Is there any contamination/saliva in the chin switch, reducing it's
resistance to the point that the Omni+ thinks it is a switch closure?
Is there any pattern to when or where the faults occur?
Could it be an EMC related problem, especially if the lights and battery
gauge are flashing?
Sorry, no answers, just questions.
Geoff
G.J.Harbach
Clinical Technologist
Posture & Mobility Services
West Midlands Rehabilitation Centre
91 Oak Tree Lane, Selly Oak
Birmingham, B29 6JA
Tel 0121 627 8941
-----Original Message-----
From: A discussion list for Assistive Technology professionals.
[mailto:[log in to unmask]]On Behalf Of Wozencroft, Martin
Sent: 20 January 2005 10:37
To: [log in to unmask]
Subject: wheelchair driving unattended
Dear All,
I am working with a client with a Spectra Plus chair fitted with Penny and
Giles Pilot Plus electronics. The client drives using the
single switch scanner in the OMNI special controls module using a single
chin bead switch. He has an on/off switch also. The chair is fitted with a
dual control.
On at least four occassions the carers have described a situation with the
chair driving without the client using the switches. On at least two
occassions the dual control has been set to attendant. The lights on the
dual control have been flashing rapidly and the battery gauge similarly.
I have returned the OMNI and the Dual Control to P&G. The Dual Control
joystick was faulty but it doesn't really explain the problem.
P&G are not very forthcoming. Just recently the fault occurred again with
the dual switched to chair. I have tested the switches etc many times
without luck.
Has anyone had a similar problem?
thanks
Martin Wozencroft
Clinical Electronics Engineer
Posture, Independence and Mobility Service
Oxford Centre for Enablement
Windmill Road
Headington
Oxford OX3 7LD
Phone 01865-227600
Fax 01865-227294
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