4 Most Common CNC Machining Problems

Just like most current technological devices, most CNC machine problems are caused by:

1.     User error

2.     Lack of maintenance

So, the majority of issues you run into are within your control. You can do quite a bit to avoid having these problems for the future.

Here’s what to look for:

1.    If Your Material Has Burns on the Outside Edge

This is a fairly easy problem to fix. Usually, you either have a blunt tool or too low of a feed speed. 

Verify if your feed speed is right for the material you’re cutting. Also, examine your tool. If you’re experiencing issues it may be as simple as replacing your dull tooling bit with a sharper one or increasing your feed speed.

2.    Making the Same Mistake Twice

CNC machining takes a lifetime to learn. At no point should you consider yourself a “master” who has it altogether. New situations happen that require new thinking and adaptation – even by experienced experts.

So, commit yourself to always learning. When you make a mistake, see what you can do to change so it can be prevented for the future.

3.    Chatter

When your CNC machine “chatters,” it simply means it vibrates during the cutting process. Chatter can happen to either your entire machine or just its tool. Chatter harms the quality of your work, dramatically reduces the life of your tool, and can even shorten the life of your CNC machine.

To prevent chatter from ever happening in the first place, simply make sure your cut width or depth keeps deflection below 1/1000^th of an inch. Most CNC machinists also react with slowing down. 

That’s not necessarily bad, but there is a better solution. Speeding up can also work, so simply test different RPMs first.

4.    Overheating, Which Can Cause Your Entire CNC Machine to Fail

Your CNC machine can reach more than 150 degrees Fahrenheit on the inside. Filters can get clogged with dirt and debris, which can even push temperatures even higher. Of course, this can cause serious damage to your CNC machine.

Prevention mostly consists of routine maintenance. Have a regular schedule for clearing dirt and dust from your AC units and filters. Cutting fluids and metal shavings should be cleared away routinely, as they can potentially contaminate your equipment.

Overheating rarely results from problems other than these. If perform routine maintenance, you shouldn’t have to worry about any serious issues. Be sure to keep these four tips in mind as you do your work.