Build Guide - Model 1: Rancher 4x4
Version 1.1
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Rancher 4x4 – version 1.1 technical specs.
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Before you start
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Are you new to the Radio Controlled models?
Don’t worry, Radio Controlled (RC) models are not as complicated as they can look! However, it’s a good to know some basics before you will start buying parts.
Most mechanical parts in our products will be 3d printed on your own printer, so we will focus here on RC electronics.
On-line beginners guides:
If you have any questions regarding our models, feel free to ask us (or other 3dsets
builders) on our Facebook discussion group, available here: Facebook – 3dsets
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Rancher 4x4 – version 1.1: What do you need?
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Rancher 4x4 – version 1.1: Required hardware
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Screws and nuts (in metric size):
Check 3d printer calibration!
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Please at first test whether the bearing can be inserted into the calibration part. If you have problems or the bearing fits too loose, please make sure that the printer is properly calibrated. Dimensions of the printed parts should match dimensions of the 3d model.
Subassembly #0 – Arms
In this 1-step procedure you will assemble axle arms, steering rods and trackbar. These parts consists of “arm” and “ball joints” and they need to be pressed together.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Arms + Ball joints
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1x M3x6
Apply grease on Ball joint.
Press Ball joints in arm ends. Pay attention to combine parts correctly! Ball joints requires correct orientation on specific arms – check next page!
Option A: use a hammer
Be careful as you can break the arm if you use too much force!
Option B: use a Vise
This is a prefered method as you can proceed slowly.
Arms + ball joints
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On the pictures below are rendered final Arms assemblies. Please note that some Arms requires opposite Ball joint orientation!
Blue marked Ball joint – upside down!
Shorter Arm (127.6 mm) = “Control Arm – upper”
Longer Arm (132 mm) = “Control Arm – lower”
Rancher 4x4 – chassis
In this 5-step procedure you will assemble chassis of the car and front panel.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
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Rancher 4x4 Chassis - step 1-2/5
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1x M3x10
5x M3x12
5x M3x12
1x M3x10
2x M3x6
8x M3x10
Rancher 4x4 Chassis - step 3/5
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4x M3x10
1x M3x12
6x M3x10
4x M3x12
1x M3x12
4x M3 locknut
2x Ø2mm
“Front frame - right” have 2 holes for Track Bar - front!
Correct servo mount position.
Track Bar mount – there are 3 different sizes, choose one depending on your shocks size (for longer shock use bigger Track Bar mount). Proper orientation: shorter end is facing forward!
Rancher 4x4 Chassis - step 4-5/5
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4x M2x6
4x M3x10
4x M2x10
2x M3x16
2x M3x6
Subassembly #1 – Gearbox
In this 7-step procedure you will assemble gearbox with motor. To complete this task, get ready all necessary parts:
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Gearbox – step 1/7
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Put gears onto corresponding shafts. Pay attention to combine parts correctly!
Correct configuration
of gears is shown above.
Recommended material for gears: Fillamentum PLA Extrafill, as it is very rigid (PET may be too fragile!). Or use another top-quality PLA – you can test it by flexing the end of the filament on your spools and you will see which one is fragile. Use higher printing temperatures, about 210-215°C for PLA to have firm layer adhesion!
Gearbox – step 2-3/7
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Put bearings on shaft ends. If you printed and checked the “Test part” with bearing successfully, bearings should fit smoothly.
Insert shafts into the right side of the geargox housing. Then apply grease on gear tooths.
10x
Gearbox – step 4/7
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7x M3 locknut
7x M3x25
Gearbox – step 5/7
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Motor pinion – version A:
use this pinion if you are using “round head screws”
M3 nut
Recommended material for motor pinion: ABS or CPE, as the PLA is can melt due to the heat from the motor shaft and PET is too flexible (pinion will slip from the shaft).
M3 nut
Insert nuts into holes in motor pinion.
Motor pinion – version B:
use this pinion if you are using “socket head screws”
Gearbox – step 6/7
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Now mount the motor and bearings to their positions. Then install motor pinion on motor shaft.
Insert nuts into holes in motor pinion.
