Project LiftOff: Difference between revisions

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(Several details, improved accuracy for new revision. -Andrew)
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Project LiftOff is a 3lbs MeltyBrain (a robot that moves using translations drift as its entire body spins at 1000 to 3000 RPM.
Project Liftoff is a 3lbs MeltyBrain (a robot that moves using translations drift as its entire body spins at 1000 to 3000 RPM.


Checkout some drifting videos: https://www.youtube.com/playlist?list=PLU5LoDPIq_JcuVjNkIasXdblbYT3sTSFN
Checkout some drifting videos: https://www.youtube.com/playlist?list=PLU5LoDPIq_JcuVjNkIasXdblbYT3sTSFN


For 2021, Project LiftOff is beginning its third major revision.
For 2021, Project Liftoff is beginning its third major revision.
[[File:Project Liftoff a March-2019.jpg|alt=|thumb|Project LiftOff - March 2019 (rev 1.0)]]
[[File:Project Liftoff a March-2019.jpg|alt=|thumb|Project Liftoff - March 2019 (rev 1.0)]]
* Rev-1.0 : March 2019
* Rev-1.0 : March 2019
** Processor: Arduino Nano
** Processor: Arduino Nano
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** switched from 8" Aluminum rings to 9" AR-500 ring with tooth (and hand cut HDPE)
** switched from 8" Aluminum rings to 9" AR-500 ring with tooth (and hand cut HDPE)
*** this AR-500 tooth proved to be too pointed and became embedded in arena wall several times
*** this AR-500 tooth proved to be too pointed and became embedded in arena wall several times
[[File:Project LiftOff b May-2019.jpg|alt=|thumb|Project LiftOff - May 2019 (rev 1.1)]]
[[File:Project LiftOff b May-2019.jpg|alt=|thumb|Project Liftoff - May 2019 (rev 1.1)]]
[[File:Project LiftOff c Aug-2019.jpg|alt=|thumb|Project LiftOff - August 2019 (rev 1.2)]]
[[File:Project LiftOff c Aug-2019.jpg|alt=|thumb|Project Liftoff - August 2019 (rev 1.2)]]
[[File:Project LiftOff d2 Sir Pops Alot Aug-2019.jpg|alt=|thumb|Project LiftOff - August 2019 (rev 1.15)]]
[[File:Project LiftOff d2 Sir Pops Alot Aug-2019.jpg|alt=|thumb|Sir Pops A Lot (derivative) - August 2019 (rev 1.15)]]
* Rev-2.0 : 2020
* Rev-2.0 : 2020
** Processor: Teensy 4.0
** Processor: Teensy 4.0
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** CNC'd HDPE body
** CNC'd HDPE body
** New 8" AR-500 ring and tooth (with a more blunt tip)
** New 8" AR-500 ring and tooth (with a more blunt tip)
[[File:Project Liftoff July-2020.jpg|alt=|thumb|Project LiftOff - July 2020 (rev 2.0)]]
[[File:Project Liftoff July-2020.jpg|alt=|thumb|Project Liftoff - July 2020 (rev 2.0)]]
[[File:Project LiftOff f Flip n Cut July-2020.jpg|alt=|thumb|Project LiftOff - July 2020 (rev 2.05)]]
[[File:Project LiftOff f Flip n Cut July-2020.jpg|alt=|thumb|Flip N' Cut (derivative) - July 2020 (rev 2.05)]]
[[File:Project LiftOff g Sept-2020.jpg|alt=|thumb|Project LiftOff - September 2020 (rev 2.1)]]
[[File:Project LiftOff g Sept-2020.jpg|alt=|thumb|Project Liftoff - September 2020 (rev 2.1)]]
* Rev-3 : 2021 Same electronics as Rev-2; improved algorithm, wheel orientation, and return to accelerometer.
* Rev-3 : 2021 Same electronics as Rev-2; improved algorithm, wheel orientation, and return to accelerometer.
** Processor: Teensy 4.0
** Processor: Teensy 4.0
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===Robot Facts===
===Robot Facts===
The first appearance was at the March 2019 NHRL event. The very first version used an 8" diameter aluminum pipe cut into two 1/2" thick slices with a notch cut out for the AR500 tooth (with two bolt holes).
The first appearance was at the March 2019 NHRL event. The very first version used an 8" diameter aluminum pipe cut into two 1/2" thick slices with a notch cut out for the AR500 tooth (with two bolt holes).

Since then, Liftoff has used several laser or waterjet-cut AR500 steel rings. These rings have been sandwiched or otherwise mounted to CNC'd UHMW or HDPE bodies that contain the primary electronics and battery. This has proven to be a durable, and adaptable construction method.


