Dremel 3D40 Operating instructions

Read the Dremel 3D40 manual and these

instructions before replacing the level-

ng servo motor in your Dremel 3D40. Failure to comply

with the warnings and instructions may result in fire,

equipment damage, property damage, or personal injury.

Always unplug Dremel 3D40 from its power before per-

forming any service procedures. Failure to do so may re-

sult in personal injury and equipment damage.

Use only Dremel approved materials and components.

Use of object materials, or 3D objects other than Dremel ap-

proved object materials and genuine Dremel components

may void warranty.

Repairs on the Dremel 3D40 may require the use of special

tools (pulling devices and bearing press). Authorized repair

centers have trained repair technicians and equipment nec-

essary to perform these repairs.

For the location of the repair center near you, please call 1-

844-4DRML3D (1-844-437-6533) Monday thru Friday, 8AM

o 6PM CST. Or, look on our web site at www.Dremel3D.com

and follow the link for ‘Support’.

Dremel 3D40 – Replacing the

leveling servo motor assembly

WARNING

SERVICE

CONTINENTAL UNITED STATES CANADA

Dremel Service Center

4915 21st Street

Racine, WI 53406

Phone: 1-844-4DRML3D

Giles Tool Agency

47 Granger Ave,

Scarborough, ON

M1K 3K9, Canada

Phone:1-416-287-3000

West Coast Tool

4008 Myrtle Street

Burnaby, B.C. V5C 4G2

Phone: 1-604-873-5394

Use proper anti-static precautions when

performing this replacement. Discharge

static electricity before beginning. Work on a static-free sur-

face.

This document will outline the steps necessary to replace a

defective or damaged leveling assembly. This includes the

leveling switch, servo motor, and mounting bracket.

Figure 1: Replacement levelling servo motor assembly

Tools Required:

• 2mm Hex wrench (Allen key)

• T10 Torx (star) screwdriver bit

• Scissors

Step 1: Bring Printer to Safe State for Service

1. Turn on the printer, and verify that the temperature icon

reads cool (blue). If it is not blue, allow adequate time for

the nozzle to cool until the icon reads blue.

Figure 2: Home Screen (see encircled nozzle temperature)

2. Turn off the printer.

3. Unplug the printer.

CAUTION

Step 2: Remove Top Cover of Extruder

. Cut the filament just before the intake on the top of the

extruder.

Figure 3

2. Unscrew the two screws on the top of the filament guide

bracket.

Figure 4: Extruder cover removal

3. Remove the top cover.

4. Carefully unplug filament runout switch from the extruder

circuit board, ensuring to pull from the plastic plug and not

the wires; pulling the wires can damage the connection to

the extruder.

Figure 5: Runout switch connector being disconnected

from extruder PCBA

Step 3: Removing the Shielded Circuit Cable

. Using the 2 black push pins (top encircled yellow, bottom

hidden) of the shielded circuit ribbon cable, push down to

release it from the circuit board.

Figure 6: Disconnect shielded circuit ribbon cable

from extruder PCBA

2. Remove the connector from the circuit board and pull up

on the cable. Always use great care when handling a

shielded circuit cable.

Figure 7: Removal of ribbon cable from extruder housing

3. Set aside the cable within the machine, making sure there

are no sharp kinks or turns produced.

Step 4: Remove the Leveling Servo Assembly

. Remove the three screws holding the servo motor bracket

in place with a T10 Torx (star) bit.

Figure 8: Unscrew servo motor levelling switch chassis

2. Get a visual understanding of how the levelling arm is

located and oriented in the assembly (see picture below)

and then pull the servo motor assembly vertically upwards

away from the extruder.

Figure 9: Take note of how levelling switch is located

and oriented before chassis removal.

Step 5: Disconnect the Extruder Circuit Board

1. Disconnect the leveling switch (black and red wires) and

servo motor (red, brown, and yellow) from the extruder

circuit board. When removing these, always remove by the

plastic connectors. Never pull by the wires - this can

damage or break the connectors.

Figure 10: Disconnect encircled connectors

Step 6: Reassemble the Extruder

. Replace the leveling servo assembly carefully by maneu-

vering the levelling arm through the extruder chassis.

2. Replace the three screws holding the servo motor chassis

n place as shown in Figure 8.

. Reconnect both wire connectors to the extruder circuit

board as shown in Figure 10.

4. Loop the shielded circuit cable through the plastic guide

racket. Refer Figure 7.

