COMGROW CNC Carving Machine User manual

User Manual V1.1

Catalog Disclaimers
01 Disclaimers
02 Welcome
03 Characteristics
04 Contents
05 Assembly
06 Wiring schematic
07 Mainboard Module
08 Install Driver & Software
14 Q&A
Before operating the ROBO CNC, please read the instruction manual carefully. This is to
avoid undesirable results that may damage the CNC machine or cause personal injury.
Anyone operating a CNC machine should know and understand the content of this
manual.
1. COMGROW cannot verify and ensure that you are assembling the ROBO CNC correctly. We are not
responsible for and expressly disclaim liability for loss, injury, damage or expense associated with the
assembly, handling, storage, use or other disposal of the product.
2. The information in this manual is provided without warranty of any kind, either expressed or implied.
3. Please be careful when using the CNC machine. This machine is an electrical device with moving parts and
dangerous areas.
4. The ROBO CNC machine is for indoor use only.
5. You must be 18 or older to operate this machine, unless under the supervision of an adult skilled in the
use of this machine.
6. Please wear appropriate personal protective equipment (safety glasses, etc.).
7. Please place the CNC machine on a stable surface.
8. ROBO CNC machine provides switchable power supply 230 VAC or 110 VAC. It is forbidden to use different
power supply, it may lead to machine malfunction or even damage.
9. Please make sure that the emergency stop button is functional at all times.
10. Do not disassemble the power supply or electrical components. This will void the warranty.
11. Do not touch the machine spindle or place any body part near the work area while the machine is
running.
12. Please do not allow children near the machine, as damage may occur even if the CNC machine is not
working.
13. Please do not run the machine unattended.
14. Please make sure your CNC machine is in a well ventilated area. Some materials may emit fumes during
operation.
01
01
02
03
04
05
09
12
14
Off-line controller
10 24
11
Tool setting gauge block
23
09 Operation precautions 22
12 Laser engraving 28
32
13 Routine maintenance 31
Routine maintenance

02 03
Comgrow was founded in 2017 by people who have a serious passion for technology that helps
you make things. With this deep-rooted dedication, we wanted to make the digital manufacturing
process more accessible, giving educators, engineers, manufacturers, small businesses and tinkerers
the power to make anything.
Headquartered in Southern China,Shenzhen, Comgrows’ dedicated staff is committed to
providing the kind of service that makes you say"wow." We offer the highest quality materials,
machines, and accessories - from industrial-grade 3D printers to DIY laser cutters - all of which have
been tested and approved by our in-house experts. Our amazing gals and guys in customer service
are here Monday through Saturday to help with anything you may need, from finding the right
material to package your specific product, to discussing which printer is best for new users. Bottom
line is, we're here to make 3D printing, laser cutting, and CNC (will release in May. 2021) milling magic
happen. Contact us.
Thanks again for using our CNC engraving products, if you encounter any problems during the use, we
will reply you at the first time.
Service Email: [e-mail]
For related installation files, please check: https://www.comgrow.com
Join our Facebook support group: https://www.facebook.com/groups/comgrow/
WELCOME TO COMGROW!
Product exterior size 400*275*268mm(motor not included)
Characteristics
Milling size 300*180*45mm
Weight 7.5KG
Drive motor 42 stepper motor，0.48 N.m.
Spindle 775 motor, 12V~24V,10000RPM
System Windows XP, Windows 7 32/64 bits,
Windows 8, Windows 10, Linux system.
Composed of aluminum, the overall structure is stable to meet the
needs of milling a wider range of materials; available for engraving
and cutting wood, plastic, acrylic, PCB, soft aluminum and so on;
unavailable for hard metals, jade and other hard objects
Acrylic baffle prevents from dust and make it easier to clean up;
equipped with emergency stop button, stop milling with one press
Operating by GRBL software or offline control handle；

Ready:
04 05
Contents Assembly：Part 1
Y-axis base
Spindle motor
Wrenches
Milling tool kit
M5X10 Screw *8 T-nuts *8 Butterfly nuts *4 M5X40 Screw *8 M4X25 Screw &
Square Nut*1
Brushe M5X12 Screw *10 Hexagonal wrench Wire Buckle
Clamps*4 SD Card USB cable Tool setting gauge
block
Spindle Tool holders offline control handle
XZ-axis gantry Protective baffle Plug 24V/5A Adapter
offline control
handle cable
+
Remove the two protective baffles (a)
and install the M5*10 (c) screws and M5 T-nuts (d)
Install the protective baffle on both sides of the
Y-axis base (b)
(d)
(a)
(c)
a：Protective baffle（x2）
b：Y-axis base（x1）
c：M5X10 Screw（x8）
d：M5 T-nuts（x8）

