KIN_TYP_13/14 - Face transformation

An ideal machine structure is assumed for face machining (#FACE) with kinematic IDs 13 or 14.

Mechanical offset corrections in Y direction

The effect of mechanical offset corrections depends on the machine ID for C axis face machining (P-CHAN-00008).

Characteristics of a Y offset

• With face transformation 2, i.e. P-CHAN-00008=2 - ID 14, it is impossible to pass through the rotation centre.
• The Y offset results in an enlargement of the critical zone about the rotation centre. With an ideal kinematic, however, this is only one point.
• The Y offset results in a critical zone (circle in the rotation centre) that cannot be approached.
• The dynamics in the vicinity of the critical zone are asymmetrical due to the Y offset.

The direction of rotation can be set using the HD parameter HD5.

Offset data of the kinematics

Programing Example

Change in direction of rotation in face machining

%L sub_face_mach

N10 #FACE[X, C]

N20 X1 C0

N30 $FOR P1=1, 2, 1

N40 P2 = P1*0.1

N50  G01 XP2 F2000

N[60+P1] G02 I-P2

N70 $ENDFOR

N80 #FACE OFF

M29

%main

V.G.KIN[13].PARAM[0]=1000000

V.G.KIN[13].PARAM[1]=0

V.G.KIN[13].PARAM[2]=0

V.G.KIN[13].PARAM[3]=P10*10000

V.G.KIN[13].PARAM[4]=1

N100 #SET AX[X,1,0][Y,2,1][Z,3,2][C,5,3]

N200 G00 X10 Y0 Z100 C0

N300 V.G.KIN[13].PARAM[4] = 0.0

N400 LL SUB_FACE_MACH

N500 V.G.KIN[13].PARAM[4] = 1.0 (Switch over direction of rotation)

N600 LL SUB_FACE_MACH

N700 V.G.KIN[13].PARAM[4] = 0.0

N800 LL SUB_FACE_MACH

M30

TCP position left of rotation centre

The X_TCP position and hence also the X_ACS position have no offsets on the right of the rotation centre of the workpiece rotation axis (for face_id 1 and face_id 2). Machining takes place on the right-hand side.

The TCP can also machine on the left-hand side if P-CHAN-00008=2 (face_id 2) is used. The switch-over from left to right can occur when the kinematic is inactive. Before selecting the kinematic, the X axis must be positioned at the negative position on the left of the rotation centre.