Working discs / cutters
The largest number of discs or cutters (see "Work item") that can be installed on the tool at the same time. However, cutters are used only
one at a time — this is due to their technical features. But several disks can be installed at once — usually
2, less often
3 or more.
The "repeated" tool is very useful for situations where you need to cut a wide furrow — wider than the thickness of the disc. With one disc, two passes would have to be made for this (along one edge of the furrow and along the second), and besides, manually control the parallelism of both slots. 2 or 3 disks allow you to cope with the task in one pass, and you do not need to monitor parallelism — the distance between the slots remains unchanged anyway. This distance can usually be adjusted; see "Working Width" for details.
Functions
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Self -propelled. A feature found exclusively in joint cutters (see "Device"). Such a tool has a wheel drive and is able to move independently; the travel speed during operation adjusts to the cutting speed. At idle, it is also low; however, the self-propelled design saves a lot of operator effort, especially when it comes to powerful heavy units — for them wheel drive is almost a must.
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Soft start. Function applicable to models with an electric motor (see "Type"). Without a soft start system, the motor consumes high current at the time of starting, which leads to noticeable voltage fluctuations in the network; and spinning up to operating speed occurs very quickly, with a jerk — as a result, if the hold is not strong enough, the tool can be released from the hands. Soft start avoids these phenomena: the control electronics limits the starting current, preventing power surges and sharp jerks of the tool.
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Maintain momentum. Maintaining constant engine speed regardless of the load on the disc / cutter. For this, electronics are used that control the power of the engine: at a low load, the power decreases, and with an increase in resistance, it increases, due to which the speed of rotation of the disk / cutter remains unchanged. Working at a constant speed has a positive effect on both the quality of processing and the service life of the discs / cutters.
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— Electronic engine protection. Control electronics to prevent damage to the tool when overloaded or overheated. In the event of critical situations, such a system turns off the power to the engine in order to avoid breakdowns. You may need to press the unlock button to continue working. Such protection is found only in electric motors (see "Type").
— Brushless motor. The presence of such an engine provides a number of advantages over traditional collector engines: in particular, they are more economical in terms of energy consumption, less noisy, and also do not spark, which can be important in conditions of increased fire danger. The disadvantages of brushless motors are complexity and high cost.
— Safety clutch. Special coupling located between the motor shaft and the spindle; may be disposable or reusable. With a critical increase in resistance on the disk / cutter (for example, if the disk is jammed), this clutch is destroyed or opened, preventing engine damage and sharp jerks of the tool. This type of protection is also found in electric tools and in units with internal combustion engines (see "Type").
— Laser marker. Indicator light showing where the cut line will go when the tool is moving straight ahead. This feature is especially convenient since the blade or cutter is usually hidden from the operator's eyes by a protective cover.Cable length
The length of the network cable can tell you how far from the outlet you can operate the device. Therefore, for domestic use, it is more relevant to choose models with a short cord, for construction work or use in production, in the garage a longer cable is better.
