Motion and Controls > Motor Controls and Drives > Bouncing off of a Limit Switch (.pdf)

Bouncing off of a Limit Switch

From Galil Motion Control

When using a pulse type switch with the HM command, the motor will always begin motion in the same direction, irrespective of the position of the motor. One method forusing a pulse type or momentary home switch is to implement a routine to "bounce off"of the limit switches. In this method, the motor is commanded to HOME. If the motor ison the 'wrong' side of the home switch, the motor will eventually hit the limit switch. If this happens, the controller will move the motor to the other side of the home switch andre-issue the HOME command.

Read the Whole Article
Products & Services
Servo Drives
Servo drives provide electrical drive outputs to servo motors in closed-loop motion control systems where position feedback and corrective signals optimize position and speed accuracy.
AC Motor Drives
AC motor drives interface controllers to AC motors. They match the control signals (voltage and power levels) as well as the signal type (analog or digital). They also provide power conversion, amplification, and the sequencing of waveform signals.
Motion Control Systems
Motion control systems contain matched components such as controllers, motor drives, motors, encoders, user interfaces and software. Components in these systems are optimally matched by the manufacturer.
Stepper Motor Drives
Stepper motor drives power unipolar and bipolar stepper motors in full step, half step, and microstep motion control applications.
DC Motor Drives
DC motor drives act as the interface and power supply between a motion controller and a DC motor.
Product Announcements
E-Drive Design, Inc. - The Eliminator SS™ Super Speed Linear Actuators
The Eliminator SS™ Super Speed Linear Actuators by E•DRIVE The Eliminator SS™ Super Speed ball screw linear actuator provides a strong, durable, and precise linear motion actuator... (read more)
Gullco International Limited - Welding Carriage for Indexing / Cladding - KAT®
The Gullco KAT® Indexing System is typically used to automate single or multi-head overlay/cladding welding operations, hard surfacing, etc. The automatic routine drives a motorized device (either... (read more)
Topics of Interest

Without sensors, a robot is just a machine. Robots need sensors to deduce what is happening in their world and to be able to react to changing situations. This section introduces a variety of robotic...

This Application note details three common methods of homing. The three methods discussed are: 1. Home to a dedicated Home switch (rotary axis) 2. Home to a forward or reverse limit switch (linear...

Speed, Torque, and Gear Reduction It was mentioned earlier that the power delivered by a motor is the product of its speed and the torque at which the speed is applied. If one measures this power...

Responding to demand, Cole Hersee now offers a 50A DPDT switch with heavy duty components that deliver continued reliability. Constructed with heavy gauge (3/32" thick) terminals and silver-laminated...

High-thrust linear motors make it possible to use force servoloops to suppress stiction. Tubular linear motors from California Linear Devices are three-phase, direct-drive, brushless dc motors with...