Magnum Seed | Rayne Demonseed 44 | 78mm Venom Magnum [Serious]

Magnum Seed

an LEV build by b264

click to animate

This build has been in some sort of “done” state for a few months now, but I’ve been tweaking things and I think this may be close to the final form.

The first iteration had 63mm motors but that just didn’t work with the 78mm wheels no matter how I arranged it. I’ve got the motor can ground clearance up to 31mm from 8mm in the first iteration, helped greatly by the switch to 50mm motors.

So what’s my favorite thing about this board?

That’s definitely the ride. It rides like a downhill longboard. It also leans over REALLY far. I can make a complete U-turn within normal lane markings (12’ / 365cm around here) which is almost scraping the enclosure on the ground. For not having a tail, that’s important to me. This can even make 90° turns inside hallways in high-rises.

Also water. This was my first experiment with butyl tape and it’s wonderful stuff. I didn’t even waterproof the inside, and this is the board I grab when it’s raining. Butyl tape is a magical thing.

What’s in it

The heart and soul of this build is its deck and wheels. That’d be the impossible-to-source Rayne Demonseed 44" deck (Satanic Panda variant) and Venom Magnum dongs, 74A.

Parts list (source)

  • Rayne Demonseed 44" Satanic Panda deck (ENPM)
  • Venom Magnum Mach 1 78mm 74A 70CP wheels (ENPM)
  • Bear 52° RKP front truck (ENPM)
  • Caliber 44° rear baseplate (ENPM)
  • @Boardnamics 220mm rear hanger (ENPM)
  • Boardnamics 50mm motor mounts and precision clamps (ENPM)
  • stock Rayne griptape (for now?) (ENPM)
  • Bones Reds bearings (Amazon)
  • @glyphiks enclosure (ENPM)
  • Riser lights from Metroboard, “2W” model, white and red colors (Metroboard)
  • custom 10S6P semi-flexible 30Q battery by @b264 (recycled from an older build)
  • @torqueboards TB6 ESC (esk8.news)
  • enertion VESC-X ESC (ENPM)
  • @moon Magnum pulleys, 33T variant (ENPM)
  • Racerstar 200Kv 5065 motors (ENPM)
  • Mini Remote (ENPM)
  • metr Pro, PCB version (ENPM)
  • NRF51822 bluetooth module (ENPM)
  • @3DServisas Fatboy X Plates (ENPM)

This entire build was sourced from the esk8.news Parts Market (ENPM), Amazon, and AliExpress, except the riser lights, which came from Metroboard, and the fishpaper, which came from 145ptags

It’s got two charge ports, a 5.5mm x 2.1mm barrel jack (Amazon) on a 10A fuse – and a Reverse 5.5mm x 2.5mm Bird/Lime/Segway style charge port (AliExpress) on a 10A fuse. Yes, you can charge it with a Lime scooter charger. And a Metroboard/Evolve/enertion charger. Simultaneously, if desired :crazy_face:

Enough with the words, and in with the photos.

the Magnum Seed     click to play ►

That tiny XT30 loopkey on the front of the enclosure turns off the lighting system (when pulled) for Stealth / Max Range mode.

the ass-end

the control panel

overhead view

the Stealth Mode key

the goodness of MR60 connectors and epoxy

And yes, those two XT30 plugs that are partly unplugged, they do that everytime I push them in, so I just leave them that way now. They have never come unplugged. If they do, I will redesign that part. (likely means putting a toothpick inside shrinkwrap around the wire) These pics are right after a ride and how the board looks in Real Life :tm: and not marketing materials.

When this one gets dirty I just hose it off in the car wash.

lean

lean

nose lighting

tail lighting

more angles

that’s a voltmeter you can see through the enclosure

glyphiks enclosure goodness

Rayne factory griptape, which might be short-lived

the BMS, with a little coercion in-progress

the remote

40 Likes

Shoutouts

If I forgot someone or my memory is wrong, please let me know

@whaddys for the Bear trucks

@glyphiks for the awesome enclosure

@KaramQ for the unobtainium deck

@torqueboards for the awesome ESC

@mmaner for the motors

@Boardnamics for the truck hangers

@J0ker for the motor mounts

@Brently for the pulleys

@Reelop19 for the wheels

@thisguyhere for the metr

@Scepterr for the BLE module

@Agressivstreetlamp for the BMS

19 Likes

this section is for me

for my records

Are you b264?

Yes

Are you sure?

I'm sure

:crazy_face: I don’t believe you.

.
## Magnum Seed VESC settings

R: TB6 version V6.65-B1.4  SLAVE id0 nrf51822 {redacted}
L: FOCBOX 1.3 MASTER id1 Metr Pro PIN {redacted}

VESC Tool 3.00.beta with added custom commits
Firmware 5.2.beta.12 with added custom commits
R: VESC Firmware 5.2, Hardware: 60, UUID: {redacted}
L: VESC Firmware 5.2, Hardware: 410, UUID: {redacted}

R: Racerstar 5065 200kV
L: Racerstar 5065 200kV

mode: FOC HFI, FOC unsensored

per ESC:
motor current max 46A
motor current min -45A
battery current max 22A
battery current min -15A
absolute maximum current 150A

battery: 10S6P 30Q 55A 18000mAh

throttle curve
20%
-5%
polynomial
7% deadband RIGHT
8% deadband LEFT

R: 1.055ms, 1.885ms, 1.528ms
L: 1.125ms, 1.955ms, 1.591ms

max wattage 1.5MW
min wattage -1.5MW

voltage cutoff
L: start 36V end 31V
R: start 36V end 31V
BMS hard cutoff: none

Racerstar 5065 200kV LEFT
Cycle Integrator Limit: 130.47
BEMF Coupling: 925.16
I: 42.83A
R: 32.70mΩ
L: 10.04μH
λ: 4.03mWb
HFI samples: 16
HFI Start Voltage: 20.00V
HFI Run Voltage: 4.00V
HFI Max Voltage: 10.00V
Sensorless ERPM HFI: 2000.00
HFI Start Samples: 65
HFI Observer Override Time: 1.0ms

