Default: 0
Range: 0 to 65535
The Ramp Time is used to designate the amount of time it will take to ramp to a pressure. There are two types of pressure ramps:
One type is a ramp from one pressure to another while the axis is already regulating pressure. In this case, the pressure will begin at rest at one pressure and move to another. This will involve accelerating the pressure and then decelerating down to the final pressure. The time to get from one pressure to the other will take the number of milliseconds given in Ramp Time.
The second type of ramp occurs when the axis enters pressure mode. In this case the pressure is generally not at rest at the beginning. Therefore, for s-curve ramps, only the deceleration half of the ramp is used and to ramp to a halt at the Command Pressure will take one half the number of milliseconds given in the Ramp Time field. However, the whole Ramp Time will be used in linear mode. For details on selecting s-curve versus linear ramps see the Ramp Mode Type bit description.
There are two ways to set this field:
Issue a Set Pressure (^) command, and the fourth command parameter will be the new value for Ramp Time.
Issue a Set Pressure Ramp Time (\) command, and the Command Value will be the new value for Ramp Time.
Note: In the case where the Pressure Set A field is above the Command Pressure, the pressure needs to be ramped in the reverse direction. In this case, the pressure is first accelerated and then decelerated. The Ramp Time gives the entire length of this ramp. Do not divide this time by two.
Note: Setting this field to zero will cause the Target Pressure to instantaneously jump to the Command Pressure.
Copyright (c) 1997-2015 by Delta Computer Systems, Inc.