Tappingspeed

This can affect the adhesion of any artificial products, such as regular nail varnish, UV gels or powder polymer or liquid monomer. It also weakens the nail and opens it up to penetration by unwanted substances. The lower and younger layers are attached firmly to the nail bed epithelium which, in turn is attached to the nail bed by a series of grooves.

In the example image, the values ​​of RPM and Feedrate have been set to 0 to highlight that these values ​will be calculated from the other parameters. In this case, a 6mm diameter cutter with 3 teeth, a tooth load of 0.01mm per tooth and a surface speed of 150m/min.

Nails do not grow from the nail bed. The nail bed is an area under the nail where it is attached to the end of the finger and provide the nail with essential oils and moisture to keep it healthy and flexible. Nails grow from an area under the skin at the base of the nail called the matrix

Suppose our machine is limited to a maximum speed of 2000 mm / min, we will enter that value as the feed rate (instead of 3183.2). We can then try different possibilities for other suitable values. In this case, we can recalculate the spindle speed, for example (depending on the feed rate) by clicking on button 4. This will give us a spindle speed of 5000 rev / min.

The speeds and feeds calculator is accessed from the context menu shown when right clicking a machining operation. This can be used to calculate feed rates, spindle rpms and other machining parameters.

Nail technicians carry out physical and chemical procedures to beautify, extend and enhance the nail plate’s appearance; and as professionals we have a responsibility to maintain and enhance the nail plate’s health.

It is not always possible to use the ideal values ​​calculated. The spindle may not turn fast enough, or, conversely slow enough. The machine may also not be able to achieve the required feed rate. In these situations, it will be necessary to compromise and change the values ​​to suitable limiting values.

The nail plate is continuously formed from the matrix of the nail unit. Modified skin cells keratinise in the matrix and push older cells forward.  The journey from the matrix (which is a delicate area under and behind the base of the nail) to the free edge takes approximately 5 months.

The general working method is to start with the Number of flutes and Diameter properties, which should remain fixed. Then enter the recommended Tooth Loading and Surface Speed values suggested for the cutter / stock material combination, taken from reference or manufacturer data.

If we had wanted to keep the same RPM speed (7958) for this feed rate of 2000 mm / min (and thus keep the recommended surface speed), we could use button 1. to calculate a new Tooth Loading. This would give a value of 0.0628 mm/tooth.

SFM to RPM

Buttons 1, 2 and 4 are used to calculate the value of their associated parameters if the feedrate or RPMs need to be manually modified to limiting values. The rotational speed (RPM) has 2 buttons because it can be calculated either taking into account the Feedrate and Tooth Load , or the Surface Speed .

Image

The buttons numbered 1 through 5 on the image are used to calculate a parameter based on other variables. The formula, and dependent variables used, are shown to the right of the calculate buttons.

The nail plate is created in the nail matrix, where skin cells are modified and keratinised to become the hard, flat cells of the nail plate. It is the most visible part of the whole nail unit, covering the area from the nail matrix to the free edge and beyond. While it may appear to be one piece, it is constructed from multiple layers of nail cells. As it grows it moves across the nail bed, held in place to the dermis beneath by nail bed epithelium, and kept within the lateral nail folds by the nail grooves along each of the sidewalls.

Suppose our spindle does not drop below 10,000 rev / min, we can calculate the other parameters according to this speed. Enter 10000 for RPM.

Many other factors will also need to be taken into account when judging appropriate speeds and feeds, such as: Machine rigidity and backlash, Spindle power, Sharpness of tooling, Depth of cut, Finishing or Roughing operations etc.

Some information (such as Tool Diameter and Cut Feedrate) may be taken from the machining operation selected, or from the tool libraries (Num Flutes). No information is currently fed back into the machining operation, so the results of any calculations will need to be manually copy and pasted into the appropriate parameters.

The tough upper layers are slightly thicker than the lower layers and form a protective barrier. These upper layers should NEVER be buffed off during any nail service. Buffing the top layers off exposes softer layers below.

The cutting parameters selected for this second example are: Tool Diameter 6mm, 4 teeth, feed 0.1 mm / tooth, cutting speed 150 m / min

The values of Feedrate and RPM, suggested by the formulas, may not be possible given the limitations of the CNC machine. In these cases, the machine's limits will be fed back into the calculation to determine the effect this will have on the tooth loads and surface speeds.

The function of the nail plate is to create a rigidity for the end of the finger allowing the fingers to function efficiently in all their dexterity requirements e.g picking up small objects. It is also a protection for the last bone of the fingers and toes which would otherwise get easily damaged

1) Clicking button 5, will calculate the spindle speed (RPM) from the surface speed and tool diameter. In this example, we get 7958 rev/min.

Next, calculate the other values ​to reflect the new spindle speed. In this case, the Feedrate and Surface Speed values. Click button 3 to calculate the new Feedrate based on the revised RPM value. The result in this example is 300 mm / min. Clicking button 2 will recalculate the Surface Speed, also based on the revised RPM value. In this example the revised Surface Speed is 188.5 m / min. If this is outside the range of recommended cutting speeds, extra care should be taken and the machining strategy may need to be revised.

Speed and feed formulas should also be considered as a rough guideline and are no substitute for practical experience gained, working with specific machines, cutters and materials. The formulas are often based on reference data which assumes optimal cutting conditions, coolant, rigid machines, and are often targeted towards industrial applications to optimise productivity and not necessarily tool life.

2) Clicking button 3 will then calculate the feed rate from the spindle rpms calculated in step 1, the tooth load and number of flutes. In this example the result is 238.74 (m / min).

As with the previous example, we recalculate the Surface Speed (button 2) to verify that we are still within an acceptable range. In this case we get 94.25 m / min.

The speeds and feeds calculator is rather basic at the moment. It requires an understanding of the theory of the calculations involved. It will also require information from external references, such as tooling data sheets from cutter manufacturers, and machinist's lookup tables.