What is a lot more, we also give iPad and tablet stands, which can keep tablets for displaying a virtual existence at exhibitions, trade fairs and various events. incorporating friction on the wheel joints only is effective when I deliver non-zero velocity commands on the robotic (see video at the https://www.uk-exhibitionstands.co.uk/maximise-your-brand-impact-with-a-bespoke-exhibition-stand-from-uk-exhibition-stands/