How to print a remote control car using a 3D printer

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/ 2019-08-16 / News

Step 1: Materials List

Electronics

< p style="text-indent: 2em;">1 brushless motor and ESC

1 servo motor

Very important is that it has a star speaker

1 three-channel transmitter and receiver

1 LiPo Battery

optional

1SwitchClose

Lights

PLA

TPU

ABS (if necessary)

Other

4 10-24 screws or 4 M4 screws

4-6 (depending on the gearbox) 608zz bearing

These are the same bearings as the skateboard standard.

propelleradapter

You should check if your motor has them.

Hammer

Soldering soldering iron

Bullet Connector

Step 2: Turn to Assembly

How Use a 3D printer to print a remote control car

打印前机箱。

Print Settings:

0.3 mm layer height

215 C

30% fill

Place the servo motor into the hole.

It may be necessary to trim the outer casing of some servo motors.

Print two front wheel bearing brackets.

Print settings:

0.3 mm layer height

215 C

10% fill

Print two front axles.

Print settings:

0.1 mm layer height

215 C

100% fill

20 mm/s print Speed

筏 without heated bed

Place a bearing on each axis.

Push the bearing and shaft firmly into the front wheel bearing housing and set aside.

Print the gearbox of your choice.

Print settings:

0.2 mm layer height

215 C

25% fill

筏< /p>

Support only touch backplane

1.5 mm wall

Install the front chassis into the gearbox in the bottom slot.

You may need to clean the holes and use a hammer to secure the front chassis.

< p style="text-indent: 2em;">should be a tights

align the holes in the front and front wheel bearing brackets and pass the screws through the bottom

You may need to place a nut or hot rubber ring around the screw to prevent it from slipping out. Remember, the car has a lot of vibration. >.

Print the steering arm.

Steering arm and steering arm used in the Flutter Scout The same. I chose to do this because it worked very well and didn't change anything. I got written permission from the designer.

Print settings:

0.3 mm layer height

215 C

10% fill

star The servo speaker is placed on the servo motor.

Then place the car and invert it.

Position the steering arm on it and engage the servo horn so that the hole aligns with the hole in the front wheel bearing.

Pull the screw through the bottom.

Again,It may be necessary to place a nut or hot rubber ring around the screw to prevent it from slipping out. Remember that the car has a lot of vibration.

The front chassis assembly has been completed.

Step 3: Spur Gearbox

< p style="text-indent: 2em;">This gearbox is easy to assemble and requires four bearings.

All parts are provided below. Rear axle and others The rear axle used in the gearbox is the same.

1:10 gear ratio has A gear

fast but may need to push

>

1:20 gear ratio has B gear

not tested /p>

First screw the metal motor bracket onto the brushless motor. It is X-shaped and helps keep the motor in place.

Print a 5-tooth spur gear.

Print settings:

0.3 mm layer height

215 C

100% fill

find the propeller adapter and fix the ring and Place the 5-tooth spur gear on top.

Fix the adapter to the motor by tightening the nut.

Place the motor in the slot on the side of the gearbox.

Find the previously printed raft or thin cardboard or wood. Cut the 筏 to make them Fits the slot, but is still detachable.

You may need to use more than one to ensure the motor is safe. If you use more than one, I recommend sticking them hot Together.

Print the middle shaft, 22-tooth large gear and A1 or B1 spur gear.

Axis print settings:

0.3 mm layer height

215 C

100% fill

筏< /p>

30 mm/s print speed

Gear print settings:

0.3 mm layer height

215 C

100% fill

If time is a constraint:

50% fill

3 mm walls

These will wear out faster, but are good for testing.

You should be able to press the two gears onto the shaft.

You may need to use a hammer or widen the gear Hole in. However, the gear needs to fit tightly on the shaft.

If the gear is loose, print the scaled version of the axis.

I plan to design a notch and clip that holds the shaft in place.But before that, I recommend thermally bonding gears and shafts at low temperatures (compatible with ABS or PLA) or with super glue (compatible with PLA). If you want to change gears, the hot glue should be peeled off and the super glue can be dissolved in acetone.

Place a bearing on either side of the shaft.

Separate the gearbox and place the shaft in the hole closest to the motor.

Print the A2 or B2 spur gear and rear axle.

Axis print settings:

0.3 mm layer height

215 C

100% fill

support touch backplane

30 mm/s print speed

Gear print settings:

0.3 mm layer height

215 C

100% fill

If time is a constraint:

50% fill

3 mm walls

These will wear out faster, but are good for testing.

Fix the 50-tooth spur gear to the rear axle in the same steps as the center shaft.

Place the bearings on both sides of the shaft.

Expand the gearbox and place the shaft in the hole furthest from the motor.

Step 4: Worm gearbox

This gearbox is more difficult to assemble. It has a 60:1 gear ratio and the gears have been modified in the McMaster-Carr component library on Autodesk Fusion 360.

All parts are below, the rear and rear axles are the same. Other gearboxes.

First screw the X-shaped metal motor bracket onto the brushless motor.

Print 30-tooth gears and rear axles.

Axis print settings:

0.3 mm layer height

215 C

100% fill

筏< /p>

Support Touch Backplane

30 mm/s Print Speed

Gear print settings:

0.3 mm layer height

215 C

100% fill

If time is a constraint:

50% fill

3 mm wall

these will wear out faster , but is good for testing.

Pressure that the 30-tooth gear is mounted on the rear axle.

If the gear hole is tight, it may be necessary to widen the gear hole. If it is loose,The rear axle should be scaled up to fit. You should use a hammer to fit the gear.

