So you are staring at the inert chunk of metal you just pulled off your top drive, wondering why it isn't a working encoder any more, and what you can do to keep the spare running longer.  Is there a wiring error?  Did someone change the encoder wiring?

To understand how to stop encoder failures on your top drives, you have to understand the failures themselves.

In my previous blog, we discussed some of the causes of rotary encoder failures on top drives.

In this blog, we'll dive a bit deeper and look at the failure modes themselves.

Top drive encoders are mission critical. If you don’t want idle rigs sapping your profits, you need a clear understanding of the challenges and potential problems that can come to your operation.

Although top drive encoders are becoming more durable and reliable, there are still many problems that can arise. After all, a huge locomotive-grade electric motor meshed with a 750 ton capable gearbox is often left to depend on a rotary encoder’s glass disk, fragile electronics, and one tiny 40lb single-row bearing!