Written by Dennis Heinze, excerpt from Hardwarepoint.
With the Jinsoku LC-40, SainSmart introduces a new CNC laser model. We compared it to our 3018-PRO DIY CNC milling machine, which was previously upgraded with a laser. Both models are priced around €400 and use a 5.5 W laser module. Besides the optics, there are some other differences.
Thanks to SainSmart for providing the test sample. This is the sales version available for purchase.
Unboxing
The LC-40 arrives well-packaged, with foam protecting each component. Most parts are pre-assembled, resulting in fewer individual pieces.
All frame parts are made of aluminum with a high-quality anthracite finish, and the corners are constructed from ABS plastic. The holders and mounts are milled parts with no sharp edges, making them feel more premium compared to the entry-level 3018-PRO DIY.
Package Includes:
In addition to the main frame parts and the 5.5-watt laser, the package includes:
- USB stick (manual, driver, software, test files)
- Power adapter
- Multilingual manual
- Toolset
- 2x Allen keys
- Paintbrush
- Whiteboard markers
- Cardboard box for initial laser tests
- USB cable
- 3x connection cables
- Cable holder
- Screw set
Assembly Note:
Both the cables and the connections are labeled for quick identification. The USB-C cable connects to the control module, while the black 3-pin plug goes directly into the laser. After plugging in the cable holders, the installation is complete.
Measure diagonally to ensure the structure is right-angled before securing it. The radii in the profile can make it challenging to create a perfect angle.
To finalize the assembly of the bridge, power up the laser. With the app firmware, the laser turns on at low power and begins a homing cycle. After this, the stepper motors hold all axes in position, making it easier to secure the bridge evenly.
Previously, I faced issues with alignment during assembly. With the laser on, the steppers maintain their working positions, allowing for precise adjustments. Once aligned and secured, the bridge remains parallel to the front and back.
You can now proceed to the Software/App chapter to start using the device. If you plan to control the LC-40 via the app, you are ready for initial tests. However, for advanced users relying on GRBL with software like Lightburn, it's advisable to invest time in calibration and tuning (details follow).
Features
Adjustments to the limit switches can enhance the working area. I achieved a working area of 395 x 400 mm. Accuracy and performance may vary with different laser modules; our model features a 5.5 W fixed-focus laser. There are also two other options available: 5.5 W laser compression and 10 W.
Tightening the Belt
This section illustrates how to tension the belt. All three belts should be pre-tensioned upon unboxing. Ensure that the tension on both sides of the Y axis is equal. If tension decreases over time, it must be readjusted. Remove the covering from the ends opposite the stepper motors, then unscrew the base. After removing the top panel tabs, you can also take off the top panel. Two additional screws hold the side panel, releasing the tensioning mechanism. Two Allen screws clamp the deflection wheel, while a third screw at the front tightens the belt.
Tests
Now it's time to implement the first projects. To understand how different materials behave, create a test pattern with various laser speeds and outputs. This can be done directly via Lightburn -> Lasertools.
Similar tests can be generated for cutting to determine the number of passes and power required to cut through different materials.
In addition to working with various woods, I tested glass and ceramics. Since the laser is similar to that of the 3018 PRO DIY, it can process similar materials. However, the LC-40 module appears to deliver more power, as the 3018 PRO DIY laser requires more power for similar results.
Read more on Hardwarepoint.
![[Part 2] Advanced CNC Design with Vectric Aspire](http://www.sainsmartshop.com/cdn/shop/articles/Frame_36747_2_f374d9f8-a0e0-465e-80ed-1bb349fc0a3b.png?v=1737359282 "[Part 2] Advanced CNC Design with Vectric Aspire")
2 comments
Very Interesting, Good job and thanks for sharing such a good information..https://www.signvec.com/
I have just bought the Jinsoku LC -40 laser engraver and found it extremely easy to set up and use. I can’t wait for the 10watt upgrade to be released as an upgrade which will make it even more versatile.