Racerstar 5065 200kV RIGHT
Cycle Integrator Limit: 132.07
BEMF Coupling: 925.29
I: 45.03A
R: 29.60mΩ
L: 10.26μH
λ: 4.26mWb
HFI samples: 16
HFI Start Voltage: 20.00V
HFI Run Voltage: 4.00V
HFI Max Voltage: 10.00V
Sensorless ERPM HFI: 2000.00
HFI Start Samples: 65
HFI Observer Override Time: 1.0ms

Control Mode: Current Hyst Reverse With Brake

max 100000 erpm
min -100000 erpm
erpm limit start 80%
Fault Stop Time 85ms
Duty Cycle Current Limit Start 85%

9.00V lighting circuit

No

this section is for my records

cheers :beers:

12 Likes

The innards before the TB6 was added when one of the VESC-X popped a DRV
the intentional uneven hole spacing is highlighted

The BMS also ate shit and had to be replaced, then the replacement was being a pain in the ass and needed some coercion

An ESC upgrade to @torqueboards TB6 on one side

painting the front light so it’s not shining in my face


The first iteration had two enertion VESC-X aka FOCBOX 1.3


early version had 63mm motors


early version had a bright white light shining in your face at night

@moon pulleys, modified

enclosure mock-up

By the way, a 16S5P (18650 only) fits perfectly in the @glyphiks Demonseed 44 enclosure. I just happened to have a 10S6P laying around. But if not, I’d have put a 16S5P in there. You can see the amounts of extra space on each side of the battery.

I’d considered using VESC6 but they wouldn’t fit. (Which is the same reason why there’s only one TB6 and not two in there)

13 Likes

Love the build and always Brian!

You should slap one of your heatsinks on those tb escs!

2 Likes

Malicious content! Delete it!

Awesome build!

2 Likes

Unfortunately this build predates the InfinitySink, I’ve just been slowly tweaking it since @abusfullofnuns was in town. He saw the very first iteration on 2020 July 27 when it was born and saw its first tarmac…

2 Likes

Finally! Sweet build thread, glad to see it!

2 Likes

I’ve gotten 23.9mi / 38.5km from this

This is the new preferred medium-haul vehicle in my fleet. For short or long trips, I usually grab a different vehicle. For medium trips or if it’s raining or wet, this is my typical grab.

2 Likes

Board looks great man! Great to see this deck built out, it’s unobtanium until the new ones get done and even then… Not the same.

5 Likes

Word on the street is Rayne ghosted again.

I’ll believe that new Demonseed 44 decks exist once I see photos of them LoL

And if so, I’ll need another enclosure right away! :crazy_face:

4 Likes

Yeah. I also heard the same word :expressionless: disappointment level is high.

1 Like

I followed up with them about this yesterday on IG, whoever runs their handle says its still coming “very soon”. So I’m still checking their site everyday.

Also nice build man! makes me wana throw some small wheels on my K. Rimes

2 Likes

just curious, how much was shipping from aus for the enclosure?

AUD 49.80

local currency

1 Like

Price would be x3 the other way around :rofl:
OZPS > USPS

3 Likes

Awww hell yeah @b264, so happy to see those trucks made it onto this badass build! I’m gonna have to try out this butyl tape

1 Like

I like the 52° angle, especially with this long deck. I almost went 50°/50° instead of 52°/44°.

52°/48° I think would be ideal but I don’t know of any Caliber2 compatible 48° baseplates.

1 Like

This build is incredible. I’m using the same motors and attempting to waterproof my enclosure as well. My question for you is how was setting up HFI? My sensors came broken from the factory (kinda knew that they would) and I never got HFI to work without a little bit of flipping when I move the motors by hand.
I hope this isn’t too off-topic but I’d love to model parts of my personal build after what you have going on here. Also, I love how you have the voltmeter going through the enclosure! :joy:

2 Likes

These motors are notorious for getting hot.

HFI is notorious for changing when the motors get hot. This makes it not tuned anymore.

So that means once the motors get hot, the HFI doesn’t work as well anymore. But it does still work. Kinda. I’m actually running FOC/unsensored on one side and FOC/HFI on the other side. I had issues tuning it, but in the end I kept landing on the default values 20/4/10:

Racerstar 5065 200kV LEFT
Cycle Integrator Limit: 130.47
BEMF Coupling: 925.16
I: 42.83A
R: 32.70mΩ
L: 10.04μH
λ: 4.03mWb
HFI samples: 16
HFI Start Voltage: 20.00V
HFI Run Voltage: 4.00V
HFI Max Voltage: 10.00V
Sensorless ERPM HFI: 2000.00
HFI Start Samples: 65
HFI Observer Override Time: 1.0ms

Racerstar 5065 200kV RIGHT
Cycle Integrator Limit: 132.07
BEMF Coupling: 925.29
I: 45.03A
R: 29.60mΩ
L: 10.26μH
λ: 4.26mWb
HFI samples: 16
HFI Start Voltage: 20.00V
HFI Run Voltage: 4.00V
HFI Max Voltage: 10.00V
Sensorless ERPM HFI: 2000.00
HFI Start Samples: 65
HFI Observer Override Time: 1.0ms
1 Like