How to choose CNC Router?

The choice of a CNC cutting machine depends on a number of requirements that  include technological processes and types of processed materials  on the machine. So the size of the processing area depends on the linear dimensions of the processed materials. The power of the spindle also depends on the type, hardness and qualities of the materials.

Processing technology and types of materials form a list of needed options such as IP camera, tangential knife, lubrication system, industrial marking, etc.  And systems such as automatic tool change (ATC) can significantly increase the productivity of the CNC Router. We recommend to ask our support team to make rignt choice of machine's configuration.

Where do you make your CNC Routers?

All major work on the manufacturing, assembling, adjustment and testing of machines is carried out at our workshop in the city of Kolin (near Prague). All VOLTER products have CE certificates.

 

Is it possible to order a non-standard configuration of your CNC Router?

VOLTER CNC Routers are flexible technological product. Our team can find the most effecient solution of various production tasks that our customers have.

Our engineers can  carry out all the necessary works on the design and implementation of an individual configuration of machine, its components and the dimensions of processing area.

How do you provide training and service?

After installation of each VOLTER CNC Router at the customer's workshop, the operator has training about using and maintanance of machine. The main goal of our service department is to ensure the operability of the installed equipment 24/7.

Technical support is provided depending on the each situation. It can be remote support (usually it is enough) or visit of our tecnitian to the customer's workshop. In addition to the service center in the Czech Republic, there are service centers of our dealers in a number of EU countries.

How to choose a spindle for a CNC machine?

A spindle is an electric motor on the shaft of which a working tool (milling cutter, drill) is mounted. The main characteristics of spindles are power and maximum speed.  Spindles with a maximum speed of 24,000 rpm are most commonly used in CNC machines designed for processing aluminium, plastics, and wood.

Frequency converters are used to control the rotation speed of the spindles, which allow to change the rotation speed according to the commands received from the machine control unit.

Spindles can have mechanical or pneumatic tool clamping. On spindles with mechanical clamping, the cutters are changed manually using a hook and side wrench. Pneumatic spindles allow tool changes using a button located on the spindle or an automatic tool change system. Tools are clamped pneumatically using ISO30 tapers.

The choice of spindle power depends on the materials to be processed, the required capacity and the diameter of the cutters. For milling cutters up to 6 mm in diameter, a spindle power of 4-6 kW is usually sufficient. For milling cutters of 10 mm or more, it is better to choose a spindle with a power of 10 kW or more.

Stepper motor or servomotor?

Krokový motor je řízen impulsy generovanými řídicí jednotkou krokového motoru. Každý impuls odpovídá otáčení hřídele motoru ve stejném malém úhlu. Výhodou těchto motorů je nízká cena a jednoduchost konstrukce. Hlavní nevýhodou krokových motorů je schopnost přeskočit kroky, pokud zatížení hřídele motoru překročí mezní hodnotu

The stepper motor is controlled by pulses generated by the stepper motor control unit. Each pulse corresponds to the rotation of the motor shaft at the same small angle. The advantage of these motors is their low cost and simplicity of construction. The main disadvantage of stepper motors is the ability to skip steps if the load on the motor shaft exceeds a threshold value

What is the G code?

The G code is a text file with commands to move to the specified coordinates and other commands, such as commands to set the tool number or commands to set the spindle speed. CNC machines use commands to move in a straight line and in an arc.

In modern machines, the operator does not need to know the G code commands because the G code is automatically generated from the original CAD graphic file by programs (such as Vectric, ArtCam, Fusion and others) and transferred to the machine. 

The G-code for machines from different manufacturers is different, so a postprocessor (a file that generates the G-code) is required for the CAD programs to work correctly. The postprocessor describes the format of the G code that the machine uses.

How does cutting according aiming points (IP camera) work?

The IP camera allows you to cut the printed image according to the vector.  To do this, the aiming points - black circles with a diameter of 6 mm - must be printed together with the image. Most often, 2 to 4 marks placed in the corners of the printed image are sufficient.

A cutting file is loaded into the machine, which contains aiming marks and image contours (vectors). When such a file is run, the machine uses the camera to determine the coordinates of the aiming points in the image and recalculates all the coordinates of the image outline, taking into account the location of the material on the machine working area, its rotation angle and geometric distortions created during the printing of the image.

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