2x
4x M3x10
2x M3x6
8xØ3,2mm
M3 nut
Recommended material for motor pinion: ABS or CPE, as the PLA is can melt due to the heat from the motor shaft and PET is too flexible (pinion will slip from the shaft).
Gearbox – step 7/7
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Now you have complete and working gearbox.
Mount gearbox cover with motor to assembled gearbox housing. Pay attention to bearing and shaft, which sits in gearbox cover.
8x M3x10
Recommended material for “Gearbox housing - front”: ABS, ASA, CPE or PET-G, as the PLA is can melt due to the heat from the motor, if you drive continuously or in warm weather. It is strongly recommended to install optional motor heatsink, preferably active! Purchase links are here or use any similar heatsinks.
active heatsink
passive heatsink
Test the gearbox before mounting to the chassis!
You should be able to turn gearbox output shaft by hand with some force (attach Cardan Joint Yoke to the output shaft). After that, you can connect 3 - 7 V battery directly to the motor, it should run.
Rancher 4x4 – gearbox installation
In this simple 1-step procedure you will install Gearbox in the center of the chassis.
Required non-printed parts:
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Rancher 4x4 - step 1/1
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2x M3x12
Axles – postprocessing
Before you start building Axles, carefully remove printing supports (marked red) integrated to specific parts rendered below. You can use pliers and sharp knife to make the procedure easier. Be very careful as you can harm yourself!
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supports marked in red has to be removed
Subassembly #2 – Rear axle
In this 6-step procedure you will assemble rear axle. Axle include locked differential and driveshaft.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Rear axle – step 1-2/6
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M3x10
4x M2x8
4x
4x M2x6
1x M3x10
Ø3,2mm
Recommended material for differential gears & cardan joints: PLA, as it is rigid enough for this purpose.
Rear axle – step 3-6/6
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4x M2x6
8x M2x6
4x M2x6
Apply grease on gear tooths.
Subassembly #3 – Front axle
In this 10-step procedure you will assemble front axle. Axle includes locked differential, driveshaft and complete steering assembly.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Front axle – step 1-4/10
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M3x10
1x M3x10
4x M2x6
Apply grease on gear tooths.
4x M2x6
Ø3,2mm
Front axle – step 5-6/10
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8x M2x6
4x M2x6
4x M2x6
1x M3x10
1x M3x10
Ø3,2mm
Front axle – step 7-8/10
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4x M3x10
M3 locknut
M3 locknut
2x M3x16
1x M3x25
M3 nut
Front axle – step 9-10/10
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4x M2x6
Rancher 4x4 – bodywork & axles
In this 10-step procedure you will assemble bodywork of the car and then you’ll install axles, that you have finished from previous steps.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
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Bodywork – postprocessing
Before you start building Bodywork, carefully remove printing supports (marked red) integrated to specific parts rendered below. You can use pliers and sharp knife to make the procedure easier. Be very careful as you can harm yourself!
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supports marked in red has to be removed
Rancher 4x4 - step 1-2/10
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8x M2x6
8x Ø2mm
4x M3x10
2x M2x6
Rancher 4x4 - step 3-4/10
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4x M3x10
4x M2x10
2x M3x10
7x M2x6
1x M3x6
Rancher 4x4 - step 5-6/10
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4x M2x8
1x M2x6
2x M2x12
1x M2x16
6x M2x10
Rancher 4x4 - step 7/10
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4x M2x6
2x M3x10
4x M2x6
Ø3,2mm
Rancher 4x4 - step 8/10
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8x M3x16
8x M3 locknut
4x M3x10
132 mm = “Control Arm – lower”
127.6 mm = “Control Arm – upper”
Rancher 4x4 - step 9/10
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6x M2x6
8x M2x6
Rancher 4x4 - step 10/10
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17xM3x16
1x M3 locknut
1x M3x20
Rancher 4x4 - Electronics and Seats
In this 4-step procedure you will install all electronics equipment and cables. Then you will mount seats on their positions.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Electronics and Seats – postprocessing
Before you start building Electronics and Seats, carefully remove printing supports (marked red) integrated to specific part rendered below. You can use pliers and sharp knife to make the procedure easier. Be very careful as you can harm yourself!
