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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
http://www.homeroasters.org/php/forum/viewthread.php?thread_id=2651&rowstart=80 1/11
#81
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Lylabrown Postedon02/19/201314:36
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ThanksforyourhelpAllen.I'vemanagedtoinstallventports&slidersintheheaterbox.Theportsare1"roundholeslinedwithmetalpipe.There'stwooneachsidebeneaththecoils.Here'saphotoofthesliderknob:
There'soneoneachside.It'sintheopenposition.Toclose,it'sslidinwardtilltheknobisflushwiththehousing.
WiththatdoneIrananothertestofthetemperatureramp.Here'sthechart:
Thelightlinesareapreviousrampwithnointakeports.Thedarkonesare
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JackH08/05/201513:49
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DoubleBarrelBlendingRoaster
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
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#82
#83
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withthenewportsleftwideopen.Asyoucansee,theBT+ETaremuchclosertogether.AndtheRoRisimprovedaswell.Thecurveisalittlejagglyduetorunningabatterychargeronthesamecircuit.
Withthatdone,I'lldoafewroaststogetafeelforit.Thenreportbackwithamorecomprehensivepostofthecontrolmethod.Avideomightbebettertoshowhowitworksonthefly.
Russ
allenb Postedon02/19/201320:50
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Posts:2413Joined:02/23/201019:51
Lookinggood,youdon'twasteanytimefabricating!Ithinkyou'llfindyou'llhavealotmorecontroloftheroasterwiththisfeatureaswellaseliminatingthecoldairdrawinatthemouth.
Anotherusefuloutcomeofthedamperistheabilitytokeepitclosedduringthefirst1to2minutestoallowahighmoistureenvironmentwhileinthemid200'sFwhich,asRingonoted,canhaveapositiveaffectontheroast.
Allen
1/2lband1lbdrum,SiemensSiroccofluidbed,presspot,chemex,cajunbigginbrewerfromthebackwoodsofLouisiana
Lylabrown Postedon02/25/201314:57
1/4Pounder
Posts:140Joined:02/15/201222:00
YourthoughtsarespotonAllen.Thedampersaddanotherusefulcontrolvariable.Thebestpartistheabilitytoslowtheroastoncetheheateroutputislowered.Withnodampersthe"E"temperaturefellslowlywhentheheaterwasoff.Nowitdropsoffimmediately.Whichisveryusefulwhentryingtoslowtheroast@firstcrack.CouplethatwiththeimprovedRoRwiththeinletsopen,andwehaveamuchmoreresponsiveroaster.
Here'salogoftworoasts,thedarklinesareaNicaragua&thelightonesareBurundi's:
Thesameactiontablewasusedforbothroasts.TheBurundi'saresmallandhardbeans&theNiacaragua'sarelargesoftbeans.Iwantedtosee
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
http://www.homeroasters.org/php/forum/viewthread.php?thread_id=2651&rowstart=80 3/11
#84
#85
NewestMember:nckenkBotSlapPanelLastcheck:
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howtheroasterhandlestwodrasticallydifferentbeansusingthesamesettings.
Disregardthe"FCend"onthedarklines.Iforgottopressthebuttonattherighttime(12min).
Thepreheattemperatureis350*,whichafterdroppingthebeansin,theybottomoutattheidealdryingtemperature.OncethebeansareloadedRoastloggerdetectsthetemperaturedropandbeginslogging+activatestheactiontable.
Thefirststepistoapply100%heatertillthebeansreachdryingtemperature(260*).Then50%heatisappliedtoallowforaverysmallRoR.Once275*isreachedRoastloggeradvancestothenextstep.Inthiscase100%heaterisapplieduntilfirstcrack.
Whenfirstcrackbegins.Thebuttonunderthegraphispressed,thegraphismarked&theactiontableadvancestothe"ActionsafterFC"tab.Where25%heaterafter30secondsisentered.Whichseemstogiveanice&slowRoRleadingintosecondcrackaround5minafter1stbegan.TohelppushthebeansintosecondcrackIhaveasettingontheactiontabletooutput40%heateronce415*isreached.Idumpthebeansoncethesnapsofsecondbecomeconsistent(FullCity).Oncethebeansaredumped,the"End"buttonispressed&theloggingstops.
Prettydangneat!
