DIY CNC 3 Axis Engraver Machine PCB Milling Wood Carving Router Kit Arduino Grbl
The mini CNC engraving machine laser engraving machine is suit for make non- metal processing such as plastic , wood , acrylic , pvc, pcb, wood or the similar material , etc.And airframe adopt profiles + plastic ，small size, light weight , USB interface , open source GRBL control.
The repeat positioning accuracy is with in 0.1mm under no-load, usually is about 0.05mm. Laser is considered no-load. If you use graver, the precision is depending on the hardness of the material
Grbl is a no-compromise, high performance, low cost alternative to parallel-port-based motion control for CNC milling. It will run on a vanilla Arduino (Duemillanove/Uno) as long as it sports an Atmega 328.
The controller is written in highly optimized C utilizing every clever feature of the AVR-chips to achieve precise timing and asynchronous operation. It is able to maintain up to 30kHz of stable, jitter free control pulses.
It accepts standards-compliant g-code and has been tested with the output of several CAM tools with no problems. Arcs, circles and helical motion are fully supported, as well as, all other primary g-code commands. Macro functions, variables, and most canned cycles are not supported, but we think GUIs can do a much better job at translating them into straight g-code anyhow.
Grbl includes full acceleration management with look ahead. That means the controller will look up to 18 motions into the future and plan its velocities ahead to deliver smooth acceleration and jerk-free cornering.
Note：The engraver machine couldn't carve 3 dimensional objects. The different hardness of the material, the different thickness of the carving, and the maximum carving thickness is 30mm. The kit includes xyz stepping motors. You don't need purchase any parts separately, it is enough for working.
- motor model no.：L42BYGH34-1334A
- current/phase：1.33 A
- resistor/phase： 2.1 Ω
- inductance/phase：2.5 mH
- static moment：2.2 kg-cm
- motor outlet：4#
- rotary inertia：35 g-c㎡
- motor weight： 0.22kg
- Positioning torque：120kg-cm
- Body length：34mm
- Model no.: 775
- Condition: New
- Shaft Diameter: 5MM
- Shaft length: 17
- Body length: 66.7
- Front step diameter: 17.4
- Front step height: 4.7
- Body diameter: 42
- Motor Total length: 98
- Diagonal assembly hole distance: 28.8
- Long assembly hole distance: None
- Assembly hole size: M4
- Assembly fix hole: 2
- Radiator fan: Yes
Model profile size
And the head travel dimensions of the mini CNC engraving machine laser engraving machine as follow:
X: 13cm Y: 10cm Z:7.5cm
Engraver Machine base and Assembly instructions
b)Assemble： Please note to reserve the nut previously, and kindly refer to below instruction view:
c)The aluminum profile are connected as below:
d)Final effect: If feel the assembling is smooth, please tighten the screw as possible, so as to keep it fix and stable.
Try to assemble on flat place, working table is preferred.
2. Y Axis assemble
b)Direct optic axis pedestal assemble instruction: axis separation distance 120mm, which also could be adjusted as user’s mind. No need to tighten the screw too much, as it has to be adjusted slightly later.
e)Table assemble instruction view: No need to tighten the screw too much. The nut seat direction could be random. For slide block direction, please refer to below view.
f)Final effect: The axis distance could be adjusted according to actual situation.
3.Y axis motor and lead screw assembly
b)Motor assembly instruction: Please fix the coupling with the motor, as the motor shaft entering coupling for 12.5mm, then fix by the fastening screw. Fix the motor on motor assemble board, and fix the motor assemble board to the machine. Please note that no need to tighten the screw too much, for convenient adjust later.
c)Screw assemble instruction：
d)Assemble screw and coupling
The screw and coupling connecting should be concentric, as the fastening screw should be side by side, and be tightened alternatively. After fix it, manually turn the screw with even speed, and try to feel if the resistance is even.
e)Please refer to final effect as below:
Portal frame assemble: a)Part
b)Final effect: Reserve one nut on the back, for the purpose to assemble the control board, please refer to below view.
4.X axis assemble
b)Install XZ assembly. Please refer to below view. Align the edge of optic axis supporting pedestal with top side of aluminum profile, with axis distance 68mm. The assembly requirement is the X axis could move evenly left and right.
c)Please refer to final effect as below view.
b) Please refer to below view for assembly: The distance between portal frame and pedestal tail should be 6mm, the reason for which is the spindle axis and Y axis could coincide.
d)Install the assemble board of control board
How to use
- 1. Open the Device Manager to view the CNC port number: My computer assign is COM3.
- 2.Open the control software grbl Control, click the "Service -> Settings" to set: "COM3, 115200" and then click OK:
Console print out the message indicate that the "CNC" is connected successfully.
- 3.Test whether the X, Y, Z axis movement is normal or not by clicking the control panel on the right side.
Note: (1) Please don’t set the “step” too high, otherwise it will be over travel.
(2) Please run the program in the machine without engraving knife to get familiar with the operation procedures before installing it. Don’t install the engraving knife at first.
The engraving knife installation will be explained in following instruction.
- 4. Open one engraving file for test, and place an acrylic plate on the CNC platform for engraving, which should be fixed well.
- 5.Move X, Y axis to set the original coordinates point by control panel (Z-axis does not move at present) , click the control panel on the right side , set the X, Y axis as zero:
Click “Zero XY” to set the X, Y axis to be zero.
- 6.Start the Spindle of motor, adjust Z axis down, the Step value could be a little higher at the moment. When the engraving knife is going to touch the engraving object, must decrease “step” （Step≤ 0.1）, when engraving knife just touch the object surface, set Z axis to be 0.
Note: The Spindle must be started before the knife down, otherwise the engraving knife is easily to be broken.
Click Spindle button, the motor start to turn.
At the moment just touch the surface of acrylic, Stop the knife.
Click “Zero Z” to set the Z axis to be 0.
- 7.The work about knife is almost finished.
Next, click “send” button, start the engraving.
The engraving is finished.
The effect after color is added.
Standard Package List
Alternative Additional Item
- Laser Head for DIY CNC 3 Axis Engraver Machine[KIT_CNC_LASHA]
Posted by Unknown on 1st Aug 2016
First, the good. Mechanically, I think this machine is pretty solid. Building it was uncomplicated. with a few exceptions, the parts seem to be of decent quality, everything fit together. The Z axis assembly was pre-assembled, which helped greatly. All the 3d printed parts were high quality with bearings already inserted. When completed, it engraved a piece of acrylic as advertised. The completed machine seems like it will perform well.
The bad. While the directions for constructing the frame are fine, there are no directions for hooking up the wiring of the motors. I have experience building 3D printers, so I was able to figure it out. Others would have some problems getting the machine to function properly.
There is no information on setting up the machine to do actual milling. Are the stepper motors micro-stepping? What is the pitch of the lead screws? Without that information you can't set up a tool path on CAM software.
The plugs on the power supplies are shoddy. I had to replace them in order for them to work. The shafts on the stepper motors should have a flattened side to keep the lead screws from slipping. Little things like that are annoying.
I liked the construction of this machine. Worn parts can be easily replaced or upgraded. Extending the axes would not be difficult either. It would be a good entry level machine but for the lack of documentation on it's features. The target customers for this CNC would be happy, but not if they can't figure out how to use it.