Tsino Dynatron CoolDrive Series, User Manual

Page: 187 / 285

Application functions
175
How to use 8.2.3

Electronic gear ratio setting mode 1
Setting mode 1: Use the objects 0x608F (Position Encoder Resolution), 0x6091 (Gear Ratio) and 0x6092 (Feed Constant)
specified by CiA402 to set the electronic gear ratio. The actual physical meanings of each object are shown in the figure below.
motor
ball screw
encoder
Feed Constant =
Feed
Displacement
/ PosUnit
Driving Shaft
Revolutions
/ rev
Motor Revolutions/ rev
reduction
gears
Encoder
Increments
/ EncInc
Feed
Displacement
Driving Shaft
Revolutions
Gear Ratio =
Motor Shaft
Revlutions
Driving Shaft
Revolutions
Encoder Resolution =
Encoder
Increments
Motor
Revolutions
workpiece
（Motor Shaft Revolutions）
The electronic gear ratio is calculated by the following formula:
Electronic gear ratio =
Encoder Resolution
×
Gear Ratio
Feed Constant
=
Encoder Increments
(0x608F.01)
Motor Revolutions
(0x608F.02)
×
Motor Shaft Revolutions
(0x6091.01)
Driving Shaft Revolutions
(0x6091.02)
Feed Displacement
(0x6092.01)
Driving Shaft Revolutions
(0x6092.02)

Electronic gear ratio setting mode 2
Setting mode 2: Directly use the [Position Factor Numerator] (0x6093.01) and the [Position Factor Denominator]
(0x6093.02) to set the electronic gear ratio.
The electronic gear ratio is calculated by the following formula:
𝐸𝑙𝑒𝑐𝑡𝑟𝑜𝑛𝑖𝑐 𝐺𝑒𝑎𝑟 𝑅𝑎𝑡𝑖𝑜 =
Position Factor Numerator
（
0𝑥6093.01
）
Position Factor Denominator
（
0𝑥6093.02
）

Selection between mode 1 and mode 2
When the parameter [Position Factor Numerator] (0x6093.01) is 0, mode 1 is adopted to set the electronic gear ratio;
When the parameter [Position Factor Numerator] (0x6093.01) is a non-zero value, mode 2 is adopted to set the electronic
gear ratio.
1. If the numerator or denominator of a fraction is not an integer when setting the electronic gear ratio
in the above way, the numerator and denominator shall be proportionally multiplied so that both are
integers.
2. When the [infinite position mode] is enabled, the electronic gear ratio can only be set to 1.