Tsino Dynatron CoolDrive Series, User Manual

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Application functions
174
Electronic gear ratio 8.2
Overview 8.2.1
Electronic gear ratio is the coefficient of conversion from the user position command unit to the drive's internal position
unit. User position command unit refers to the actual position unit of load movement and is often intuitive units of distance or
angle (such as mm or °), while the drive's internal position unit is usually the minimum measuring unit of motor encoder
single-turn. Therefore, by using electronic gear ratio, 1 unit of user position command can be converted into the corresponding
increments of motor encoder in the servo drive, and then directly involved in the control, so that the user can plan and issue
position commands easier and more intuitively.
CoolDrive Smart7 also supports the electronic gear ratio settings specified by CiA402 as well as the use of electronic gear
ratio numerator and denominator settings.
Associated parameters 8.2.2
The parameters for setting the electronic gear ratio function are as follows.
Index Name Unit Setting range Default value effective Period
0x608F.01
Position Encoder Resolution -
Encoder Increments
EncInc 1-4294967295 131072 Read-only Y
0x608F.02
Position Encoder Resolution -
Motor Revolutions
Rev 1-4294967295 1 Read-only Y
0x6091.01
Gear Ratio-Motor Shaft
Revolutions
Rev 1-4294967295 1 Restart Y
0x6091.02
Gear Ratio-Driving Shaft
Revolutions
Rev 1-4294967295 1 Restart Y
0x6092.01 Feed Constant-Feed PosUnit 1-4294967295 1 Restart Y
0x6092.02
Feed Constant-Driving Shaft
Revolutions
Rev 1-4294967295 1 Restart Y
0x6093.01 Position Factor Numerator — 0-4294967295 1 Restart Y
0x6093.02 Position Factor Denominator — 1-4294967295 1 Restart Y
1. The [Position Encoder Resolution - Encoder Increments] is a read-only parameter, which is
automatically set according to relevant parameters of the first or second encoder after power-on. If
EncInc is selected as the position unit dimension index, the resolution of the position commands issued
by the upper computer shall refer to this parameter.
2. The [Position Encoder Resolution - Motor Revolutions] is a read-only parameter, fixed at 1.
3. The displacement unit of [Feed Constant-Feed] is determined by 0x6089 and 0x608A.