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Text version of the page
CNC Z32 - Programming guide (Milling Machines) The advantage of this profile approach, if the slope is correctly programmed, is that the tool enters in contact with the profile along the tangent, making a minimum mark on the workpiece. A disadvantage may arise when the QF computing is difficult. 3.2.2 G41 /G42 – linear approach without positions (G41/G42) It is possible to program a sequence like this: ... N20 G41 (without any position) N21 G1 X10 Y4 (G1 may be omitted, both positions are mandatory) N22 ... The block N21 specifies the first point of profile to be reached with the radius correction. The block N22 contains the first movement on the profile, with the radius correction; the movement can be chosen among those valid for the Z32 geometry, starting from the point of N21. The approaching movement will bring the tool tangent to the profile on the point programmed in N21 (the tool center will be on the vertical of the profile point of N21, with an offset equal to the radius). After programming G41/G42 without positions, a profile element in G1, G2 or G3 is normally programmed.
...G0 X... Y...G41G1 X-40 Y10 X0 Y30 G41G0 X... Y...... G1 X<-40*CS30> Y<40*SN30>G2 I0 J0 X0 Y40G1 X50 Y 0 X50... ... Y 0X 40 30010X R40 3.2.3 G41 /G42 – linear approach with final positions (G41/G42)
30° -40 Only the profile start point coordinates are programmed. The approaching initial movement is a line segment, treated at all effects as a profile element, possibly shortened if it interferes with the other profile elements. This type of approach is different from that without positions, as shown in the example:
G0 X0 Y40... G41 X0 Y20X50 40 G1 X0 Y0G41G0 X0 Y40... 40 X50... ... 20 20 X Y X Y G41/G42 without positions G41/G42 with final positions
Please note that with the G41/G42 approach with final positions, the approaching element is considered at all effects a profile element. Please note also that, differently from the approach without positions, this kind of approach may left not machined zones on the profile.
...G0 X... Y...G41G1 X-40 Y10 X0 Y30 G41G0 X... Y...... G1 X<-40*CS30> Y<40*SN30>G2 I0 J0 X0 Y40G1 X50 Y 0 X50... ... Y 0X 40 30010X R40 3.2.3 G41 /G42 – linear approach with final positions (G41/G42)
30° -40 Only the profile start point coordinates are programmed. The approaching initial movement is a line segment, treated at all effects as a profile element, possibly shortened if it interferes with the other profile elements. This type of approach is different from that without positions, as shown in the example:
G0 X0 Y40... G41 X0 Y20X50 40 G1 X0 Y0G41G0 X0 Y40... 40 X50... ... 20 20 X Y X Y G41/G42 without positions G41/G42 with final positions
Please note that with the G41/G42 approach with final positions, the approaching element is considered at all effects a profile element. Please note also that, differently from the approach without positions, this kind of approach may left not machined zones on the profile.