Digital Universal Tool Microscope Common Failure Query
1. The main optical path of the instrument does not light up, the main reason:
(1) No voltage output from the instrument power supply;
(2) Transformer fuse blown;
(3) The light system light source bulb or reading microscope bulb is damaged;
(4) the instrument base and the transformer between the wire is not connected.
2. Digital display box does not display, the main reason:
(1) instrument base and digital display box cable is not connected;
(2) digital display box back panel switch is not open;
(3) digital display box power cord is not plugged;
(4) instrument base grating sensor and digital display box between x, y coordinate signal cable is not connected;
(5) digital display box circuit short circuit, broken or damaged components.
3. Digital display box display strokes messy or unstable end display, the main reason:
(1) the microcomputer has not completed the automatic power-up, did not enter the normal programme;
(2) segment or bit scanning failure, need to replace the segment or bit drive tube;
(3) There is a source of vibration near the instrument;
4. Digital display box suddenly alarm out or miss the number of records, the main reason:
(1) Bench moving too fast;
(2) Signal cable contact is not good;
(3) Too long boot time;
(4) grating sensor main and vice grating gap changes caused by the grating sensor signal is too small. First check the cable connection, and then press the corresponding alarm coordinate zero key, such as lifting the alarm is due to the table moving too fast due to, such as can not be lifted, need to adjust the grating signal, with an oscilloscope to check the two grating signal waveform should be sinusoidal, peak-to-peak value of more than 2V and equal to the phase difference of 90 degrees, oscilloscope for the round.
5. Digital display box display value is too poor, the main reason:
Grating scale installation and table rail is not parallel, should be adjusted to the scale in the x, y direction and guide rail parallel, the error can not be greater than 10μm.
6. Press the keyboard does not respond, the main reason:
Keyboard scanning decoder is damaged.
