Kinematic structure

Tripod kinematics
Tripod kinematics

Machine type: 3-axis machine (3 axes + spindle)

Axis identifiers as per the machine labelling

Axes in the tool: Z1, Z2, Z3,(Spindle B)

Axes in the workpiece -

Axis configuration in the sda_mds.lis: X, Y, Z

Offset dimensions of strut kinematics
Offset dimensions of strut kinematics

Kinematics ID

Axis sequence

12

X, Y, Z (Z1, Z2, Z3)

Parameter

Offset

List

Meaning

HD1

kinematik[12].param[0]

z offset tool

HD2

kinematik[12].param[1]

x offset tool

HD3

kinematik[12].param[2]

y offset tool

HD4

kinematik[12].param[3]

z offset machine axis zero point.

HD5

kinematik[12].param[4]

Radius to connecting line joint centre points drive columns

HD6

kinematik[12].param[5]

Radius to connecting line joint centre points Steward platform.

HD7

kinematik[12].param[6]

Strut length to each joint centre point

HD8

kinematik[12].param[7]

Switch for switching to non-ideal tripod (enable HD9 / HD 10)

HD9

kinematik[12].param[8]

Angle column / joint 3 to column / joint 1

HD10

kinematik[12].param[9]

Angle column / joint 3 to column / joint 2

Axis configuration and kinematic offsets

Excerpt from the channel parameter list:

# Define axis configuration

# =================================

gruppe[0].achse[0].log_achs_nr 1

gruppe[0].achse[0].bezeichnung X

#

gruppe[0].achse[1].log_achs_nr 2

gruppe[0].achse[1].bezeichnung Y

#

gruppe[0].achse[2].log_achs_nr 3

gruppe[0].achse[2].bezeichnung Z

#

# Define kinematic parameters

# =================================

kinematik_id 12 Tripod

#

# Offsets in 0.1 æm

# Tripod

kinematik[12].param[0] 500000

kinematik[12].param[1] 0

kinematik[12].param[2] 0

kinematik[12].param[3] 9100000

kinematik[12].param[4] 4585000

kinematik[12].param[5] 725900

kinematik[12].param[6] 7020000