
1.AXIS CONTROL B-63783EN-1/01
- 86 -
- When ‘Smooth backlash compensation’ is required
Usually, relationship between motor position and actual machine
position can be shown as Fig.1.3.11(c). In this case, conventional
backlash compensation (compensation pulse is outputted at once when
direction changes) is enough to overcome this backlash.
Motor Position
Machine Position
Backlash
Fig. 1.3.11(c)
On the other hand, some machine has the characteristic that, torsion
between motor and machine is generated gradually after the change of
direction (Fig.1.3.11(d)). In this case, when current backlash
compensation is applied, compensation will be too much just after
reverse of direction.
Motor Position
Machine Position
Fig. 1.3.11(d)