I have and love junk too. People are always saying you have to much junk. You can NEVER have too much junk! Like you said. They see junk. We see potential!
Thanks for watching! I will admit, however, that lately I have been a tad overwhelmed with the sheer amount of junk accumulation I have undergone, so I am seriously reconsidering my claim. Nah, maybe next month... heh heh
This is just what i was looking for. Looks like I need to find a buddy with a press.. plan on putting a shaft from a Jetson bike in mine the old one is rusted to death and this hoverboard motor is exactly similar minus the short shaft..
Nice video. Do you know how thick the decorative face of the motor is (the face facing out when you have it mounted on the lathe)? I either want to lathe off the decorative part so I have a planar surface for mounting something, or, possible leave the decoration on and just screw into the face there to mount something. Although I suspect I need to face it off somewhat since I doubt that face if very planar/flat.
I think I know what you mean. If I were to face off the spokes (at least for this particular motor) I would end up with about 3 mm worth of material. Not sure what you want to screw in, but maybe it would make sense to TIG weld a plate to add some thickness. Way easier than milling a negative of the decoration to weld in place, albeit another option that I can think of. Good luck with your project and thanks for watching!
@@CNCDude thanks for the reply. 3mm is probably too thin to do much with. I could press the face into casting sand and pour aluminum in to make a fitting plate without milling. Or braze a plate on (I can't really TIG, yet) using some of that aluminum brazing rod, although I never had much luck with that in the past.
Ha! Well, you didn't miss it because I didn't give it away. But I guess it was just too obvious, heh heh heh. Yup! The plan is to change the shaft so I can fit it inside of the R2D2 "shoe-box" compartment. You know, in essence I should be able to use it as it is, but seems easier to interface with two pegs instead of one. There is really not a lot of room inside of R2D2's feet... Thanks for watching!
I've been wondering if the sensoring on these motors is precise enough for one of these to be used in place of a servo or stepper in a cnc 4th axis. Really can't find anyone using these for anything other than a varying modes of transportation. Could bldc hub motors have the potential to be used in a cnc, or are steppers/servos the only way to go?
Well, the sensor on these motors is basically a simple three phase Hall Sensor (tri hall sensors 120 degrees out of phase). Unfortunately, that only gives you 60 degrees worth of resolution. You can still drive them like steppers, but they would be 3 phase steppers, as opposed to bipolar steppers. This means you would need to apply 3 sine waves with current regulation. Whereas for bipolar motors that is piece of cake, for three phase PMSM motors it is not. It is doable, but it will not be simple. For a fourth axis, however, if you add a better encoder, it would be some kickass implementation! The problem will be adding the sensor, as this motor is in essence backwards... But I am positive it can be done!
Thanks for your in depth reply! I'm learning more and more on bldc motors everyday. I'm currently sourcing the parts to make a modular, magswitch-locking table saw/shaper powerfeed using one hoverboard motor, and everyday I grow a bit wiser in my approach from videos and correspondence from people like yourself. Keep churning out this great content. P.S. I'm really curious if you could smooth face the front of that hub motor on the lathe (or maybe the cooler option of just using the hub's own motion while clamping the spindle!) as per the extra thickness of material located there. From there, maybe you could drill/countersink/tap a bolt pattern from the inside-out to attach a small 4 jaw chuck or may even an array of windmill blades. Would probably have to utilize some nonferrous fasteners as to not interfere with the magnetic field. Let me know what you think of this idea.
On the end of the shaft (outside of the motor), the bore measures 0.3" or around 7.6 mm. Inside of the motor, however, it is a tricker matter as the hole was drilled at an angle. From the top it looks like an oval. It measures something in the 3.3" or 8.3 mm range. Hope the info helps!
I have and love junk too. People are always saying you have to much junk. You can NEVER have too much junk! Like you said. They see junk. We see potential!
Thanks for watching! I will admit, however, that lately I have been a tad overwhelmed with the sheer amount of junk accumulation I have undergone, so I am seriously reconsidering my claim. Nah, maybe next month... heh heh
This is just what i was looking for. Looks like I need to find a buddy with a press.. plan on putting a shaft from a Jetson bike in mine the old one is rusted to death and this hoverboard motor is exactly similar minus the short shaft..
Glad the content was able to help. Good luck with your project!
Nice video. Do you know how thick the decorative face of the motor is (the face facing out when you have it mounted on the lathe)? I either want to lathe off the decorative part so I have a planar surface for mounting something, or, possible leave the decoration on and just screw into the face there to mount something. Although I suspect I need to face it off somewhat since I doubt that face if very planar/flat.
I think I know what you mean. If I were to face off the spokes (at least for this particular motor) I would end up with about 3 mm worth of material. Not sure what you want to screw in, but maybe it would make sense to TIG weld a plate to add some thickness. Way easier than milling a negative of the decoration to weld in place, albeit another option that I can think of. Good luck with your project and thanks for watching!
@@CNCDude thanks for the reply. 3mm is probably too thin to do much with. I could press the face into casting sand and pour aluminum in to make a fitting plate without milling. Or braze a plate on (I can't really TIG, yet) using some of that aluminum brazing rod, although I never had much luck with that in the past.
im harvesting magnets and looking into this for future teardown
its not a pile of junk its a pile of tools, projects
I may have missed it if you mentioned but what are you planning to use the motor for? Is R2D2 renovation in the plans!
Ha! Well, you didn't miss it because I didn't give it away. But I guess it was just too obvious, heh heh heh.
Yup! The plan is to change the shaft so I can fit it inside of the R2D2 "shoe-box" compartment. You know, in essence I should be able to use it as it is, but seems easier to interface with two pegs instead of one. There is really not a lot of room inside of R2D2's feet...
Thanks for watching!
I've been wondering if the sensoring on these motors is precise enough for one of these to be used in place of a servo or stepper in a cnc 4th axis. Really can't find anyone using these for anything other than a varying modes of transportation. Could bldc hub motors have the potential to be used in a cnc, or are steppers/servos the only way to go?
Well, the sensor on these motors is basically a simple three phase Hall Sensor (tri hall sensors 120 degrees out of phase). Unfortunately, that only gives you 60 degrees worth of resolution. You can still drive them like steppers, but they would be 3 phase steppers, as opposed to bipolar steppers. This means you would need to apply 3 sine waves with current regulation. Whereas for bipolar motors that is piece of cake, for three phase PMSM motors it is not. It is doable, but it will not be simple. For a fourth axis, however, if you add a better encoder, it would be some kickass implementation! The problem will be adding the sensor, as this motor is in essence backwards... But I am positive it can be done!
Thanks for your in depth reply! I'm learning more and more on bldc motors everyday. I'm currently sourcing the parts to make a modular, magswitch-locking table saw/shaper powerfeed using one hoverboard motor, and everyday I grow a bit wiser in my approach from videos and correspondence from people like yourself. Keep churning out this great content.
P.S. I'm really curious if you could smooth face the front of that hub motor on the lathe (or maybe the cooler option of just using the hub's own motion while clamping the spindle!) as per the extra thickness of material located there. From there, maybe you could drill/countersink/tap a bolt pattern from the inside-out to attach a small 4 jaw chuck or may even an array of windmill blades. Would probably have to utilize some nonferrous fasteners as to not interfere with the magnetic field. Let me know what you think of this idea.
What is the inside diameter the hole that the wires come out of?
On the end of the shaft (outside of the motor), the bore measures 0.3" or around 7.6 mm. Inside of the motor, however, it is a tricker matter as the hole was drilled at an angle. From the top it looks like an oval. It measures something in the 3.3" or 8.3 mm range. Hope the info helps!