There'splentyofroomforrefinementsofthecurve,etc.Fornow,I'mreallypleasedathowwelltheTC4CandRoastloggercombinationworktogether.The"actiontables"approachdoesofferahighdegreeofcontrolovermyroaster.It'llbefuntocustomizeprofilesforspecificbeansthenmakefineadjustmentsdependingonhowtheycupped.
Russ
allenb Postedon02/25/201316:57
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Posts:2413Joined:02/23/201019:51
Greattohearthedampercontrolprovidesadditional/bettercontrol!It'sneatwhentweaksworkoutwithouthavingtoreinventseveraltimes.
Roastloggerseemstohavealotofpotential.Pleasekeeppostingmoreonitasyoulogmoremileswithitsootherscanknowifitwouldhaveapplicationforthem.
Allen
1/2lband1lbdrum,SiemensSiroccofluidbed,presspot,chemex,cajunbigginbrewerfromthebackwoodsofLouisiana
Lylabrown Postedon03/17/201313:02
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
http://www.homeroasters.org/php/forum/viewthread.php?thread_id=2651&rowstart=80 4/11
#86
#87
1/4Pounder
Posts:140Joined:02/15/201222:00
AmonthagoIuppedthewattageoftheheatingcoilto1750.SincethenI'[email protected]:http://www.amazon...+buss+fuse
Sadly,oneofthemburnedoutduringaroasttheotherday.Whichhappenedbeforefirstcrack.Atotalloss.
Icheckedallthewireconnectionsforshortsandsuchthey'reallfine.Inoticedtheplasticfuseholderhasmeltedonthepowerinsideofit.Mostlikelyfromwhenthefusegothotwhileburningout.
Mykillawattshowstheroasterpulling1765watts/14.7ampswhilerunningonadedicated20ampcircuit.
Doyourecommenduppingthefuseampratingto30?Or,isthereabetterfusetypetouse?Perhapsaresettablethermofuse.
Russ
Dan Postedon03/17/201313:18
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Posts:2030Joined:10/24/200517:09
Asloblo20Afuseisampleprotectionforasystemdrawing15A.Isuspectyouhavesomesortofenergydraw,notashort,goingonthatispullingrightat20A.ThereasonIsaythatisbecauseyourfuseholdergothot.Ifitwasashortthefusewouldhaveblowninstantly,meaningnoheatbuildup.Butfirst,checktomakesureyourfuseholderisratedfor20Aorhigher.Andcheckthatallthewiringgoingfromthereceptacletotheheateriscapableofhandling20A.I'mguessingthatitshouldallbe14ga.Oh,andregardless,replacethatfuseholder!
1poundelectricsampleroaster,3pounddirectflameroaster,bothhandmademodifiedMazzerMinigrinder,LaSpazialeVivaldiIIautomaticespressomachine.WhentheelectricitygoesoutImakevacpotcoffeefrombeansgroundonmyZassenhaushandgrinder,andheatthewaterwithateakettleonthegasrange.
allenb Postedon03/17/201314:01
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Posts:2413Joined:02/23/201019:51
+1onDan'scomments.
IwouldalsosuggestisolatingyourheatingelementcircuitandgetaresistancereadingdownstreamofyourSSRtomakesureyou'vereallygot1750wattsworthofnichrome.I'malsogoingtoassumeyourdrivemotorsarenotpullingmorethanacoupleofampsmax.
Doyouhaveaccesstoanammetersoyoucanverifyyourkilowattmeter'sreadings?
Allen
1/2lband1lbdrum,SiemensSiroccofluidbed,presspot,chemex,cajunbigginbrewerfromthebackwoodsofLouisiana
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
http://www.homeroasters.org/php/forum/viewthread.php?thread_id=2651&rowstart=80 5/11
#88
#89
Lylabrown Postedon03/17/201316:46
1/4Pounder
Posts:140Joined:02/15/201222:00
HeyAllen&Dan,Thanksforyourhelptroubleshootingthisone.I'mreallybaffled.
FYI.Thewiringis10gafromthewallsocketallthewaytotheheaterterminals.Alltheelectricalconnectionsandswitchesinbetweenarerated20a@120/240v.Thebussfuseholderisrated20a@300vaswell.Itwasoverbuiltsothefusewouldbethebottleneckintheelectricalpathway.
Idon'thaveanammeter,justamultimeter.Todoublecheckthekillawatt'saccuracyItrieditona1000wwaterkettle&1200wspaceheaterbothtestedwithin50wofthestatedwattage.
