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Calibration Procedures (continued)
Mechanical Assemblies
Check all assemblies and bearings are tightened, free moving and clean.
We are assuming here that the system has not been dismantled or tampered with since installation. If it has email
support for help. The systems are manufactured originally to very good standards and actually are very strong so
we should be able to help you.
Bearings - PDR use mostly THK linear bearings of the highest quality and our experience shows bearings will last
the life of the system. We have 15 year old systems coming back to PDR for servicing with bearings responding
well to light cleaning (with dry cloth) to remove any flux residues or dirt.
Rust - We have always used aluminium plate, stainless steel bearings, screws and shafts so there should not
ever be any rust problems.
Squareness - we set the pick-up, in its locked position, to be over the centre of the backheater. With a flat plate,
or PCB in the jaws, we then check the pick-up nozzle makes square contact with the surface. Pick up a flat ‘set
piece’ and lower to the surface to check it touches down evenly - north, south, east, west.
With the pick-up now set and touching the surface, we now adjust the IR lens assembly to aim an IR spot at the
same target. This ensures the IR will aim at the same place as you place a component.
IR Lens/IR Lamp Assembly
Every month do the following:
Check the Lens assembly is not damaged and the IRIS is working properly. Turning the adjuster ring should
adjust the size of the IR spot and the IR spot should be a comfortable red colour.
Change the IR lamp Socket - every 2 months in normal use. The connections become corroded and will affect
the IR output.
Check the IR lamp pins for corrosion - they can be cleaned, or the lamp changed
Clean the IR Filter - with IPA alcohol to remove flux residue