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supports marked in red has to be removed
Rancher 4x4 - step 1-2/4
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4x M3x10
Twin cable length 280mm
Twin cable length min. 250mm
Rancher 4x4 - step 3-4/4
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4x M3x10
screw M3x10 into Floor Mat
1x M2x10
loose M3x16, insert Rear Seats, then tighten again
2x M2x6
Subassembly #4 – Bumpers
In this 2-step procedure you will assemble front and rear bumpers. To complete this task, get ready all necessary parts:
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Front Bumper – step 1-4/4
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2x M3x16
1x M3x25
2x M3x16
Rear Bumper – step 1-2/2
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2x M3x16
Subassembly #5 – Windshield
In this 3-step procedure you will assemble windshield. To complete this task, get ready all necessary parts:
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Windshield – postprocessing
Before you start building Windshield subassembly, carefully remove printing supports (marked red) integrated to specific part rendered below. You can use pliers and sharp knife to make the procedure easier. Be very careful as you can harm yourself!
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supports marked in red has to be removed
Windshield - step 1/3
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At first, you will make a “windscreen glass” from any transparent foil up to 0.5 mm thick. Thicker material is more durable than thinner, but we found that “Clear Binding Covers” are OK.
Place the Windscreen Frame on the foil, sketch the Windscreen Frame to foil and then cut the Windscreen glass by scissors or sharp knife.
Sheet of transparent foil, max. 0.5 mm thick.
Windshield - step 2-3/3
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4x M2x6
6x M2x12
Rancher 4x4 - windshield, bumpers and dashboard installation
In this 4-step procedure you will mount windscreen in place. Then you assemble the dashboard and attach it. Front and rear bumpers are installed too.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
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Rancher 4x4 - step 1-2/4
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4x M3x10
4x M3x12
2x M2x10
Rancher 4x4 - step 3-4/4
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2x M3x16
2x M2x8
1x M3x25
Subassembly #6 – Roll Cage
In this 2-step procedure you will assemble roll cage. To complete this task, get ready all necessary parts:
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Roll Cage – postprocessing
Before you start building Roll Cage, carefully remove printing supports (marked red) integrated to specific parts rendered below. You can use pliers and sharp knife to make the procedure easier. Be very careful as you can harm yourself!
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supports marked in red has to be removed
Roll Cage - step 1-2/4
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2x M2x10
10x M2x10
Roll Cage - step 3-4/4
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2x M2x10
2x M2x8
Subassembly #7 – Wheel (A or B)
Now you will assemble wheels. You can choose between 2 designs (wheel A/wheel B):
Wheel A:
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
Wheel B:
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Wheel A
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10x M2x6
10x M2x16
Wheel B
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5x M2x10
5x M2x10
Rancher 4x4 - Rollcage & Wheels installation
In this 2-step procedure you will install the Rollcage and then mount 4 wheels on axles plus one wheel as a spare on trunk holder.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
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Rancher 4x4 - step 1-2/2
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4x M2x10
2x M2x6
1x M3x16
4x M3x10
Subassembly #8 – Doors
In this X-step procedure you will assemble doors. To complete this task, get ready all necessary parts:
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
Non-printed parts:
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Doors – postprocessing
Before you start building Doors subassembly, carefully remove printing supports (marked red) integrated to specific parts rendered below. You can use pliers and sharp knife to make the procedure easier. Be very careful as you can harm yourself!
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supports marked in red has to be removed
Doors – step 1-2/2
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3x M2x6
1x M2x6
2x M2x10
1x M2x12
2x M2x8
Pictures shows just left-side doors – repeat these steps for right side too.
Rancher 4x4 - Hood & Doors installation
In this 2-step procedure you will install the Hood and then mount both Doors in their place. This is the last step, so then you are ready to ride the model.
Required print plates (for Prusa i3):
Required print plates (for generic 20x20 printer):
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Rancher 4x4 - step 1-2/2
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8x M2x10
4x M2x6
2x M3x6
2x M3x6
2x
Rancher 4x4 - model complete
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Now you are ready to drive :-)
Rancher 4x4 - general tips
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