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Brushless Stryfe

No Shell Cutting Required

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#1 Remzak

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Posted 16 February 2016 - 10:59 PM

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I had some brushless motors lying around so I decided to make my stryfe run on three phase AC. The motors I used are DYS 1806 2300 kv motors, which have a 2mm shaft and can run on 2-4S lipos. I also set them up with one 30 amp speed control, and an arduino using a potentiometer to control motor speed. The velocity on a 3S lipo exceeds 100 feet per second and the motors run almost silently. I will have more updates as the project moves on, but I have only completed preliminary velocity tests on 3 cells. I still need to figure out a way to house the arduino.
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The test circuit for the electronics
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Arduino pin outs
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I am running two motors with one ESC
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The code, just converting the potentiometer value into a PWM signal
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A picture of the homemade flywheel cage installation
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Close up of the motor mount I made from aluminum sheet
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Last picture before I closed it
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#2 Nerfguy2002

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Posted 16 February 2016 - 11:33 PM

How hard is it to make your own flywheel cage , I need one for a project but I don't want to gut a good gun. I guess I would have to get measurements of a cage but then all I would need is flywheels. I could get them from Worker.


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#3 beaker only

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Posted 17 February 2016 - 02:01 AM

As far as housing. A shell integration might work. Firefly, raven, centurion. Would give you ample room to house and protect the board. This seams like an interesting project. Once its further in the process I would totally want to see a firing demo.


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#4 DjOnslaught

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Posted 17 February 2016 - 06:55 AM

I dunno where your gonna fit a uno inside a stryfe. There's barely room for a mini or nano inside one
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#5 Remzak

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Posted 17 February 2016 - 09:28 AM

How hard is it to make your own flywheel cage , I need one for a project but I don't want to gut a good gun. I guess I would have to get measurements of a cage but then all I would need is flywheels. I could get them from Worker.


It is almost cheaper to buy a stryfe off amazon and gut it than it is to buy worker flywheels and have them shipped. It will also save you time.
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#6 Agles

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Posted 17 February 2016 - 09:38 AM

looks nice and clean. big question, hows it shot?


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#7 Remzak

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Posted 17 February 2016 - 09:42 AM

The velocity on a 3S lipo exceeds 100 feet per second and the motors run almost silently.


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#8 Nerfguy2002

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Posted 17 February 2016 - 10:57 AM

It is almost cheaper to buy a stryfe off amazon and gut it than it is to buy worker flywheels and have them shipped. It will also save you time.

See, that the problem, my mom hates nerf and won't let me buy another one, so I kinda have to make my own.


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#9 shmmee

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Posted 17 February 2016 - 12:23 PM

How's the spin up time compared to our usual modified motors? Does this grant any boost to ROF?


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#10 Remzak

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Posted 17 February 2016 - 12:24 PM

Making a flywheel cage isn't easy. It will be much harder with brushed motors.

The spinup time is actually slower, but they are so quiet I would feel very comfortable keeping them running. When I say quiet, I mean quiet. They are almost silent. I could not get the motors to slow down, even when finger banking at almost 8 darts per second.

Edited by Remzak, 17 February 2016 - 12:27 PM.

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#11 DjOnslaught

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Posted 17 February 2016 - 12:34 PM

Making a flywheel cage isn't easy. It will be much harder with brushed motors.

The spinup time is actually slower, but they are so quiet I would feel very comfortable keeping them running. When I say quiet, I mean quiet. They are almost silent. I could not get the motors to slow down, even when finger banking at almost 8 darts per second.


That's extremely impressive, I'm curious how your utilizing the potentiometer in this case and if that isn't having bearing on it since the motors might be louder at full speed without any control
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#12 Remzak

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Posted 17 February 2016 - 12:39 PM

I am converting the value from the potentiometer into a PWM signal the speed control can understand. The speed control is calibrated for the motors, which helps to have a good sync and decrease noise. The bearings used in brushless motors and the lack of brushes also contribute to how quiet they are.

Edit: I will post the code today

Edited by Remzak, 17 February 2016 - 12:40 PM.

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#13 shandsgator8

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Posted 17 February 2016 - 01:33 PM

This is cool stuff. Thanks for sharing, Remzak!


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