MC-Basic:element.JERKFACTOR

This property specifies the conversion factor between the user jerk units and the internal units [counts per msec³].

	NOTE
	In using JERKFACTOR for the group, the position units are taken from the POSITIONFACTOR of the axes within the group. The position units must not be specified in the group’s JERKFACTOR.

	NOTE
	In using JERKFACTOR for the axis, The axis JERKFACTOR must contain the conversion factor for both the position dimension and the time dimension.

Short form

<element>.Jfac

Syntax

<element>.JerkFactor = <expression>
?<element>.JerkFactor

Availability

All versions

Type

Double

Range

Greater than zero

Default

Group - 1/6e10 (=1.667e-11). This value is suitable for working in units of position units per minute per second².
Axis - 65536/6e10. This value is suitable for working in units of rpm/s² with resolver feedback.

Scope

Configuration, Task or Terminal

Limitations

Cannot be changed while axis is enabled or while axis is set up as a master axis.

To set the value within a task, the group must be attached to that task (using the ATTACH command).

JERKFACTOR is in effect only when the SMOOTHFACTOR is set to -1. Then, JERKFACTOR is always set to ACCELERATIONFACTOR/1000.

Examples

Axis
A1.Jfac = A1.Pfac/(1000³)         ‘Position units per second³

Group
G1.Jfac = 1 / (60000 * 1000 * 1000)          ‘work in per minute per second squared

G1.Jfac = 1 / (1000 * 1000 * 1000)            ‘work in per second cubed

See Also

• axis.POSITIONFACTOR