CHINA CNC router: Annoying problems
Bad experience with imported cheap – milling machine from China
Engineer Hans-Jürgen F. from Bad Herrenalb is rightly angry about the useless cheap CNC router from China
Good afternoon CNC-STEP team,
I have a China CNC router 3040TZ – and was reasonably satisfied.
I have licenses for Corel, MACH3, PhotoVcarve …
My problem: Machine “wears out” – the latest effect axial play x-axis.
A repair seems questionable, too expensive, hopeless and then the other “small” defects.
Can’t find prices of your machines, could be interesting.
Need the milling machines almost exclusively for the production of stamps.
I think the “smallest” router would do. Operation should be -as before- via control at the par-Port.
Do you have something to offer?
Own experiences and tips for the cheap China CNC routers
China’s technical products at a high LEVEL – BUT …
China has gained a lot of ground in the last ten years in the field of tech products. In the area of drones, mobile phones or electric vehicles, the Chinese have now conquered the global market and secure more patents every year than any other country in the world. So the times of total COPPING are over. However, the sophistication of these people, always accompanied by good humour, should not be underestimated.
No matter where in the world – hands-off from too cheap products
The problem is posed by Chinese manufacturers who take advantage of the prevailing good faith in the West. Even here in Germany, you cannot expect a CNC machine made in Germany for perhaps 1300 Euros to meet all the requirements of the user and that all the manufacturer’s specifications were not safe from embellishment! Let us come to the core:
Problems with cheap China milling machines not unusual
CNC routers from China are called 3040T, 6040, HY 3040 or 3040z + 52. Everywhere on platforms such as ChinaCNCzone, E-Bay and Co. praised – Often however completely unusable. But as a user, of course, this knowledge is only achieved after a few minutes or hours of commissioning.
It is impossible to recognize existing production defects before buying.
At least as a loan or novice, who want to get a taste of CNC technology or to get a CNC kit for the entry. But even as a professional the actual production deficiencies and the often sluggish to inadequate processing are only recognizable after the first apparent inspection. This is why CNC users have always experienced extreme problems with portal milling machines from the Far East. Despite several statements and warnings in blogs and forum entries on the Internet. One can not warn enough of these low-cost products. The clocks simply tick differently in China.
Good or decent quality – not existent
You don’t have to be clairvoyant to judge why this cheap mass production cannot be of high quality. With a daily wage of 70 cents to a dollar for all unskilled workers, one can hardly expect a qualified final assembly. In addition, the cheapest parts are used. Here the ball bushing for the size 12 linear guide costs just 20 dollar cents.
Linear guides too small
Some of the biggest problems are the lack of dimensional accuracy of the mechanical components (but the decisive factor for proper milling results). As a result, you can read in blogs again and again that they have linear guides, some 0.1mm undersize to the sockets. This is not even easy to solve with technical knowledge.
Thread cut poorly or obliquely
Also interesting are some threaded holes. These are often done with blunt tools, so you can not really screw out the screw once it has been screwed in. In addition, almost all threads are cut obliquely, and the shavings of the thread cutting are still present in the drill holes. Some screws hold only just as the bores are drilled too much and the thread has no depth on the flanks. Results of the workings of totally unskilled workers.
Child labour in the assembly of China milling machines
Partially, these milling machines are assembled by children! This is done in countless professions and industries in the Far East and is not unusual. So please do not support this crime! It is enough already, that today one or the other piece of clothing is purchased, without knowing that it has possibly been made by a child.
Experiences with CHINA CNC cheap milling machines are usually negative
We ourselves have already taken the path several times and have imported HF spindles or whole CNC machines from China directly to check the quality and to find out whether China really represents a serious country of CNC milling machines. And I am relaxed today, we can sit back for a long time confidently.
All those who want to work in high quality and without stress – hands off from the purchase of cheap ready-to-use CNC machines! No matter if from Germany, Romania or China!