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| MDF Base |
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| Close up of base |
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| Motor book |
Weekend reading
1 hour ago
Sunday, August 25, 2013
Update on the Hobart Coffee Grinder
Progress on the coffee grinder has slowed considerably. After reassembling the motor I discovered the motor will start, but does not run. A quick check with the ohmmeter revealed an open run winding. I fear I damaged one of the wires in the run winding during the cleaning process. A rewind from the local motor shop is prohibitively expensive, so I will attempt to rewind it myself. I purchased an old book on motor rewinding online and have been studying it to see if a home shop rewind is doable. I will of course share what I learn. In the meantime, I fabricated a new base to replace the deteriorating rubber base and have been polishing some of the aluminum pieces. Here is a shot of the new base and a shot of the motor book.
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- Scott
- Midlands of South Carolina, United States
- Husband, Father, Quality Engineer, Electronics Professional, and tinkerer. Facinated by old technology and well made old tools. Old iron is good.
7 comments:
love the photo of Becky :)
Very cool project that is interesting to me as I just acquired the same grinder last weekend from my wife's grandfather's old hardware store last weekend. I just started disassembling it last night. I'm curious what product you used to remake your base as my red rubber is deteriorating as well (new rubber vs. painted wood)?
I glued together two 1/2" pieces of MDF board to get the 1" thickness I needed. I then rounded over the edges to batch the profile of the original. I had to countersink the bolt holes to get enough thread engagement to bolt it on. I could have routed out the section below the spout to match the original, but I thought it would weaken that corner too much. I used automotive spot putty to fill the raw edges of the MDF. Primed, sanded and painted.
Looks really good. I just bought the same model grinder at a garage sale, so I'm looking forward to future updates on your progress. They might help me figure out the mess I've gotten myself into.
I'm glad I found your blog; there's some great stuff here!
Hey Scott,
Glad I found your blog. I'm in the process of disassembling my own grinder, and will be checking back as I get to attacking the motor.
Thanks for documenting it so well!
That is a very cool machine Scott. B
Thanks Buttons,
I have all the parts to complete it. I think the remainder of the motor repairs will make a good rainy day task.
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