:ANAPURNA XL² | OPERATOR MANUAL |
13. Tips & Tricks.
13.1.Printingonheatsensitivemedia:
Whenprintingonheatsensitivemedia,mediacancome upwards(headstrikes) butalsoexpandsinwidthwhenitisheatedupbypa ssingUVlamps. Thiscannotonlycauseheadstrikes,butduetothee xpansionduringprint,the differentprintpasseswillnotalignproperlywithe arlierprintedpasses.Thiswill mostlybevisibleaslighterzones(spots)attheedge sofyourmedia(inboth directions).
Inthesecasesyouneedtominimizetheamountofheat thatreachesyourmedia, byfollowingguidelines:
PrintUnidirectional.Thisworksondifferentaspects togetherandismost likelythebestsolution:
oTheleftUVlampcanbeturnedoff(50%lessheat)
o | Aftereachpass,themediacancooldownagainduring | thereturnpass |
o | Nobidirectionalprintingmeansalsolesssusceptible | tovisible |
| artefactsduetomediaexpansion. |
|
oPrintQualityimprovement UseonlyhalfpowerontheUVlamps,iftheinkissti llenoughcured.
Makesurethecarriagemovesovertheleftmediaedge ,onpointofreturn(use awhitetrailerinWasatchattherightsideofyour image).
forrigidmedia:putarigidofthesameheightinfr ontandbehindthemedia; Thatwayyouavoidthatopenairholesatthestartand theendoftheplate willmakethevacuumlowerandallowthemediatomove duringexpansionby heat.
Ifthisisnotsufficientornotwanted,followingacti onscanbedone:
Ripandprintyourimageinalowernumberofpasses; Thiswillreducethe numberoftimesthatalamppassesthemedia.
Selectahighershuttlespeed;Itwillnotalwaysbe possible,andinfluences certainlytheprintquality.
Setaheadheightof2to2.5mm.(AdjusttheBidir alignmentifprinted bidirectional);Printqualitywillgetlower.
Forsmallermedia:placethemediaatthe2ndregis terpins(leftside),so you’llallowthesurfacetocooldownmoreinbetweenthe longerprintpass.
Onverysmallmedia:masktheconveyorbeltareaaroun dthemedia,ensuring astrongerlocalvacuum.(Usesheetsofpaper).
Usealeadingwhiteborderof15cminWasatchinfr ontoftherealimage data.Thiswilltakeyouafewextraprintingpasses butthiswilltakecarethat theborderofyourmediaisalreadyheatedupsteadily permovingpassand conditioned(extended)againstthetimethatthefirs tdropsarejettedontoit.
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