UG后處理-Lintol以及角度超程

1、 UGS Corp. 2004. All rights reserved.1Linearization22Linearization12342.53Linearization is a post processing feature that ensure the output tool path is desirable by adding cutter locations for a linear movement when rotary axis is involved3Default Linearization ToleranceFour AxisFive Axis4LINTOLLIN

2、TOL is a post command to activiate LinearizationLINTOL/ONActiviate Linearization with default tolerance valueLINTOL/0.01Activate Linearization with 0.01 as tolerance valueLINTOL/OFFDeactiviate LinearizationNeed to be declared as User Defined post command5Output Linearization6Activate LINTOL at diffe

3、rent levelsGroup LevelDeclare LINTOL for group object, most commonly for Program Group object, then LINTOL will take effort for all operations under that group objectPost-processor LevelAdd customer command in the Start Of Programglobal mom_kin_linearization_flagset mom_kin_linearization_flag TRUEMO

4、M_reload_kinematics UGS Corp. 2004. All rights reserved.7Inverse Time Feedrade (FRN)8Rotary Axis Feedrate ProblemLinear cutting distance = 1mmDuring actually cutting, linear axis traverse distance end up = 20.3mmGiven mmpm F=20, expected cutting time is 1/20 min, but actully it takes more than 1 min

5、uteSurface cutting speed is 20.3 times slower than expectation111222Programmed tool pathActual tool path9Inverse Time Feedrate (FRN)Inverse Time Feedrate was introduced to address the feedrate problemDictate the amount of time a movement will take to completeTime = distance/mmpmFRN = 1 / TimeGiven m

6、mpm F=20, linear cutting distance = 1Time = 1/20, FRN = 0.05From postion 1 to 2, it takes 1/20 minute to complete the movement, regardless the relative postion between the cutting position and the rotary table.Inverse Time Feedrate apply to all configuration of multi-axis machines.10Defining FRN wit

7、h PB11FRN Definition12Output FRNActivate MMPMActivate MMPM13ExerciseActivity FRN and LINTOL UGS Corp. 2004. All rights reserved.14Handling Axis Limit15Rotary Axis Limit16Axis Limit Handling SequenceMOM_before_motionPB_CMD_kin_before_motionROTARY_AXIS_RETRACTPB_CMD_retract_movePB_CMD_reposition_moveP

8、B_CMD_linear_movePB_CMD_linear_move17Three PossibilitiesNo solution availableWarning generatedAlternative solution availableRetractTraverse rotary axis to alternative positionRe-engage, tool path continueRewind rotary table +/- 360RetractRewind rotary tableRe-engage, tool path continue18Retract Repo

9、sition Re-engage19In Action20ResetRewinding rotary table might not be necessary if contoller has G code to reset axisRetract/Re-engageReset21Four Axis Table Machine Step ICreate a new template block, name it as “fourth_axis_reset”, delete all words inherited22Step II Add Words23Step III Comment out Retract Move24Step IV Replace Repostion by Reset DONE25Shorter PathHeidenhain provides Shorter-path control26ExerciseCreate a 4-axis rotary table post processorUse turbine blade tool path to test the postCreate a 5-axis dual-table post processorUse impeller