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The method of speed regulation is: after selecting the pulse width and the number of pulses, after the number of tubes is input, the voltmeter and the ammeter of the pulse source are observed. The adjustment of the frequency conversion speed will change the indication of the meter within a certain range, and the current In the small section, the follow-up adjustment will be more sensitive, and there will be a relatively dull adjustment in the fast direction. It is more appropriate to put it at the boundary between dullness and sensitivity. It can also be said to adjust to a position that is not sensitive enough but can still be processed normally.
This refers to ordinary materials, normal thickness. For some special materials or ultra-thick processing, frequency adjustment should be targeted. For materials with low conductivity, in addition to increasing the amplitude of the high-frequency source, the sampling starting voltage should also be increased and the tracking should be loosened. The processing of large thickness should also make the frequency conversion speed slightly slower. It would rather appear some no-load pulses, but also give enough time to clean the gap and restore the insulation. Over-tight tracking will cause the discharge gap to become smaller and the plated black and white stripes become lighter, but only the black and white color is light, and the finish is not good. Because the etch pit and commutation stripe are the same, it is just easier to short circuit it. If the wire looses or the tension is uneven, resulting in overfeed and a short circuit after a long time, the smoothness and efficiency are gone.
The tracking gap directly affects the machining of the wire-cutting machine tool. The tracking gap is too small, and it is prone to short cuts and fringes. Tracking is too loose, tracking is not in place, cutting is unstable. In short, it is very important to adjust the tracking gap during the wire cutting process. At present, BMW's CNC, the BMXP control system introduced, for conventional high-level processing, as long as VF select "0" system will automatically adjust the tracking according to the cutting situation, to achieve intelligent.
How to adjust the gap tracking in wire cutting machine operation?
Clearance tracking actually refers to the frequency conversion speed. The principle of frequency conversion is as follows: a sampling voltage is taken from the discharge gap, and this voltage is used to control an oscillator whose frequency and voltage are close to linear changes. The pulse it outputs is directly used as the operation of the controller and the feed start/stop signal. This realizes The gap voltage controls the feed rate. The so-called tracking tightness is artificially changing the amplitude range of the sampling voltage provided to the oscillator. The most fundamental principle of tracking and adjustment is to obtain stable processing. As long as it is stable, speed and smoothness are guaranteed. Due to the large range of automatic control of the frequency conversion circuit, under normal circumstances, the position of the frequency conversion adjustment on the panel is not very important and can be processed anywhere. However, the cutting efficiency and quality in some specific cases still have a major bearing on the frequency conversion speed.