Junpei Posted October 20, 2013 Posted October 20, 2013 Today I was planning on upgrading an XL motor for my crawler (with a 13000+ RPM motor) and I was wondering how to take it apart without destroying the case, like in the TB look inside it. I also was wondering if there was any way to just extend it one stud for the motor to fit. I wonder how much torque the motor really has, it doesn't say.... Quote
Boxerlego Posted October 20, 2013 Posted October 20, 2013 (edited) The XL motor is difficult to take apart with out breaking the small flat clips at the end of the case. The only tool you will need to have is a small flat head screw driver that can completely fit over the dark gray clip. You are going to need to carefully chisel away some of the surface over the dark gray clip so you then can press the adjacent sides and pull apart. In the beginning of this video here shows how to press the sides together to take separate the motor case . When the motor is dissemble you then can use a file to smooth up the dark gray clips and make the edge so the two motor case can clip together. To extend the case you can either cut the light grey case in half and extend it with a equal size plastic pipe as the case, then rejoin the two halves together with fast drying super glue or you can cut out a hole in the back of the case so the motor can poke out the back. It is important for the motor to fit inside the case and lock together so the motor does not turn around. With 3D printer it would be awesome to make custom motor case that fit over the XL planetary gearbox and have bigger motor inside. Edited October 20, 2013 by Boxerlego Quote
Junpei Posted October 20, 2013 Author Posted October 20, 2013 With 3D printer it would be awesome to make custom motor case that fit over the XL planetary gearbox and have bigger motor inside. <cough> TasV <cough> Thanks for the info Boxerlego, I'll try that today. I still need to order the motor tho, so I might wait. The measurements are perfect for an XL, I hope it works! How fast does your upgraded XL spin? Quote
Boxerlego Posted October 20, 2013 Posted October 20, 2013 Sounds Great. I cant wait to see. Make sure the motor drive shaft is 2.0mm in diameter and you will be good to go. The upgraded XL motor rpm is around 240- 260. Good Luck! Quote
Junpei Posted October 20, 2013 Author Posted October 20, 2013 I wonder how much torque it has, 13000 is absolutely ridiculous... Quote
MrNumbskull13 Posted October 21, 2013 Posted October 21, 2013 Doesn't the XL motor (without planetary gears) spin at around 1000 rpm? Quote
Junpei Posted October 21, 2013 Author Posted October 21, 2013 TasV I meant maybe you could design the case, I was just kind of hinting that. MrNumbskull13, an ungeared XL spins just about that fast, maybe a little faster. To put the speed of my motor in perspective, that's 20 times the speed of a buggy motor. Quote
TasV Posted October 21, 2013 Posted October 21, 2013 Ooooooohhhh.. I barely have time to scratch myself atm... I'll leave that job to someone more qualified and endowed with time ;) Quote
Ralf Posted October 21, 2013 Posted October 21, 2013 One good upgrade is the power supply. I throw all the batteries away and now i use only Sanyo Eneloop cells. Now all the motors have much more power and speed......... test it. And they are rechargable the current is in a range of 1,35-1,40 Volt a little bit more than NimH accus but much more powerful than batteries. Quote
Junpei Posted October 21, 2013 Author Posted October 21, 2013 The motor I'm using is about 13000 RPM at 7.2V, which happens to be the voltage the Lego rechargeable battery outputs, but they are just too damn expensive IMO. I wonder what would happen with one of z3_2drive's 10V battery packs... Quote
MrNumbskull13 Posted October 21, 2013 Posted October 21, 2013 The motor I'm using is about 13000 RPM at 7.2V, which happens to be the voltage the Lego rechargeable battery outputs, but they are just too damn expensive IMO. I wonder what would happen with one of z3_2drive's 10V battery packs... It would be rediculously fast and powerful and probably last half as long as it should and maybe burn out. xD Most motors can withstand being overvolted to about twice the specified voltage but they definately do not last as long, I once overvolted a 3V motor to 9V with a Lego battery pack... Quote
Technyk32231 Posted October 23, 2013 Posted October 23, 2013 (edited) TasV I meant maybe you could design the case, I was just kind of hinting that. MrNumbskull13, an ungeared XL spins just about that fast, maybe a little faster. To put the speed of my motor in perspective, that's 20 times the speed of a buggy motor. Buggy motors are fast, but not that fast. If you're being sarcastic, sarcasm doesn't work too a well over the internet. Edited October 23, 2013 by Technyk32231 Quote
Junpei Posted October 23, 2013 Author Posted October 23, 2013 I meant the speed of the new XL motor, buggymotor is about 650 RPM... Quote
750ACE Posted October 23, 2013 Posted October 23, 2013 (edited) I meant the speed of the new XL motor, buggymotor is about 650 RPM... This page and site will help answer questions. http://www.philohome.com/motors/motorcomp.htm Edited October 23, 2013 by 750ACE Quote
Doc_Brown Posted October 24, 2013 Posted October 24, 2013 I purchased a new XL, opened the bag and tested it, immediately realizing there were no grease inside at all. No choice but to open it. I cut the outside LBG plastic and wobbled it open, greased it up and then applied a small amount of superglue to where I cut, pushing it back together. It has worked fine every since, and is the most quiet and efficient XL I have. Quote
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