Buying a large format scanner is similar to buying a small format scanner
with a few variations.
There are two general types, flat beds (up to 54 inches on a side) and roll
types. In the flat beds, the scanner head moves over the paper that is fixed
on a platten. In the roll type, the paper is fed beneath a fixed scanner
head. Some large flat beds are still made, but in the past 10 to 15 years,
the roll type taken over the market. (they have a smaller foot print, are
lighter, advances in mechanical precision of the internal mechanics now
allows them to produce superior scans,they can scan any length of paper,and
they can scan mylar and clear film)
the primary cost difference depends on whether you need grey scale only or do
you need color. Never get a pure black and white only scanner (any dust on
the original will show up as black dots). The second cost factor is the
width of the scanner (24, 36, 48, 54 inches wide). The third is scanning
speed.
Generally, you do not need more than 600 dpi for a large format scanner. (400
to 600 dpi is fine unless you are doing huge blow-ups). If you are doing
lots of scanning, you will also need a dedicated computer and an operator.
there are two costs you need to be concerned with. The inital cost of the
unit ($10,000 to 90,000 US) and the annual maintenance fee (up to $5000 US
per year). If you do not get a maintenance contract, be prepared to pay for
a technician to come to your office (that includes: plane fare, hotel,
generally 12 hours minimum fee at up to 250 per hour, plus parts [this is
where they really get you- the main light bulb can cost $900 or more]}.
good quality makers of scanners include Vidar and OCE. There are several
others- you just have to look around. High end makers include Anatec (you
can spend 100,000 or more for their scanners). The main difference in cost
is width and scanning speed.
Ocassionally, used large format scanners show up on e-bay. Becareful of
them. There has been s a huge advance is scan camera technology in the past
ten years. Equipment that is 10-12 years old is almost cost prohibitive to
keep running (many parts are no longer available.). Things to look out for
in a used scanner - how old is the main light bulb (they have to be replaced
every couple of years - assume $1000 cost). Does the scanner have the
software? (most manufactures have their own software - can cost $1000 to
4000 to purchase it). what is the condition of the feed rollers? If a
scanner can scan transparencies (ie: mylar), it has a white roller. Over
time, that roller can become discolored (replacement can cost $1000 to 2000).
What is the condition of the cameras? In the older units, the cameras (up
to 8 of them) had to be replaced every 4 to 6 years ($1500 each plus aligment
by a technician). The mechanical drive units are fairly robust and little
goes wrong with them {except during shipping}. Most companies will send out
a technician to set up a used machine at your office for a 1000 to 1500 fee
(that is generally included with a new machine, but check first).
I looked into this several years ago. I eventually made a deal with my local
Kinko's. I send them a minimum amount of business and they charge me a flat
fee for any sized scan.
>>>>>
The authority I work for are looking to purchase a large format scanner for
use with MapInfo (scanning building plans and locational plans) I have
looked through the archives of MapInfo L-List and have found two similar
requests from Brian Gallant in 1998 and Chad Landgraf in 2000 but no replies
to them. Brian and Chad did you ever find the right scanner and can you give
me any tips. If anyone can point me in the right direction within the UK I'd
be grateful.
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