Summary of Significant Accounting Policies Part 1 (Details) (USD $)	12 Months Ended
	Oct. 01, 2011	Oct. 02, 2010	Oct. 03, 2009
Summary of Significant Accounting Policies [Abstract]
Number of weeks include in the fiscal year (in weeks)	52	52	53
Maximum number of months for manufacturing and delivery that divides short and long term contracts for revenue recognition (in months)	6
Foreign currency [Abstract]
Net foreign currency transaction (losses)/gains	$ 500,000	$ (100,000)	$ (1,600,000)
Inventory disclosure [Abstract]
Customer projects in various stages of completion	19,026,000	16,126,000
Components, assemblies and parts	46,961,000	35,666,000
Total	65,987,000	51,792,000
Amortization [Abstract]
Amortization expense	3,300,000	3,000,000	2,400,000
Warranty obligations [Abstract]
Life of warranty obligations, minimum (in months)	12
Life of warranty obligations for sales, maximum (in months)	24
Number of previous months historical warranty claims used to calculate warranty expense percentage (in months)	12
Warranty provisions and claims [Roll Forward]
Beginning balance	7,505,000	9,774,000
Warranty claims	(5,679,000)	(7,036,000)
Warranty provisions	2,970,000	5,439,000
Adjustments to preexisting warranties	518,000	(496,000)
Translation adjustment	(24,000)	(176,000)
Ending balance	5,290,000	7,505,000	9,774,000
Building and improvements [Member]
Property and equipment [Abstract]
Useful life in years, minimum (in years)	10
Useful life in years, maximum (in years)	40
Machinery and equipment [Member]
Property and equipment [Abstract]
Useful life in years, minimum (in years)	3
Useful life in years, maximum (in years)	10
Software development costs [Member]
Amortization [Abstract]
Amortization expense	$ 1,500,000	$ 1,300,000