WhileoutatthehardwarestoretogetmorefusesIchattedwiththeresidentelectrician.Hesuspectsthe"microwavetype"busfusescan'thandleasustainedloadof3/4oftheirrating,andconsequentlyoverheat.
Also,thefusesarefastblonotsloblo,Ilinkedthewrongonesintheearlierpost.Doesthatmakeadifference?
I'llkeepdigging.Anyfurtheradvice?
Russ
Lylabrown Postedon03/18/201310:15
1/4Pounder
Posts:140Joined:02/15/201222:00
Foundit.Thesupplywiresthatfeedintotheceramicterminalblockforthenichromecoilshowsignsofoverheating.Ibelievethe10gateflon/fiberglasssheathedwireisratedfor480degreesf.Also,thecopperstrandsarecoatedwithzinc,notnickel.Thezinccoatinghasburnedoffafull2"fromtheconnectionpoint.Thatmeansthewirewasexposedtoover700*f.Deratingitscurrentcapacitytolessthan50%.Uppingtheresistance&erageblowingthefuse.
Here'sapictureofnewvsburntwire.
I'mguessingthatbyrecentlyshorteningthelenghtofthenichrometo
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
http://www.homeroasters.org/php/forum/viewthread.php?thread_id=2651&rowstart=80 6/11
#90
#91
#92
increasethewattageitalsocausedthetemperatureattheconnectionpointtoincrease.Ididnoticethenichromeglowingyelloworangeinsteadoforange.Becoming"thestrawthatbrokethecamelsback".
Ithinkthiswirewillbebetter:http://www.omega..../HTMG.htmlWoulditbewisetoget8gainsteadof10?
Russ
allenb Postedon03/18/201313:40
SuperAdmin
Posts:2413Joined:02/23/201019:51
Russ,
Onemethodsometimesusedinindustrialovensistouseceramicisolatorbushingsthatincludeamachinescrewthroughit.It'ssometimescalledahightemperatureceramicbulkheadbushingandismeanttokeeptheinsulatedwireontheoutsideandontheinsidehookyournichromedirectlytothemachinescrewvianut/washer.Onehalfofthebushinggoesontheinsideandtheotherontheoutside.Thiseliminateshavingtousewirewithaninsulationcapableofnuclearfurnacetempsontheinsideofyourheatbox.It'snoteasytofindbutifyoucalloneoftheappliancerepairpartshousesthey'llusuallyhavethemforsendingwithdryerrestringkits.
Allen
1/2lband1lbdrum,SiemensSiroccofluidbed,presspot,chemex,cajunbigginbrewerfromthebackwoodsofLouisiana
Lylabrown Postedon03/18/201314:12
1/4Pounder
Posts:140Joined:02/15/201222:00
ThanksabunchAllen.Theterminalsinthisimagefityourdescription:
Isthatwhatyouhaveinmind?
allenb Postedon03/18/201314:21That'stheone.Iusedthoseonmyeasydrum1lbrandworkgreat!
Letmeknowifyoufindasourcewhereyoucanbuyjustthebushings
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
http://www.homeroasters.org/php/forum/viewthread.php?thread_id=2651&rowstart=80 7/11
#93
#94
#95
SuperAdmin
Posts:2413Joined:02/23/201019:51
withoutnichromeattached.
Allen
1/2lband1lbdrum,SiemensSiroccofluidbed,presspot,chemex,cajunbigginbrewerfromthebackwoodsofLouisiana
Lylabrown Postedon03/18/201314:51
1/4Pounder
Posts:140Joined:02/15/201222:00
Here'sone:
http://www.partsd...QgodwUMAlQ
Thepriceisabitsteep.Cheaperthannucleargradewirethough.
Russ
allenb Postedon03/18/201315:08
SuperAdmin
Posts:2413Joined:02/23/201019:51
Goodfind!You'rerightaboutbeingsteep!IhadsomeonhandfromwhenasuppliersentmesomerestringkitsyearsagobutIhadnoideatheywerethatpricey.
Maybeoneslocalappliancerepairshopmighthavesomecollectingdustandwouldbewillingtopartwiththemforsomecoffeeoracoupleofbucks.
Thanksforfindingasource.
Allen
1/2lband1lbdrum,SiemensSiroccofluidbed,presspot,chemex,cajunbigginbrewerfromthebackwoodsofLouisiana
Lylabrown Postedon03/21/201313:22
1/4Pounder
Backinbusiness!
