Mini CNC Engraver




Introduction: Mini CNC Engraver

About: I conduct the blog, YouTube channel, I am engaged in reviews of various electronics, completions, alterations. I especially like power supplies.

I decided to collect myself a small machine for engraving.At first I wanted to do everything myself, but I thought that I would forgive buying it in the form of a designer, which will be easier to learn, especially since the price is not very high.

Step 1: What Was Included in the Kit

The packaging was divided into several separate boxes, where all the necessary parts for the assembly lay.The kit included chassis components, guides, motors, etc.

Step 2: What Was Included in the Kit 2

Aluminum chassis components and steel guide shafts, as well as fasteners.

Step 3: Assembling Part 1

The task is to first collect the engraver's chassis.We begin with the bottom part. To do this, take the four aluminum guides and collect them using corners.

Step 4: Assembling Part 2

The next step is to assemble the table that will move on the guides.

To do this, we use the components shown in the photo.

Step 5: Assembling Part 3

In the end, we should get such a strange design. :)

This will be a table moving along one of the axes.

Step 6: Assembling Part 4

The next step requires stepper motors, additional elements (included in the kit), as well as everything that we collected in the previous parts.

Step 7: Assembling Part 5

We install stepper motors on the chassis.

The engines are the same, because you can use any of the three.

Step 8: Assembling Part 6

Sometimes it can happen that the guide shafts will not reach and you will find that they are too short.

Do not worry, just slide one of the chassis bars so that the length of the shafts is enough for a normal installation.

After that, install the table with the drive shaft and fix it with the motor shaft.Be careful, the shaft should not have beats, careful tuning is necessary.

Step 9: Assembling Part 7

The lower part of the machine is almost ready.

We use three elements of the chassis and mount the upper part of the machine.I was a little mistaken when assembling, the correct position of the mounting elements is shown in the last photo.

It will be available in any version, but in the last version of the installation the working field of the machine will be approximately 20-25 mm larger :)

Step 10: Assembling Part 8

There are a few more steps left.Assembling the feed unit along the Z axis is the most complex node.

First we assemble the frame, here we also use plastic nuts and silicone washers. To properly set up such a knot, it is necessary to screw two nuts on the running shaft and tighten it so that the shaft is scrolled with a little effort.

Step 11: Assembling Part 9

Stepper motor installation and the last stages of assembly of the displacement unit along the Z axis.

Many steps are similar to the previous ones, therefore I do not think that there will be difficulties.

Step 12: Assembling Part 10

Of course you will ask, there were three stepper motors, but only two.

The third engine is mounted on the side and drives the assembly shown in the previous step.

Step 13: Assembling Part 11

Before the final milling of the mechanism, the spindle motor must be installed. It also comes complete.

We also mount a mechanism on the spindle shaft to fix the cutter.

Step 14: Assembling Part 12

We got the spindle assembly, install it on the chassis.

Do not forget about rubber feet, they will help your machine not to move spontaneously on the table.

This completes the mechanics of the machine tool.

Step 15: Assembling Part 13

Now you need to make all the connections.In the complete set there was a management card and all necessary wires.

Step 16: Assembling Part 14

The kit also gave an acrylic base, on which the electronics board will be installed. We install the backplate of our machine. In this case, the board can be installed both on the left and on the right, as it is convenient for you.

Step 17: Assembling Part 15

Using the wires that were in the kit, we put everything together. Be careful when extending the wires from the stepper motors, the photo shows the right connection.

Step 18: Assembling Part 16

Hooray, the machine is completely ready :)

Two power supply units are used to power the machine, 24 volts to power the spindle drive and 12 volts to power the stepper motors and the rest of the electronics, do not mistake!

Step 19: Testing

Now you can go to the testing phase.

Step 20: Testing Printed Circuit Board

First I tried to simulate the manufacture of a printed circuit board.

Step 21: Video 1

I recorded a video of the testing process. I think it will be interesting :)

Step 22: 3D Engraving

Also I tried myself in 3D engraving, for this purpose I will use a more complex program.

Step 23: Engraving Video

The speed of work turned out to be very small, the whole process took several hours, very long. Later, I finished the machine and show you how I did it and what the result was :)

Step 24: Small Explanations and References

The machine was purchased in the store Gearbest, cost about 170-190 dollars. A link to the machine, as well as an alternative.

They are also sold to aliexpress.I hope that my small article will help you understand how to make such a machine.

In my blog there is a full version of the article, but since it is in Russian, I'm afraid that you will not be comfortable.

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    4 years ago

    Please more info about software part.


    5 years ago

    Всем добрый день,купил такой же гравёр и очень рад хороший фрезер,есть проблема и не знаю как решить,вин7 игрбл9 при работе чпу пропадает связь с компьютером уже и на ноутбуке пробовал и шнуры менял и другую ардуино ставил,если у кого подобная проблемма решена скажите как?


    Reply 5 years ago

    Надо посмотреть сначала от чего питается Ардуина, там есть два варианта, от 12 Вольт и от USB. У меня было что начинала глючить если питать от 12 Вольт, в итоге просто отключил этот разъем.


    5 years ago

    Hi pretty nice guide:) 2 months ago i had to help one of my friend to assembly this kit. Did you put on any endstops? or this machine don't need them(like the 3d printers)?


    Reply 4 years ago

    It don't have any endstops, but defenetly needeng it. I already manage to damage motor coupler by streching it.


    5 years ago

    There's no "making" in this, but just assebling. But still a good engraver.


    5 years ago

    looking forward to the next post


    5 years ago

    Awesome! Does everything you need to finish the build come in the kit??


    Reply 5 years ago

    Yes, I do, I did not have to buy anything separately.

    The kit includes:

    Material for chassis assembly

    Four engines

    Control board

    Two power supplies

    Fixing screws and nuts

    Even gave three corner cutters and legs for the machine :)

    I can be wrong, but the software was also included.

    The only thing I did not like very much is the slow speed of work, screw propellers are applied with a very small step, this increases traction, improves accuracy, but reduces speed.

    In one of the following articles I will tell you what I bought to improve this machine.