5. Press the black connector pins on the shielded ribbon

cables and align with the receptacle as shown in Figure 6.

Gently push the ribbon cable onto the receptacle and

release the black pins. An audible “click” should be heard

when it is reconnected.

6. Reconnect the filament runout switch from the extruder top

cover to the circuit board. Refer Figure 5.

7. Replace the top cover and the two screws attaching it to

the extruder. Refer Figure 4. PLEASE NOTE: After replac-

ing the top cover ensure that no wires are exposed out of

the extruder body. If any wires are exposed or hanging out,

the extruder top cover will need to be removed and re-

placed.

Step 7: Calibration

This step will outline how to calibrate the leveling arm and

the z-offset for the extruder. The new leveling arm does not

know where it is in rotation before calibration, so the following

instructions will calibrate it to the correct position.

1. With the printer turned off, insert the supplied USB stick

into the USB port on the front of your 3D40.

2. Turn on the printer and wait for the calibration screen to

appear.

3. The “level arm set: (1/2)” will show up on the screen. The

Up and Down orientations have + and - adjustment

buttons. The adjusted angle can be seen in the black box

between the + and – buttons.

a. Press “test” once to move the levelling arm down.

Figure 11: Levelling Arm visible after pressing “test”

b. Visually judge if the leveling arm is vertical. If not, press

+ to increase angle or – to decrease angle in front of

“down” as shown in Figure 12 below.

Figure 12

c. Press “test” twice to check the orientation after adjust-

ment in vertical position. If not satisfied with the orien-

tation of the arm, repeat step b and c until desired

orientation is achieved in vertical position.

d. Press “test” once to move the arm in the stow position.

e. Visually judge if the leveling arm is exposed like it is

shown in Figure 13 below.

Figure 13

f. If yes, press - to decrease angle in front of “up” as

shown in Figure 14 below.

Figure 14

g. If the arm makes a hitting sound or rebounds back

while stowing, then it is stowing too high. In that case,

press + to increase angle of stowing in front of “up”.

The arm should be stowed as shown in the Figure 15

below, such that it doesn’t expose or rebound.

Figure 15

h. Once the angles are adjusted for both vertical and

stowing positions, press “next”.

4. Next screen, “z gap set: (2/2)” will guide in adjusting the

vertical gap (z gap) between the nozzle tip and the build

plate. The gap will be shown in the black box. Initially the

gap will always show 0 regardless of the true gap between

the nozzle and the build plate.

Figure 16: z gap set screen

a. Press the black box “0”. This will cause the machine to

check the present gap between the nozzle tip and build

plate.

b. Use the gage paper (0.15mm thick) provided and

check if it can slide in between nozzle tip and build

plate without putting any vertical force on it.

c. If the gage paper can’t enter the gap, press “increase

gap” once (to increase by 0.1mm) and then press the

black button to increase the gap.

d. Repeat step c until gage paper can slide in between

nozzle tip and build plate.

e. If the gage paper can enter easily and there is a big

gap, ignore steps c and d. Use the “decrease gap”

once (to reduce by 0.1mm) and then press black button

to decrease the gap.

f. Repeat step e until gage paper can slide in between

nozzle tip and build plate, but should be snug.

g. Once the gap is adjusted using the gage paper pro-

vided, press “finish” to end this adjustment program.

The machine will get out of the calibration procedure

and the LCD will display “Build On” and then the home

screen. The calibration procedure is complete.

h. Remove the USB stick.

Congratulations!

You are now ready to build. Build On.

2610038113 11/16

Step 8: Test the Machine

. Level the printer before moving forward – Navigate to the

leveling screen by pressing level on the home screen, and

following the instructions on screen.

. Navigate to “Filament” and follow the on screen instruc-

tions to load filament.

3. Build the “Test Print” file on the machine to ensure the

D40 printer is working correctly.

. If prints are not adhering to the build plate, the z-axis offset

may need to be adjusted. If so, continue to step 9.

Step 9: Adjusting the Z-axis Offset

. Navigate to the z-axis offset screen, following: Tools→Set-

tings→Z-Axis Offset.

2. Follow the on-screen instructions to either increase or

ecrease the offset.

. Always adjust the z axis offset once (0.1mm increments/

decrements) and test by repeating Step 8 above, before

aking any further z axis offset adjustments.

Figure 17: Z-Axis Offset screen

Dremel 3D40 Operating instructions

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