Canon GM-1000 ユーザーズマニュアル

 

CANON  Digital Galvano Scanner System  GM-1000 Series 
Users Manual 1.20 
 
 

21

This section explains the relationship between the galvano scanner motor rotating angle and the 

number of encoder pulses. 

Control commands and some of the parameter angle settings use the number of encoder pulses. 

The controller divides one encoder cycle into 8,192, and this is the number of encoder pulses. 

Depending on the type of encoder included on the motor, caution is necessary as the number of 

pulses for the same specified angle can differ.   

Many commands use pulses as a unit in the RS-232C communication command parameter data used 

for operations. 

 

In the case of the GM-1010 for example 

1 rotation (360°) = 1,000 cycles = 1,000 × 8,192 = 8,192,000 pulses 

 

1° (angle of equipment) = 8,192,000 pulses × 1 / 360 = 22,756 pulses 

 

Resolution = 360° ÷ 8,192,000 pulses = 0.0000429° = 0.77 urad 

Each motor is as follows. 

Motor type 

GM-1010 

GM-1015, GM-1020 

Included encoder cycles / 1 

rotation 

360° 

1,000 cycles 

1,500 cycles 

Number of pulses 

8,192,000 pulses 

12,288,000 pulses 

Command resolution (1 pulse) 

0.77 urad 

0.51 urad