Tuesday, 29 August 2017

Helpful Guides For Using Small CNC Turning Machines At Home

By John Hill


Turning machines are tools for cutting with non rotary bit moving linearly while the material rotates. Their movement axes are either a straight line, with curves or with angles but essentially are linear and intended for external surfaces. If applied on internal surfaces, the process is called boring and together they are categorized as lathing.

These processes are traditionally done manually with an operator supervising them while recent ones are automated and supervision is not needed. The latter are done with CNC turning machines in CT where computer programs control the operation. Early versions of these creates complex geometric figures although it has become pretty rare for them to get created.

Turning process are executed usually by lathe that has four various types like profiling, taper, straight and external grooving. These could produce different shapes in workpieces such as curved, conical, straight and grooved. If you own at home a small machine and want to do this process for personal projects you have then these guides could help you when followed.

Buy carbide cutters that are high quality from brands you trust to achieve results which are better instead of buying those from no names that are inexpensive. They have the tendency to easily break specially when being used with metals that results to constant replacements and more expenses. Most expensive ones are not needed as long as you buy from brand with favorable reviews and good reputation.

Buy calculators of feeds and speeds, that are feed rate and the cutting speed respectively, for making sure they will be precisely set. The latter is speed difference between cutter and workpiece surface and the former is velocity the tools have when advanced along. Correct precision is required by tough materials and without calculators, calibrating them is impossible.

Determine the correct cut depth and width which is important to avoid tool deflection or bending that can cause accuracy problems. This will add to chip load, or the thickness of removed material, and contributes greatly to early breakage. Deflection also reduces CNC accuracy because the instrument is not on its exact location as expected by the code.

Small machines commonly have issues of easily moving around when they work with powerful force because they lack weight required. This is unlike larger ones that can handle jobs with high power like cutting stainless steel. Reduced the force used in your cuts according to their size so they would stabilize when using them.

Some consumer grade machines have toolholders which are cheap that would not endure pressures from tough materials. Toolholders are those steel bar with shanks clamped to a machine while the other side has a clamp to hold interchangeable tools. If cutters break often, either you need to reduce the chip load or have your toolholders upgraded.

Make sure coolant is being used that could reduce some related issues with cutting several tough materials like material hardening and heat retention. Therefore, using one while working with difficult materials will be a better idea. Some guides are there which could help you while your local shops can be visited if you like to ask more questions.




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