Gamma 2.0 - Printed in Place RC Car

Build Guide: https://youtu.be/X2ae7fGiUiQ

Last Updated: August 1, 2023 (See notes below)

This is a printed-in-place rc car. The frame, axle, steering and wheels are all printed together.
No supports or screws needed.

1/28 and 1/32 scale. 98mm and 80mm wheelbase.
3 different bodies and tires included.

This model was designed to print on a stock Ender 3 Pro.

**Please follow the settings instructions carefully before printing.

ITEMS NEEDED:
-3.7 gram servo
-1 or 2 cell lipo battery (and charger)
-130 size electric motor, brushed or brushless
-receiver/remote
-15-30amp speed control, brushed or brushless
-0.5 modulus 8 tooth pinion

OPTIONAL:
-5 m2 screws for body clips and steering (NOT needed if you use the included bodies and servo arm)

-Tires (NOT needed if you use the included tires)
For 1/28: inner diameter 20mm
For 1/32: inner diameter 18mm

Instagram: https://www.instagram.com/underengineered_1077/

Youtube channel: https://www.youtube.com/channel/UCUt46baUhf-O4a2VVOzDRmw

PiP Racers Facebook group: https://www.facebook.com/groups/531616299013281

UPDATES:

August 1, 2023

• Included a servo arm. It replaces the screw needed for steering.
  Now the gamma 2 can be built without any screws (besides the tiny one that comes with the servo).

• Lowered the gear to its original position. The raised gear was causing the wheel to print off center. Lowering it back down will reduce the chance of a wobbly wheel.
  If you prefer the raised gear version, you can find it in the archive folder, marked as V3.

July 7, 2023
- Added "Testy.stl": a small cart to test your settings before printing the entire car.
- Added body clips directly to the chassis. Screws are no longer needed to mount the included bodies.
- Redesigned upper rims to reduce sagging and warping.
- Thickened rear axle to increases durability
- Added an archive folder with all the previous versions of the Gamma 2.

February 5, 2023
- Added 2 new versions: Gamma 32 and Gamma R.
- GAMMA 32: 1/32 scale version. 80mm wheelbase. I've included body clips for Tamiya Mini4wd bodies.
- GAMMA R: The gear has been moved up the axle to reduce steering bias. This version drives better, but is a little more fragile. Reinforcing the rear axle with a 2mm metal rod is recommended.
- Added caster to the front end to improve steering.
- Made minor edits to improve overall strength.

September 12, 2022
-Gear has been changed for better torque and less stress on the motor
-Servo mount added to the chassis
-Servo arm no longer needed
-Increased rim diameter (and tires). Works better with Kyosho Mini Z tires
-NEW BODY!! Introducing the sleek and sporty Butthead!
Yes..that's actually what i named it. =)

IMPORTANT

Please refer to image titled "CHECK BEFORE PRINTING.jpg". Your slicer preview must show the circled structures (under the top front wheel). If they do not appear, then you will need to adjust your slicer settings.

NOZZLE SIZE

0.4mm
!! Larger nozzle size will NOT work
!! Smaller nozzle size will work

LAYER HEIGHT

0.2mm
!! Larger layer height will NOT work
!! Smaller layer height will work

SUGGESTED NOZZLE TEMPERATURE

PLA: 199-203
PETG: 235

BED TEMPERATURE

PLA: 60
PETG: 60

SPEED

PLA: 50mm/s
PETG: 35mm/s
!! I do not recommend printing faster than this. It has tight tolerances. Printing too fast will cause the wheels to fuse and not spin.

COOLING FAN

PLA: 100%
PETG: 50%

INFILL

20-60%
!! I usually do 25%

BRIM

Not necessary, but can be added if it's having trouble sticking to your print bed.

SUPPORTS

No

RAFT

No

IS IT RESIZABLE?

LARGER - yes, easily. If you make it 150% or larger, you can even use 0.3 layer height. You will need to find suitable screws and motor.
SMALLER - ONLY if you reduce nozzle size. You can print it at 75% if you use a 0.3 nozzle and a layer height of 0.15. This will make sure that all the supports print to scale.