Ramp time weighting (G132/G133/G134/G233/G338/G339)
Syntax of weightings for ramp time: | ||
G132 <axis_name>. | Axis-specific ramp time weighting, weighting for specific axes in [%], only acts on feed blocks G1/G2/G3. | modal |
G133=.. | Axis group-specific ramp time weighting with G01, G02, G03, weighting for all axes in [%] | modal |
G134=.. | Axis group-specific weighting of geometrical ramp time, weighting for all axes in [%] | modal |
G233=.. | Axis group-specific ramp time weighting with G00, weighting for all axes in [%] | modal |
Weightings for ramp times in feedhold: | ||
G338 <axis_name>. | Axis-specific ramp time weighting with feedhold, weighting for specific axes in [%] [as of V3.1.3079.16] | modal |
G339=.. | Axis group-specific ramp-time weighting with feedhold, weighting for all axes in [%] [as of V3.1.3079.16] | modal |
These ramp times can be influenced by a percentage change in the corresponding default ramp times. The G132/G133/G233 functions can change the ramp time of axis acceleration with a non-linear slope [2]-1. (If the slope is linear, the acceleration curve is step-shaped (see figure in Section Jerk-limiting slope)
The G134 function can change the geometrical ramp time of a non-linear slope (P-AXIS-00199).
The parameters for acceleration ramp times for the up-gradation and down-gradation of acceleration are P-AXIS-00196 and P-AXIS-00195 respectively, and for the up-gradation and down-gradation of deceleration, the parameters are P-AXIS-00198 and P-AXIS-00197 respectively.
When P-CHAN-00097 is set, the feedhold parameter list is used for the deceleration process. In this case, the deceleration of the feedhold ramp P-AXIS-00081 by a percentage change using G338/G339.
When the function is programmed with G132/G133/G134/G233/G338/G339, all axes which are not programmed or not yet programmed are set to 100%. Every additional selection of these functions, irrespective of previous programming, refers to 100%. This means that geometrical data processing always weights default values with the percentage value. Therefore, 50% programmed twice in succession means the setting is made to 50% and not to 25%.
Notice | |
After an axis exchange, the G132/G333 weighting factors are reset for all axes involved to 100%. |
 | Ramp time weighting does not act on single axis motions e.g. homing, manual more an independent axes. |
Programming Example
Ramp time weighting (G132/G133/G134/G233/G338/G339)
N10 G132 X200 | ;Axis-specific weighting of ramp time ;Ramp time of X axis is increased by 200% |
N20 G01 F1000 X100 | ;Linear interpolation |
N30 G132 Y50 | ;Ramp time of Y axis is decreased by 50% ;Ramp time of X axis remains at 200% |
N40 Y100 | ;Linear interpolation |
N50 G133 = 100 | ;Axis group-specific weighting of ramp time ;G01,G02,G03 ramp times of all axes to 100% |
N60 G134 = 50 | ;Axis group-specific weighting of ramp time ;Geometrical ramp time of all axes to 50% |
N70 G233 = 80 | ;Axis group-specific weighting of ramp time ;G00 ramp times of all all axes to 80% |
N80 G00 X200 | ;Rapid traverse |
N90 G338 X150 | ;Axis-specific weighting of ramp time ;with feedhold. Ramp time of X axis is increased to ;150%. |
N100 G339 = 200 | ;Axis group-specific weighting of ramp time ;with feedhold. Ramp time of all axes is increased to ;200%. |
Special feature: | |
N50 G133 = 100 X10 Y20 | ;With G133/ G134/G233/G339 axis positions can ;also be programmed in the same block! |
The figure below shows the influence of G134 on acceleration perpendicular to the path (centrifugal acceleration a1--> a2) with increasing feed (v1 --> v2) during circular motion (P1 --> P2).
If the change in centrifugal acceleration is reduced by increasing the G134 ramp time, acceleration is smoother and target acceleration a2 is not reached until point P3.
