I Put A 3HP Motor On My Mini Mill

G'day everyone

The control board for my milling machine (Sieg x2.7l) has recently blown. It is not exactly a huge surprise, these DC motor boards are easily the weakest part of these import machines, and it was only a matter of time before this one blew. A replacement one was going to cost roughly $400, and given that the motor is already somewhat underpowered, I didn't feel that that price was worth it.

Now since I have recently replaced the mini lathe I have a spare 3 phase 3 horsepower motor on hand, plus a VFD, and by sheer coincidence the total cost for that was $400.

So I might as well put that on the milling machine and see what happens. Of course its not that straight forward, the motor is oversized and wont fit in the stock housing. So I'll have to make up a bracket. I'll also have to figure out a way to make a replacement 5M pulley to change the pulley ratio. I'll also have to figure out how to connect the VFD to the standard control panel.

Also I find a way to break every tool that I end up using. Just one of those weeks.


Timestamps
0:00 - Introduction and 3HP motor
2:58 - Making The Motor Mounting Bracket
6:23 - Making A Replacement Pulley
11:15 - Wiring the VFD and Making A Replaement Cover
14:00 - Testing Out The New Motor

#machining #millingmachine #minimill

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