Thefolksatthelocalappliancerepairshopsoldmetheterminalsforacouplebucks.Theinstallwassimple,althoughIdidmakeanewheaterboxlineroutofaluminum.Ialsomadeasupportforthecoilsoutofknob&tubefittings,andaddeda20ampresettablefuse.
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
http://www.homeroasters.org/php/forum/viewthread.php?thread_id=2651&rowstart=80 8/11
#96
#97
Posts:140Joined:02/15/201222:00
Ididatestrunningtheheatat100%forhalfanhour.Theleadwiresstayedniceandcoolwithnodiscoloration,andmoreimportantlynoblownfuses.
ThanksforyoursuggestionabouttheterminalsAllen.Yousavedtheday!
Russ
allenb Postedon03/21/201316:14
SuperAdmin
Posts:2413Joined:02/23/201019:51
Wow,arethosecoilsreallythatbrightoronlyinthephoto?
Greattoheartheterminalpostsworkedoutandthatyouwereabletofindthemforagoodprice!Also,nicetouchwiththemidpointceramicssupport.Ihopewecontinuetohaveappliancerepairshopsaround.
Allen
1/2lband1lbdrum,SiemensSiroccofluidbed,presspot,chemex,cajunbigginbrewerfromthebackwoodsofLouisiana
rustic_roaster Postedon07/03/201319:20Lylabrownwrote:
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
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#98
1/4Pounder
Posts:109Joined:03/30/201309:15
Nextonthetodolististhethermocoupleprobes.OriginallyIwantedtoinstalloneinasimilarlocationtoDan'sinthephotoabove.Thatlocationisgreatifthedrumsareallskinnedthesame.Inmycasethelargedrumisskinnedinstainlessmesh,andthesmallarenearlysolid.Foragiven"E"tempIthinkthetemperaturethebeansexperiencewillbesignificantlydifferentwhenusingtheonedrumvstheother.Sotwodifferentlocationsfortemperaturereadingsareneeded.Thelargedrumcanhaveathermoprobeinthe3or9oclockpositionandset1/2"awayfromit.Thesmallonesshouldhaveaprobeinsidethedrumnearthetop.
Here'sthebent1/4"ODaluminiumthermoprobeforthesmalldrum:
Excellentjobonyourroaster.Ihaveacouplequestionsaboutthethermalcoupletube.Itlookslikethetuberunsfromthebacktothefrontthenintothechamberisthatright?Isitheldinplacebyfrictionoritsecuressomehow?
tiopaeng Postedon07/04/201302:56Mycomplimentstoyourcraftsmanship!Verynicelydone.
Tiopaeng
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06/08/2015 Homeroasters.orgDiscussionForum:DoubleBarrelBlendingRoaster
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#99
#100
1/4Pounder
Posts:50Joined:06/19/201301:17
Lylabrown Postedon07/05/201310:32
1/4Pounder
Posts:140Joined:02/15/201222:00
Thanksrustic_roaster,Correct,thetubehousingthethermocouplewirerunsthroughboththeback&frontplatesthenintothedrumopening.It'sheldinplacewithashaftcollar(thekindwithalittlehexsetscrew)onthebackplate.There'salittlewiggleinthetube,butit'sfineformeasuringtheenvironmentaltemperaturewithinthedrum(nobeancontact).
HeyAllen,Wow,arethosecoilsreallythatbrightoronlyinthephoto?Thecameramadethecoilslookyellowhot.Inrealitythey'reaniceredorangecolor.
Ihopewecontinuetohaveappliancerepairshopsaround.Metoo.
Russ
rustic_roaster Postedon07/05/201313:06
1/4Pounder
Posts:109Joined:03/30/201309:15
Lylabrownwrote:
Thanksrustic_roaster,Correct,thetubehousingthethermocouplewirerunsthroughboththeback&frontplatesthenintothedrumopening.It'sheldinplacewithashaftcollar(thekindwithalittlehexsetscrew)onthebackplate.There'salittlewiggleinthetube,butit'sfineformeasuringtheenvironmentaltemperaturewithinthedrum(nobeancontact).
Russ
ThanksRuss.IseeyouhaveplotsshowingBTandEThowdoyougetBTanddoyouthinktheshaftcollarswouldholdwellenoughtousethatapproachtogettheBT?
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