In a trajactectory sequence, the helical part(in this example)is controlled stricly thru parameters and "build cut" functionality. First, draw a circle that is the dia that you want to cut. For this example, let's say it's 2.0" and you are using a 1.0" dia cutter and you want to go .500 deep. After you draw your 2.0" circle, you need to fill inthe followingparameter values:
Clear_dist=.6 ( this is how far in Z your tool will travel, be sure to axis shift down .500. the .600 value will make you cutter start .100 above your workpiece)&n bsp;&n bsp;&n bsp;&n bsp; Pullout_dist=0 (we leave this value 0 to parform a final finish pass at the bottom of the hole) Lead_radius=.5 (2.0" circle dia minus 1.0" cutter diameter= 1.0 then divide by2 =.5) Tangent_lead_step=0 (this parameter is not used)& nbsp;& nbsp;& nbsp;& nbsp; Normanl_lead_step=.5 (this value must match the lead radius so the cutter will start in the center of the hole--also, this allows you to use cutter comp without erroring out)&n bsp;&n bsp; Approach_distance=0 (this value is not used)& nbsp;& nbsp;& nbsp;& nbsp; Exit_distance=0 (this value is not used)& nbsp;& nbsp;& nbsp;& nbsp; Entry_angle=4320 (this is your (clear_ditance.6/step depth.05=12)*360=4320 DO NOT FILL IN STEP DEPTH PAREMTER--THIS VALUE IS ONLY USEDFOR CALCULATING YOUR ENTRY ANGLE) Exit_angle=360 (this value controls how manypasses your cutter will make at the bottom of the hole. 360 =1 pass, 720=2 passes, 1080=3 passes, etc....with the pullout distance=0, the tool will not lift up)
After filling out your parameters, select Build Cut, Approach, Helical--pro e will ask you to "cretae a destination point"at this point you will have to select the start point of your circle, a red arrow will appear on your screen after selecting the point--if the direction looks correct--pick OKAY. At this point your helical lead in will appear on your screen. Now, we have to create a helical exit. Pick Buildcut, EXIT, HELICAL-- a red arrow will appear on your screen indicating which direction the exit will go. If the arrow direction looks correct, select okay-- now your Helical exit is complete and there should be a normal lead step that positions the cutter back to the center of the hole. Note--since our pullout distance is set to 0.0 and the exit_angle is 360, the cutter will perform 1 final pass at the bottom of the hole.
hope this helps, Paul
