Frequently Asked Questions about Digital Universal Tool Microscope
1. The main optical path of the instrument does not light up. The main reasons are:
(1) The instrument power supply has no voltage output;
(2) The transformer fuse is blown;
(3) The light source bulb of the light path system or the reading microscope bulb is damaged;
(4) The wires between the instrument base and the transformer are not connected properly.
2. The digital display box does not display. The main reasons are:
(1) The cables between the instrument base and the digital display box are not connected properly;
(2) The switch on the back panel of the digital display box is not turned on;
(3) The power cord of the digital display box is not plugged in properly;
(4) The x and y coordinate signal cables between the grating sensor and the digital display box on the instrument base are not connected properly;
(5) There is a short circuit, open circuit or component damage in the digital display box circuit.
3. The strokes displayed on the digital display box are messy or the last digit display is unstable. The main reasons are:
(1) The microcomputer has not completed automatic power-on and has not entered the normal program;
(2) If the segment or bit scan fails, the segment or bit drive tube needs to be replaced;
(3) There is a seismic source near the instrument;
4. The digital display box suddenly goes off the alarm or misses counting. The main reasons are:
(1) The workbench moves too fast;
(2) The signal cable is not in good contact;
(3) The boot time is too long;
(4) The change in the gap between the main and auxiliary gratings of the grating sensor causes the signal of the grating sensor to be too small. First check the cable connection, and then press the corresponding alarm coordinate clear key. If the alarm is cleared, it means that the workbench moves too fast. If it cannot be released, the grating signal needs to be adjusted and checked with an oscilloscope. The waveforms of the two grating signals should be It is a sine wave, the peak-to-peak value is greater than 2V and equal, the phase difference is 90 degrees, and it is circular on the oscilloscope.
5. The display value of the digital display box is out of tolerance. The main reasons are:
When the grating ruler is installed, it is not parallel to the guide rail of the workbench. The grating ruler should be adjusted to be parallel to the guide rail in the x and y directions, and the error cannot be greater than 10 μm.
6. There is no response when pressing the keyboard. The main reasons are:
The keyboard scan decoder is damaged.
