About Joints

aremind.gif (956 bytes)

DMU Kinematics Simulator lets you define and edit 16 different joint types.

The tables below describe the joint types and their characteristics:

DMU Kinematics Simulator lets you define the following joints using axis systems:

  • u joint

  • prismatic

  • revolute

  • cylindrical

  • spherical

V4 NAME

JOINT TYPE

DEGREES OF FREEDOM

COMMAND TYPE

DIRECT MANIPULATION

revolute

Revolute 

I_RevoluteJntP2.gif (246 bytes)

1 Rotation

Angle

YES / Left-mouse button

prismatic

Prismatic 

I_PrismaticJntP2.gif (238 bytes)

1 Translation

Length

YES / Left-mouse button

actuator

Cylindrical 

I_CylindricalJntP2.gif (235 bytes)

 

 

1 Rotation
1 Translation

 

 

Length + Angle

Length: Left-mouse button

Angle:
Left-Mouse button + Middle-Mouse button

AND/OR

Angle or Length

YES / 
Left-mouse 
button

 

pt/pt

Spherical 

I_SphericalJntP2.gif (234 bytes)

3 Rotations

_

NO

planar

Planar 

I_PlanarJntP2.gif (182 bytes)

2 Translations
1 Rotation

_

NO

rigid

Rigid 

I_RigidJntP2.gif (248 bytes)

_

_

NO

roll/crv

Roll Curve 

1 Rotation
1Translation

Length

NO

slid/crv

Slide Curve 

2 Rotations
1 Translation

_

NO

pt/crv

Point Curve 

3 Rotations
1 Translation

Length

NO

pt/surf

Point Surface  

2 Translations
3 Rotations

_

NO

u jnt

U Joint 

1 Rotation

_

NO

gear

Gear joint

1 Rotation

Angle1 or Angle2
(exclusive)

YES / Left-mouse button

rack

Rack Joint

1 Rotation or
1 Translation

Length1 or Angle2
(exclusive)

YES / Left-mouse button

cable

Cable Joint

1 Translation

Length1 or Length2

YES / Left-mouse button

screw

Screw Joint

1 Rotation or
1 Translation

Angle or Length
(exclusive)

YES / Left-mouse button

cv joint

CV Joint

_

_

NO

ainfo.gif (980 bytes)

Only the joints which are assigned a command can be manipulated.

JOINT TYPE

SELECTIONS

RATIO

 

*CONDITIONS

 

   
sel.1
sel.2
sel.3
sel.4
sel.5
sel.6
   

Revolute 

 

I_RevoluteJntP2.gif (246 bytes)

Line

 Line

Plane

Plane

Plane

Plane

_

(1)(2)(3)(6)

Prismatic 

 

I_PrismaticJntP2.gif (238 bytes)

Line

Line

Plane

Plane

_

_

_

(1)(2)(4)

Cylindrical 

 

I_CylindricalJntP2.gif (235 bytes)

Line

Line

_

_

_

_

_

(1)

Spherical 

 

I_SphericalJntP2.gif (234 bytes)

Point

Point

_

_

_

_

_

(1)

Planar 

 

I_PlanarJntP2.gif (182 bytes)

Plane

Plane

_

_

_

_

_

(1)

Rigid 

 

I_RigidJntP2.gif (248 bytes)

Product

Product

_

_

_

_

_

(1)

Roll Curve 

 

Curve

Curve

_

_

_

_

_

(1)

Slide Curve 

 

Curve

Curve

_

_

_

_

_

(1)

Point Curve 

 

Curve

Point

_

_

_

_

_

(1)

Point Surface  

 

Surface

Point

_

_

_

_

_

(1)

Universal Joint 

 

Line

Line

Line

_

_

_

_

(1)(5)

Gear Joint

Revolute

Revolute

_

_

_

_

Ratio

(7)

Screw Joint

Line

Line

_

_

_

_

Ratio

(1)

Cable Joint

Prismatic

Prismatic

 

 

 

 

Ratio

(7)

Rack Joints

Prismatic

Revolute

 

 

 

 

Ratio

 

CV Joints

U joint

U joint

 

 

 

 

 

(7)(8)

*Conditions between selections:

(1)

selection 1 in another product than selection 2

(2)

selection 3 in either first selections' product, selection 4 in the other

(3)

line orthogonal to plane of same part

(4)

line lying in plane of same part

(5)

line 'selection 3' must be in either first selections' product and cross selection

(6)

selection 5 and 6 are optional ('centered case'); selection 5 in either first selections' product, selection 6 in the other

(7)

compound joints are based on basic joints selection or on-the-fly creation: a part is shared by the two joints

(8)

requires equal input and output angles