That_LEGO_Guy Posted April 30, 2021 Posted April 30, 2021 On 4/29/2021 at 4:31 PM, 1974 said: I had well over a hundred red MMs and I've thrown out at least twenty. They just go bad and there is no cure. Ever tried to fix them and succeeded? I found one in some bulk that worked for a short time. Opened it up to your pics to see if I could fix it. The coil side of the magnet surface had deteriorated a little, thin flakes of magnet where blocking the rotor, I lightly scraped the loose magnetic flakes off the top until the rotor spun freely and it has worked fine since.I love this little motor Quote
QQriQ Posted April 30, 2021 Author Posted April 30, 2021 (edited) 2 hours ago, That_LEGO_Guy said: Ever tried to fix them and succeeded? I found one in some bulk that worked for a short time. Opened it up to your pics to see if I could fix it. The coil side of the magnet surface had deteriorated a little, thin flakes of magnet where blocking the rotor, I lightly scraped the loose magnetic flakes off the top until the rotor spun freely and it has worked fine since.I love this little motor Yes the magnet powder is closing the gap in the wrong micromotors. But I am very curiosity how could you close back the motor that the metal connectors (brushes) did not damaged. For this we had a specia tool. two tiny needle was put to the holes in the buttom of the motor which pushed away the brushes from the rotor's segments. while the motorhouse was push togetherwith the gearhouse. Is The motor what you repair was Mini-motor or micromotor.? Because there were a same problem with the mini-motor's magnets. but Mini-motors magnets got a nickel layer and here much more easier to open and reclose the motor. And in the mini-motor there are nickel "flakes" but in the micromotors there are magnet dush. Edited April 30, 2021 by QQriQ Quote
That_LEGO_Guy Posted May 1, 2021 Posted May 1, 2021 I made a tool out of a rubber and a cut in half staple. I only have a picture of the magnet after I remove most of the loose material, and it was all the same colour as the magnet. Quote
QQriQ Posted May 1, 2021 Author Posted May 1, 2021 4 hours ago, That_LEGO_Guy said: I made a tool out of a rubber and a cut in half staple. I only have a picture of the magnet after I remove most of the loose material, and it was all the same colour as the magnet. It is brilliant! Our assembly tool was "same" :-) There was a holder which hold the motor in good position. and one pneomatic which turn a little bit right when the tool upper side (where the gearhead with rotor was put) push them together. on the upper side there was a magnet which hold the gearhead in position. Quote
QQriQ Posted October 31, 2022 Author Posted October 31, 2022 the micromotor production and LMM Ltd. was part of the most well-known Hungarian TV program at the time, which presented the technological innovations of the world 25-30 years ago Quote
emielroumen Posted October 31, 2022 Posted October 31, 2022 2 hours ago, QQriQ said: the micromotor production and LMM Ltd. was part of the most well-known Hungarian TV program at the time, which presented the technological innovations of the world 25-30 years ago Great video, thanks for sharing! Quote
gyenesvi Posted November 1, 2022 Posted November 1, 2022 14 hours ago, QQriQ said: the micromotor production and LMM Ltd. was part of the most well-known Hungarian TV program at the time, which presented the technological innovations of the world 25-30 years ago This video made my day :)))) I haven't heard the intro music of my childhood TV programme in about 30 years :) And I have not seen this episode about lego motors back then! Thanks for sharing! Quote
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