Simple Contact Problem

[siramirsaman]

Hi Everyone,

I am new to abaqus. I have a problem with a simple contact problem. I have
two rollers that move across a shaft.

For the rollers, I used the Hinge connection on both the two wheels and
their stands.

Except for the shaft, the rest of the parts are all rigid bodies defined by
constraint.

My problem is, whenever I introduce a contact interaction,
surface-to-surface or general, the two rollers stick to the shaft and do not
move with the rest of the body, although I have Tied the rollers to the
body.

Any help and comments will be really appreciated.
Cheers.