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Showing posts with label post. Show all posts
Showing posts with label post. Show all posts

Saturday, 19 September 2020

Reversing direction - Single phase motor

Before you buy motor for an application, it's better that you know how it's wired and if the direction can be easily changed or not. You can easily change the direction of a three-phase induction motor which has three output wires (i.e. wired as star or delta in stator) by simply interchanging connections of two of the stator leads. For example if previously the connections phase were RST, interchanging the leads would change the phase to RTS or SRT and the direction would change.

Reversing direction of a three-wire, three-phase induction motor

Unlike a three phase motor, reversing direction of a single phase motor can be a bit complicated. This is the problem that I recently had to face. I bought an old table saw and it came with a single phase motor and I had to reverse the direction of this motor. I would have used the motor in default configuration by simply using it from the other side, but it would have meant that the nut may get loose during operation which can be dangerous, so this is something that had to be done without fail. I followed the steps mentioned below to complete the task.

Monday, 27 July 2020

How to find Catia file version and release information without using Catia?

Catia files are forward compatible i.e. you can save a Catia V5R18 file in Catia V5R19 or above easily without any issues and can prevent the specification tree history. However, it does not offer backward compatibility i.e. files modeled in later release cannot work with prior version perfectly and you will lose specification tree if you open it. Also, you should not save the file else you will also not be able to open it in the release it was modeled and it will be corrupted.