Ready:
06 07
Assembly：Part 3
Ready:
Assembly：Part 2
e：back side panel（x1） g：M5X12 Screw（x6）
h：XZ-axis gantry（x1）
f：M5X12 Screw（x2）
(h)
(g)
(e)
Use two M5*12 screws (f) to secure the back side panel (e)
to the rear of the Y-axis base
Using six M5*12 screws (g) ,
secure the XZ-axis gantry (h)
to the side of the Y-axis base.
(f)

08 09
Wiring schematic
Ready:
Assembly：Part 4
i：M4X25 Screw（x1）
k：Square nut（x1）
Take out the spindle motor and load into the collet,
Use an Hexagonal wrench to jam the gap
Z-axis limit switch cable Y-axis limit switch cable
Y-axis limit switch cable
The spindle red wire
is connected to the
port next to the red
dot mark on the motor
The side with the red
dot is the "+" pole
Use M4*25 screws (j) and square nuts (k) to secure the collet .
Note:Don’t lock the screw too tightly to avoid damage to the collet.
After holding the collet open, slide down the spindle motor.
Note: Do not block the spindle fan outlet with the Z-axis chuck.
Make sure that at least 2/3 of the length of the
Z-axis chuck is clamped to the motor.
j：M4X25 Screw（x1）
+-
The power supply and the direction of the plug have requirements, do not allow thereverse connection,
otherwise there will be the risk of burning the motherboard.
The correct way to connect: snap and convex bit with the same direction. Attach the Wire Buckle to the
backplane to secure the wires

Tool Change
Use two wrenches to remove the lock nut on the spindle, select the appropriate tool into the handle, need
to pay attention to the handle orientation, and then install together on the spindle, finally use two
Wrenches to lock the nut on the spindle.
10 11
Assemble the hold downs
•Fixing the material (PVC, wood, acrylic, or other plastic boards.) on the table of the engraving machine
with clamps.
•Note: Make the screws supporting the profile plane and the thickness of the engraving material the same
height, please avoid tightening the screws too hard to avoid deforming the table T-slot.
•Consider the size of the carving size when clamping the material, because the chuck of the spindle motor
will occupy the space, which will avoid the spindle tool to touch the platen when carving.

Instructions for use of the main board mode：
Mainboard Module
24V
power input
Fans
Z limit switch
Y limit switch
Z limit switch
Emergency
stop button
Adjusting-tool
Spindle MOS tube
mode power input
Spindle MOS tube
mode motor interface
Spindle relay mode
power input Spindle relay mode
motor interface
•AB top at the same time, for MOS tube mode, can adjust the spindle speed,
the motherboard default wiring in this mode.
•A up B down, for the relay mode, can not adjust the spindle speed, you need to use an external
current greater than on the motherboard.
•A down B up, f12A power supply, while changing the plug connectionor black and white carving mode.
•A down B down for grayscale engraving mode.
Preview port
USB Port Offline control
handle port
Laser spindle switch
Functional Module
Z motor
Y motor
X motor
PWM
signal interface
PWM
power supply
Two-wire system
laser interface
12 13

Install Driver & Software 2. To Determine your Machine's COM port:
•Windows XP: Right click on "My Computer", select "Manage", select "Device Manager".
•Windows 7: Click "Start" Right click "Computer" Select "Manage" Select "Device Manager"
from left panel.
•In the tree, expand "Ports (COM & LPT)"
•Your machine will be the USB Serial Port (COMX), where the “X” represents the COM number,
for example COM12.
•If there are multiple USB serial ports, right click each one and check the manufacturer,
the machine will be "CH340".
1. Install the driver
1.If you are using it for the first time,
you need to perform steps 1-9 to Install
the driver.Firstly ,Insert the complimentary
SD card into your computer via USB.
2.Open the SD card, select
"CNC Carving Machine".
3.Select "software".
4.Select "win".If you're on ios,
choose "mac".
5.Select "Driver".
6.Double click "CH340SER".
7.Click "INSTALL",start installing drivers.
8.Click "OK" , finish Install the driver.
14 15

3. Open Grblcontrol software 4.Grblcontrol Use
•Click Service
•Choose COMX port
• Click OK，connect
• Check connection display，if 'Not Connected' is displayed，
connection fails if 'Port Opened' is displayed, connection is done
2.Select "Grblcontrol (Candle_1.1.7)"
1.You can obtain this software from others,
or you can use our complimentary software .
Open the SD card and find "software",
then select "win".
Connection Display
3.Find the"Grblcontrol (Candle) .exe"
and open it .
16 17