You should heat the gears in place at low temperatures (if using PLA or ABS) or use super glue (only when using PLA). The super glue can then be dissolved in acetone to remove the hot glue. If the hot glue is too hot, it will melt the gear or shaft, making the disassembly more difficult.

Place the bearings on either side of the shaft.

Print the worm gear.

Print settings:

0.1 mm layer height

215 C

100% fill

Support everywhere

30 mm/s print speed

If you have 2 extruders and easy to dissolve support filaments I Encourage you to use it.

Thoroughly clean the support of the worm gear.

It needs to be placed flat Fixed on the ring and easily meshed with the 30-toothed gear.

Locate the propeller adapter and place the retaining ring and the worm gear on it.

To ensure the correct fit between the worm gear and the 30-tooth gear,You may need to add a spacer to move the worm gear up the propeller adapter.

Place the propeller adapter on the motor shaft and tighten the nut to secure the worm gear.

Place the motor with the worm gear in the gearbox in the front slot.

Cut a raft or cardboard or plank to fit the slot.

If you use more than stick them together for easy disassembly.

The jaws should be approximately 5 mm taller than the gearbox to remove them if necessary.

Expand the rear gearbox and position the rear axle.

I know the picture is upside down, whenever I upload it,It will flip.

Step 5: Electronic Devices

Connect

Find brushless motor.

welding male connector on red and black wires. Weld the female connector on the yellow wire.

Make sure to place heat shrink tubing at the junction to isolate them.

Yellowwire Only plug the corresponding wires on the ESC. When replacing the wires, insert the red and black wires to change the direction of the motor.

Use the three wires of the same size to find the ESC and Side.

Mold the female connector on two horizontal lines. Solder the male connector to the intermediate connector.

Make sure to place heat shrink tubing at the joint to isolate them. There should be no metal display when inserting.

Find the other side of the ESC.

A male connector on the red wire and a female connector on the black wire.

If you want to add a switch, solder the red wire to the switch. Then, solder another red wire to the other side of the switch and connect the bullet connector.

Ensure heat shrinkage to insulate the wires.

Find battery.

Wel a male connector on the red and black wires of the female connector.

Ensure that the connection is insulated with a heat-shrink tubing and that metal should not be displayed when inserted.

Insert the wires on the ESC into the appropriate motor wires.

Receiver

Find the receiver, servo motor and ESC.

In the channel-plug of the servo motor, the negative pole (possibly brown or black) faces the outside of the receiver.

Insert the ESC servo line in channel 2 with the negative side facing outward.

Step 6: Test

It is easier to test a car without wheels.

Support the car so that the steering components and gears don't touch anything.

Open the transmitter.

Insert the battery and turn on the car.

After turning on the car, the servo motor should be centered immediately.

If the wheel is not facing upwards after centering, the following steps should be taken. /p>

Remove the servo horn from the servo motor while the car is still open.

will The wheel is held in the forward position.

Return the servo horn back to the servo motor to keep the wheel straight.

Press the throttle slowly to make the shaft start to rotate.

If a spur gear is selected, the motor should be able to rotate the gearbox smoothly.

If you have selected a worm gearbox, Please keep the throttle fully open so that the motor runs at full speed.

The motor will eventually wear out after running for a while.

If the worm gear is not fully meshed with a 30-toothed gear, reposition the motor and heat it into place or use more jaws.

If you If you have any other questions, I will try my best to respond in a timely manner. It would be easier if you also attached a video showing the problem.

Step 7: Wheels

Printing and installing wheels is very simple.

The wheels are mounted below.

Print two front wheels and two rear wheels.

The rear wheel is significantly larger than the front wheel to maintain the vehicle level.

All wheel print settings:

TPU or other flexible filament

0.3 mm layer height

215 C

100% fill

Pressure attaches the rear wheel to the rear axle.

The square should ensure that the wheels do not slide on the axle.

If you feel it is necessary,Pins or M4 screws can be used to further secure the wheel.

Pressure the front wheel to the front axle.

If you feel it is necessary, put a clip on it. The end of the shaft is used to secure the wheel.

Step 8: Final Remarks

I think the car I designed has improved Many features of my brother.

There is a three-sided gearbox for easy placement of shafts and larger gears. It also remains strong considering the opposing forces generated by the axle and the front chassis.

The fragile steering pin has been replaced with a screw.

The wheel uses full 3D printing,Built-in suspension.

You can easily change the drive.

In general, there are fewer components assembled and assembled.

The front case and its connection to the gearbox are very powerful.

But there are some places where my car is not enough.

Some parts are difficult to assemble and require a hammer or material removal.

Some parts need to be glued together instead of being fixed with grooves and clips.

Electronic components have no place.

The worm gearbox has the problem of jamming and keeping the gears intermeshing.

It uses parts that are not as accessible as the propeller adapter.

< p style="text-indent: 2em;">Some tires need to be placed around them to get enough traction.

The worm gearbox accelerates very slowly and seems to be difficult to start. However, it started quite smoothly after the start.

The worm wheel slipped a lot.

< p style="text-indent: 2em;">The current tires are not suitable for grass or ice.

The spur gearbox sometimes needs to be pushed to start

The spur gearbox is sometimes out of control.

Working in progress

I am making a body for it, it will be placed In the top slot on the side that is connected to the front chassis.

I am designing my own steering arm and will update the steering gear by August.

I plan to design a low-speed gearbox that allows for smaller tires.

I will create some new tire designs to better suit the road.

I am drafting a new guide on how I design my car.

I would love to see photos of the people they printed and any suggestions for modifying the car or helping me with what I have now.I am also very grateful for the creation of new modules, which may allow for better processing or faster speeds. I really want to know what kind of body design is also true.

I will upload the technical drawings to this step after completion so that people can modify and create their own modules.

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