Programmability & Soft-Land™

If the actuator is in vertical plane with no spring return, it will use a certain amount of power just to hold its position. If the payload is excessive, this alone could be enough to exceed the duty cycle.

Laws of physics state that: Force = Mass x Acceleration

The actuator has a low moving mass, therefore with constant force applied and no load, a large acceleration will result. This will drive the rod into the end-stop on the actuator and may cause damage if it is repeatedly done.

The actuator is a precision piece of equipment in terms of both force and position. Alignment of the linear axis components must be maintained to ensure smooth running of the rod. To ensure it remains functioning in the correct manner, it is advisable to follow the guidelines.

Shaft Run Out: Shaft run out is typically <50 micron.

Resolution and Repeatability: Resolution, when applied to SMAC products, is defined as the smallest position increment produced by the encoder. Our standard encoder resolution is five microns, although most actuators also have the option to be fitted with a one micron or half micron encoder. Repeatability, sometimes referred to as reproducibility, is the ability of a system to return to a given position with little or no deviation. One of SMAC's principle advantages is the absence of any mechanical backlash which is inherent in so many stepper and ballscrew systems. In addition, our encoder reads the true linear position rather than converting the stepper motors rotary encoder signal to the linear ballscrew movement. With correct PID tuning, our actuators are repeatable to two encoder counts.

Controller Reporting and QA Functions: The controllers can output pass/fail and product performance figures, which can then be used in statistical QA and production analysis.