My 12 year old impact driver seemed worn out so I replaced the motor. That fixed it. This is called cutting to the chase. Here's a link to the part I used. Motor Service Assembly 23-30-0090.
I did some more research into the physics of what exactly is happening in an aging motor. As far as I can tell the issue is that the windings in the motor have a failure of the insulation. They get crammed with carbon dust or other conductive crud which lowers the insulation resistance and pulls more current from the battery. This is why you aren't supposed to use compressed air to blow out a motor housing. All these extra amps are burned up as heat instead of turning into torque. This is basic Ohm's Law logic. Motors are supposed to have a really high insulation resistance. When it starts to fall off then the motor no longer does the same amount of work with the given voltage. None of the sources I found come right out and say this. But that's the manifestation of the issue for me in particular.
My research did reveal that the smell I associate with my grandmother's old Sunbeam mixer creaming butter and sugar for pound cake is actually ozone and vaporized graphite. When my impact driver started making that smell it made me hungry for pound cake, but in fact it should've told me the brushes were breaking down. I always thought worn brushes manifested as an on/off problem. Apparently this other failure mode is also common.
There's a film that forms on the commutator made of copper and carbon and water vapor. It requires the exact right amount of current and humidity to make this protective film that is constantly broken down and reformed. I expect my very humid climate and only using my tool occasionally made it prone to over-filming which lowered the resistance even more, burning off even more of my current as heat, running down my battery really fast without delivering enough torque to get the job done. And also making that smell that makes me think of butter and vanilla.
I have a lot of tools now that are brushless, substituting permanent magnets and microcontrollers for carbon contacts. I will miss the sense memory of my grandmother's kitchen, but I don't have a lot of patience for a tool that won't turn a screw hard enough to pull the work together.
I made a video to show what it's like change the motor in one of these tools. I could've edited it to make it look like I didn't screw it up, but I think that sends the wrong message. Everybody ends up with a part leftover. You have to accept that anything you take apart you're going to have to take it apart again at least once to put back something you missed. Shooting video of the whole thing really helps you figure out exactly where you screwed up.
Thursday, February 27, 2020
New Motor Who Dis?
Subscribe to: Post Comments (Atom)
I admire this article for the well-researched content and excellent wording. I got so involved in this material that I couldn’t stop reading. I am impressed with your work and skill. Thank you so much. Magnetic core materialReplyDelete
Very well written article. It was an awesome article to read. Complete rich content and fully informative. If anyone looking for the Custom soft magnetics for sale online in USA, Dxtmagnetics is the best choice.ReplyDelete
Nice blog post so thanks a lot for sharing this great blog post.. keep more post for sharing.. have a nice day.Delete
Real Estate Lawyer in Brampton
I am hoping the same best effort from you in the future as well. it is informative and well explain, thank you so much. Amorphous Magnetic Cores online in USAReplyDelete
Really, This is an impressive as well as Useful post for me. I got the most valuable and informative information from here. Thanks for sharing, I request you to keep sharing such blogs. Benchtop Torque TesterReplyDelete
It is truly a well-researched content and excellent wording. I got so engaged in this material that I couldn’t wait to read. I am impressed with your work and skill. Thanks. Custom Magnet Manufacturers in USAReplyDelete
This article gives the light in which we can observe the reality. This is very nice one and gives indepth information. Thanks for this nice article. Wohnmobil Werkstatt HamburgReplyDelete
I definitely enjoying every little bit of it and I have you bookmarked to check out new stuff you post. get paid to watch videosReplyDelete
I really enjoy simply reading all of your weblogs. Simply wanted to inform you that you have people like me who appreciate your work. Definitely a great post. Hats off to you! The information that you have provided is very helpful. get paid to complete surveysReplyDelete
purchase yt views YouTube has long been the primary video sharing website on the planet. Different users all over the world can go and see different videos about a wide range of topics. Watching a movie, learning about a certain topic, seeing someone's point of view when doing a specific task, and a whole lot of other things can be done just by watching the videos posted on YouTube.ReplyDelete
You made some good points there. I did a Google search about the topic and found most people will believe your blog 메이저검증업체ReplyDelete
Thank you for the information provided! Maintain the good performance of your site. You can also check my article 토토ReplyDelete
That really useful information. It helps a lot. Thank you. 메이저사이트ReplyDelete
If you keep it like this, I ll visit you every day. I will continue to grow. If this part is maintained 먹튀검증업체ReplyDelete
Venturing out to New Zealand offers up potential chances to enjoy various rare encounters, from skydiving above New Zealand's sensational landscape to flyfishing or immense trout in gin clear water. Colive discount couponsReplyDelete
There are many benefits of a very much delivered corporate video. VideoReplyDelete
Celebrity Videos can be entertaining. funny songsReplyDelete
By coordinating an enhanced video into your organization's website,you can draw in youre crowd for longer than you can with basic text and pictures. This implies you're multiple times bound to be included on the first page of Google list items. https://crackstreams.show/ReplyDelete
This comment has been removed by the author.ReplyDelete
Anybody entrusted with the obligation of an organizations promoting that has not thought of and investigated video for advertising shouldn't be visible as taking care of their business appropriately!ReplyDelete
buy youtube watch time
It happens to us all. We pay attention to our main tune for a really long time, and in no time, https://www.spotifyfame.com/ReplyDelete
Acknowledges for paper such a beneficial composition, I stumbled beside your blog besides decipher a limited announce. I want your technique of inscription... Satta resultReplyDelete
Really appreciate you sharing this blog post. Really thank you! Really Cool.ReplyDelete
corporate video production company
Get all the latest, trending, upcoming and top news of India. Watch some upcoming and top youtube videos and also a few viral memes. Watch funny memes, amazing youtube videos, watch the latest trending topics going viral in India. Also get some Indian news which is going viral. Get some unheard viral news which has been trending, latest and unknowing viral news going viral in India. trending topics in indiaReplyDelete
So great! You did an amazing job. dumpsterrentalcollegestation.comReplyDelete
Since riding an electric bike is significantly more pleasant in sloping country, into solid breezes, or while conveying weighty burdens, clients will generally utilize them. Macfox-2ReplyDelete