{| class="wikitable" style="width: 60%"
{| class="wikitable" style="width: 60%"
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|Body Material||HDPE (CNC) + AR500
|Body Material||HDPE (CNC) + AR500
|-
|-
|Weapon||Horizontal Body Spinner, 1360 grams
|Weapon||Meltybrain Spinner
|-
|-
|Weapon Drive||see below
|Weapon Drive||NA
|-
|-
|Drive||2 x FliteTest 2218 Brushless Motor, direct drive
|Drive||2 x DYS 2836 1100kv Brushless Motor, Fingertech Foam Wheels
|-
|-
|Power||2x4S 650mah LiPo
|Power||2x4S 650mah LiPo
|}
|}
T


==Tournament Results==
==Tournament Results==
====2020====
====2021====
{| class="wikitable" style="width: 60%"
{| class="wikitable" style="width: 60%"
|-
|-
|NHRL January||Did Not Compete
|NHRL January||Did Not Compete
|-
|-
|NHRL July 1||
|NHRL March||1W, 2L
|-
|-
|NHRL July 2||
|NHRL May||TBD
|-
|-
|NHRL September||
|NHRL July||TBD
|-
|-
|NHRL November||Did Not Compete
|NHRL September||TBD
|}
|}


Revision as of 22:58, 23 March 2021

Project Liftoff is a 3lbs MeltyBrain (a robot that moves using translations drift as its entire body spins at 1000 to 3000 RPM.

Checkout some drifting videos: https://www.youtube.com/playlist?list=PLU5LoDPIq_JcuVjNkIasXdblbYT3sTSFN

For 2021, Project Liftoff is beginning its third major revision.

Project Liftoff - March 2019 (rev 1.0)
  • Rev-1.0 : March 2019
    • Processor: Arduino Nano
    • Accelerometer: common MPU 6050 (+/- 16g 12 bits)
    • Receiver Interface: standard RC-PWM into UART
    • Motor Control: OneShot125 via PWM manipulation @ ~800Hz
    • External Sensors: none
  • Rev-1.1 May 2019
    • switched from 8" Aluminum rings to 9" AR-500 ring with tooth (and hand cut HDPE)
      • this AR-500 tooth proved to be too pointed and became embedded in arena wall several times
Project Liftoff - May 2019 (rev 1.1)
Project Liftoff - August 2019 (rev 1.2)
Sir Pops A Lot (derivative) - August 2019 (rev 1.15)
  • Rev-2.0 : 2020
    • Processor: Teensy 4.0
    • Accelerometer: none… used motor eRPM telemetry from ESCs via bidirectional dShot
    • Receiver Interface: RC-SBUS into UART
    • Motor Control: dShot600 via SPI manipulation @ 8000Hz
    • External Sensors: active IR
    • CNC'd HDPE body
    • New 8" AR-500 ring and tooth (with a more blunt tip)
Project Liftoff - July 2020 (rev 2.0)
Flip N' Cut (derivative) - July 2020 (rev 2.05)
Project Liftoff - September 2020 (rev 2.1)
  • Rev-3 : 2021 Same electronics as Rev-2; improved algorithm, wheel orientation, and return to accelerometer.
    • Processor: Teensy 4.0
    • Accelerometer: H3LIS331DL (+/- 400g 16 bits)
    • Receiver Interface: RC-SBUS into UART
    • Motor Control: dShot600 via SPI manipulation @ 8000Hz
    • External Sensors: active IR

Robot Facts

The first appearance was at the March 2019 NHRL event. The very first version used an 8" diameter aluminum pipe cut into two 1/2" thick slices with a notch cut out for the AR500 tooth (with two bolt holes).

Since then, Liftoff has used several laser or waterjet-cut AR500 steel rings. These rings have been sandwiched or otherwise mounted to CNC'd UHMW or HDPE bodies that contain the primary electronics and battery. This has proven to be a durable, and adaptable construction method.

Driver Andrew Kazmer (mostly) Jim Kazmer (sometimes)
Weight Class 3lb
Body Material HDPE (CNC) + AR500
Weapon Meltybrain Spinner
Weapon Drive NA
Drive 2 x DYS 2836 1100kv Brushless Motor, Fingertech Foam Wheels
Power 2x4S 650mah LiPo

Tournament Results

2021

NHRL January Did Not Compete
NHRL March 1W, 2L
NHRL May TBD
NHRL July TBD
NHRL September TBD
Changes being Considered
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