Epsilon EP-P Drive Reference Manual
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Revision A4
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hit, then the axis can be jogged in the + direction.
Software Travel Limit + (SoftwareTravelLimitPlusPosn)
If the absolute position is greater than or equal to this value the SoftwareTravelLimitPlusActive source shall activate.
A rising edge occurs when the absolute position is greater than or equal to the parameter SoftwareTravelLimitPlusPosn. A
falling edge will be generated as soon as the above is not true.
Software Travel Limit - (SoftwareTravelLimitMinusPosn)
If the absolute position is less than or equal to this value the SoftwareTravelLimitMinusActivate shall activate.
A rising edge occurs when the absolute position is less than or equal to the parameter SoftwareTravelLimitMinusPosn. A
falling edge will be generated as soon as the above is not true.
3.9.3
Rotary Group
Rotary Rollover Check Box
Select this check box (RotaryRolloverEnable) to enable (or disable if clear) the rotary rollover feature.
Rotary Rollover
This parameter (RotaryRolloverPosn) is used in rotary applications and determines the position at which the internal position
counter will be reset to zero.
Example:
The user has a rotary table application with distance user units of degrees, 360.00 degrees/1 rev. The Rotary Rollover
would be set to a value of 360°.
The motor is travelling in the positive direction. As the feedback position reaches 359.999 and continues on, the feedback
position will reset (or roll-over) to zero. If the motor changes direction and travels in the negative direction, the position will
rollover at 0 to 359.999 degrees and count down. The resolution of the rotary rollover point is determined by the Distance
Units Decimal Places parameter on the User Units view in the PowerTools Pro software.
If an absolute index is used with a non-zero rotary rollover point, the Epsilon EP-P drive will calculate the shortest path to its
destination and move in the required direction.
To force the motor to run a certain direction, use the Rotary Plus or Rotary Minus type of indexes.
3.9.4
Online Tab (not shown)
While online, the following real-time data will be displayed.
Motor Position Group
Position Command
This is the commanded position in user units.
Position Feedback
This is the feedback position of the motor in user units.
Following Error
The Following Error is the difference (in user units) between the Position Command and the Position Feedback. It is positive
when the Position Command is greater than the Position Feedback.
Encoder Position
The motor position in encoder counts since power up when the value was set to zero. This is a signed 32-bit value.
3.10
Velocity View
The Velocity View allows the setup of feedrate override details.
By selecting Velocity in the Hierarchy Tree, the Velocity View will appear on the right (see Figure 45).
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