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Chapter 18 Programming Feedrates Selecting Linear Acc/Dec Values (G48.n - - nonmodal) Programming a G48.x in your part program allows you to switch Linear Acc/Dec values in nonmotion blocks. Axis values in G48.n blocks will always be treated as absolute, even if the control is in incremental mode. Below is the format for calling G48 commands. Use this format with the axis names assigned by your system installer: G48.n X_Y_Z_ Where : In this mode : Units of measure : Sets up : Macros : XYZ G48 N/A acceleration, deceleration, and jerk ramps back to the AMPed values Important: All axis words in a G48 are ignored. N/A XYZ G48.1 in./sec2 or mm/sec2 acceleration ramps for Linear Acc/Dec mode #5631 to 5642 G48.2 in./sec2 or mm/sec2 deceleration ramps for Linear Acc/Dec mode #5651 to 5662 G48.3 in./sec2 or mm/sec2 acceleration ramps for S-- Curve Acc/Dec mode #5671 to 5682 G48.4 in./sec2 or mm/sec2 deceleration ramps for S-- Curve Acc/Dec mode #5691 to 5701 G48.5 in./sec3 or mm/sec3 jerk limits #5711 to 5722 Important: The allowable programmed range for the axis word depends on the configured format. If you exceed these allowable ranges set by your system installer, you may use paramacros to override this limit. For example, if the allowable programmed range for the axis word is 3.4 (e.g., 999.9999 max input) and the desired jerk limit is 100,000 mm/sec3, you may set Paramacro #1 to 100,000 and program a G48.5 X#1 to set the jerk limit to 100,000. This method can be used for any of the G48 programming blocks. Example 18.1 Allowable Programmed Range #1 = 100000; G48.5 X #1; Important: The part program G48.n adjustments to Acc/Dec Ramps are not applied to jog moves. The AMPed Linear Acc/Dec mode rates are used when Manual Acc/Dec mode is linear. 18-16
