102991007 Datasheet 102991007 | P4-P6

Steppers

Bipolar and hybrid stepper motors are supported with these stepper motor drivers (SMD). So me  smaller

steppermotorsareknowntoproduceahighpitchnoiseandgetverywarmevenwithalowcurrentsetting.

Theywillappeartowork,buttheymayverywellburndotothelargeheatbeingproduced.

Withtheboardorientedasintheaboveimage,thewiresforthesteppersare:

RevB2:1,2,3,4=OB1,OA1,OA2,OB2<‐Notsostandard

RevB3:1,2,3,4=OA2,OA1,OB1,OB2<‐Prettystandard

Noise

TheTMC2100stepper driversaredesignedtobeveryquiet. However, if thecoil resistance on the steppers

aretoohigh,thecurrentlimitonthestepperdriversareneverreached,andthismakesthesteppersgiveoff

a very high  pitch sound. If you are experiencing high pitch noise, you might want to experiment with

the"stealth mode"which will silence all steppers. This is micro stepping level 7 and 8. Stealth mode might

make the steppers somewhat less powerful, but should work for most printers. To calculate if the current

limitisreached or not,youcancalculatethemaximumcoil resistance for agiveninputvoltage.Ifthe input

voltageis12Vandyouwanttorunyourstepperson1Acurrentlimit,themaximumcoilresistancecanbe12

ohm.

Heaters

TheheateroutputontheReplicapehaveruggedconnectors,withtheheatbedhavingdoubleconnectorsfor

redundancy (in case one wire comes loose) and for handling the power load. These are brand Molex

connectorsthathavebothscrewterminalsforeasyfittingandslotinconnectorsforeasydisassembly.Allthe

heatersarecontrolledwithPWM.ThepowerMOSFETscontrollingtheoutputareAON6758thatareratedat

30V,32A.Fora12VPSU,thismeansthatthemaximumpowerthatcanbeusedontheheatedbedis32Ax

12V= 384 W. Pleaserememberthatthereisa20Afusepreventing such a largepoweruseontheheated 

bed.The20AfuseisinstalledtokeepthetracesonthePCBfromoverheating.

Thermistors

ThethermistorinputsonReplicapehavebeendesignedfor100KNTCthermistors.Thesearethetypicaltype

usedfordesktop3D‐printers.10Kthermistorscan alsobeused,howeverthevoltagedividersetupmakesthe

100Kthermistorsmoreidealsincetheareaofmostchangewillbearound100degrees.TODO:addchartsfor

10Kand100Kthermistorsshowingtheiridealtemperatureformostsignificantbitchange.

Thermocouple

Thermocoupleisnotsupportedoutofthebox,butinsteadrequiressomeextracareinordertowork.Most

importantlyistouseavoltagedivideronthesignalsoitisconvertedtoavaluethattheanaloginputonthe

BeagleBone can handle: 1.8V. Secondly, the input needs to be sent in on AIN0..AIN3, which are pins

P9_37...P9_40.Then,  the analog input used needs to be enabled byadevicetreeoverlay,ideallybyediting

thecurrent  DTO. That canbefoundhere.Finally, thesoftwareneedstobehackedtomakeuse of the new

analoginputandconversion. 

https://en.wikipedia.org/wiki/Voltage_divider

https://github.com/eliasbakken/bb.org‐overlays

Inductive sensors

InductivesensorsaretypicallymountedontheendstopmarkedZ2.IfyouhaveanNPN(sinking)sensor,you

canmountitdirectlyonthere.

Typically

Brown:12V(pin4)

Blue:GND(Pin2)

Black:Sig(Pin1,square)

If you have a PNP (sourcing) type, you need to add a pull‐down resistor externally between the signal and 

ground on the sensor. The value is not important, as long as it can comfortably pull a 4.7K resistor low. 1K

shouldbefine.

DS18B20 temperature sensors

The connector marked Dallas W1 can be used for connecting temperature sensors of the type DS18B20.

Thesearerelativelylowtemperaturesensorsthatcanhandleupto125degreesCelsiusandaretypicallyused

for monitoring the cold end of the extruder which should never reach more than around 60 degrees when

printingwithPLA.Thegreatthingaboutusingacoldendmonitoristhatthetemperaturemeasurementscan

be used to regulate the fan on the extruder. That way, the noise level can be lowered further than when

usingthethermistorasatriggerforenablingtheextruderfan.

Switches as end stops

Alltheend  stops have 4.7K (47KonRevB3)pull‐upresistorsonthesignallines.Therefore,thebestwayto

connect switches is between the signal and ground pins on the connectors. If the switches have can be

connectedasnormallyclosed(NC),thatispreferablesinceitwillactasapressedinswitchifacablehasbeen

destroyedorremoved.

Thesignalsontheendstopsasasfollows:

pin1,square,signal(yellowwireinFritzingdiagramabove)

pin2,round,GND(blackwireinFritzingdiagramabove)

pin3,round,VCC(redwireinFritzingdiagramabove)(5V)Connectors

ReplicapecomeswithMolexscrewterminalsfortheheaters,hotbedandpowerinput.Moststeppermotors

comes with the 4 pin Molex 2.54 mm (0.1") female connector attached. Fans and end stops sometimes

comes with the right connector, but not always, it depends on the manufacturer. The white 2, 3 and 4 pin

connectors on Replicape used for thermistors, end stops and steppers are the MTA‐100 series from TE

connectivity.

P1-P3 P4-P6 P7-P8

102991007

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Buy 102991007

Manufacturer:

Seeed Studio

Description:

Power Management IC Development Tools Replicape Rev B-3D Printer contr. board

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New from this manufacturer.

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102991007