own experiences and tips for the China CNC router
Problems with China milling machines not unsusual
China CNC milling machines – often afflicted with negative experiences
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 knowlege 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 just wants to sniff into the 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 this low-cost stream from CHINA. The clocks simply tick differently in China.
Good or decent quality – not existent
You do not necessarily have clairvoyant abilities to assess why this mass production can not 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 labor 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 unsusual. 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 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. For all who want to work qualitatively, our advice – HANDS OFF from the purchase of a fixed and finished China CNC machine!