Motor Reworking – Telltale Signs

Spindle motors and servo motors are generally more robust than their drive counter-part, which can be great news but could also lead to some pretty bad news. Due to the robustness of motors in comparison to the servo or spindle drive controlling them, a problem with the motor will generally cause damage to the drive as well when something catastrophic occurs. Luckily, with proper care and attention, this can be avoided in most cases if the correct signs are being looked for. Read More

Absolute vs Incremental Encoders

In the world of feedback, AC motors will typically utilize one of an optical absolute encoder, an optical incremental encoder or a resolver. This article will focus on the primary differences between the absolute and incremental encoders. Read More

Series Overview:

Yaskawa offers many different types of AC servo drive units and the CACR-SR_BB1 is one of the more common drives we work on and see often at our facility. This series is offered in a few different output ratings, starting at 0.3kW (300W) and leading up to 6.0kW. The model number includes characters to represent the applicable motor series as well as the pulse count the encoder will need to have. Encoder pulse options vary by application and there are options for 1000, 1500, 2500, 4000, 5000, and 6000 pulses per revolution. Read More

Here at Precision Zone, we use specialized testing equipment for full evaluation of motors and their performance. With these tools we are able to obtain a complete analysis of the motor’s health.  With just a quality multimeter, a reduced test can be performed to try and identify any major issues with the motor’s windings. Typically, a milliohm and megohm meter are the recommended tools of choice for field evaluations but a multimeter can work as well. Read More