ower pulse equivalent should be set under the condition (Page 31 / 87) CNC nk105

EasyRoute Control Panel is based on Weihong NK105 CNC Integrated Machine OEM http://am.co.za/router/panel

上海维宏电子科技股份有限公司

Weihong Electronic Technology Co., Ltd.

Lower pulse equivalent should be set under the condition of meeting the demand of feed speed.

Pulse Equivalent Setup of Linear Axis

The calculation of pulse equivalent varies with different motor systems.

¾ Stepping motor

Pulse equivalent =

360

lead screw pitch

× subdivision×mechanical deceleration ratio

stepping angle

Hereinto, mechanical deceleration ratio= rotary speed input in reducer / rotary speed output

=teeth number of driven gear / teeth number of driving gear.

For instance, the selected screw lead of X-axis for a certain type machine tool is 5mm, and the

stepping angle of stepping motor is 1.8 degree, with “10” subdivision and motor directly connected

with lead screw by coupling. Thus, the pulse equivalent of X-axis is:

Pulse

equivalent

5mm

360 ×10×1

0.0025mm/p

1.8

¾ Servo motor

Electronic

gear

ratio

encoder resolution

screw pitch

× mechanical

deceleration

ratio

pulse equivalent

Electronic gear ratio: if servo motor makes one circle per every 5000 pulse commands sent by

the system, setting electronic gear ratio of servo motor can make servo rotate twice with the same

amount of pulse commands (please refer to parameter setting of each server brand).

Please see the servo motor label plate and then refer to the corresponding manual to confirm its

encoder resolution. A label plate of YASKAWA SGMSH type motor is as below, and the 4th character

in motor type is the serial encoder specification, so the resolution of this motor is 217, i.e. 131072.

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