RAMPSXB

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Revision as of 03:18, 30 August 2017 by Jobo (talk | contribs) (through hole board)
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RAMPSXB

Release status: Working

RAMPSXB.jpg
Description
RAMPS eXpansion Board
License
Author
Contributors
Based-on
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CAD Models
External Link


Summary

RAMPSXB (RAMPS eXpansion Board) is a shield that attaches to the AUX pins of the common 3D printer control board, RAMPS.

It adds 4 additional stepper motor driver carriers, 4 additional thermistors, 4 additional PWM-controlled MOSFETs, EXP1 and EXP2 for an LCD controller (such as the RepRapDiscount Smart Controller), additional VCC pins, 5V pins, regulated TX/RX for an HC-05 chip, and suppression capacitors on the minimum endstops, similar to the RAMPS 1.4.2.

This allows for a variety of combinations, including 6 completely separate extruders, or a mixing extruder and a few fans, or a mixture of voltages (12V on the main RAMPS, and 24V on the RAMPSXB). It was originally designed to run either the E3D Kraken or Diamond Hotend, with some spare heaters for fans, lights or support extruders.

RAMPSXB consumes the maximum endstops, as well as servo pins 2, 3, and 4 to drive the FETs.


Layout

RAMPSXB Board Layout, as of V2.1

Schematic

RAMPSXB Schematic as of V2.1

Open Source Files

EAGLE files can be found here: https://github.com/SZiv/RAMPSXB


Where to get it?

No manufacturers for this yet. ¯\_(ツ)_/¯ Nothing is too hard to solder, so if you can get ahold of the board, its not very hard to assemble.


Through hole board, a fork

Must also comment on choice of mosfets available when making Sinaptec, RAMPS and RAMPSXB. Basically this is a 2.5 layer or 3 layer board, i want it all to be through hole, as I am sick of buying new (hard to source) SMD components. This will be a fork. Spacewise how would the board look, is adequate spacing available for through hole components? 1/4W resistor, 3mm LED, through hole mosfet...

Pin Definitions

E2 Direction - 15
E2 Step - 19
E2 Enable - 63
E3 Direction - 2
E3 Step - 39
E3 Enable - 58
E4 Direction - 42
E4 Step - 44
E4 Enable - 43
E5 Direction - 32
E5 Step - 47
E5 Enable - 57
Thermistor T3 - A11
Thermistor T4 - A12
Thermistor T5 - A10
Thermistor T6 - A5
MOSFET H3 - 4
MOSFET H4 - 5
MOSFET H5 - 6
MOSFET H6 - 45

Bill of Materials

Location Description Quantity Package Notes
C1,C2,C3,C4 Electrolytic Capacitors, 100uF, SMD 4 0605 For Stepper Carriers
C5,C6,C7,C8 Electrolytic Capacitors, 10uF, SMD 4 0405 For Thermistors
C9,C10,C11 Nonpolarized Capacitor, 0.47uF, SMD 3 0805 Suppression Caps for Endstops
R5,R6,R7,R8,R19,R20,R21,R22 Resistors, SMD, 100k Ohm 8 0805 For FETS and Pulldowns
R1,R2,R3,R4 Resistors, SMD, 10k Ohm 4 0805 Pullup Resistors
R15,R16,R17,R18 Resistors, SMD, 10 Ohm 4 0805 For FETs
R11,R12,R13,R14,R27 Resistors, SMD, 1.8k Ohm 5 0805 LED current limiting resistors
R23,R24,R25,R26 Resistors, SMD, 4.7k Ohm 4 0805 For Thermistors
R10 Resistor, SMD, 3.3k Ohm 1 0805 Half of a Voltage divider for the HC-05 Chip. No HC-05? You don't need this!
R9 Resistor, SMD, 2.2k Ohm 1 0805 Other Half of a Voltage divider for the HC-05 Chip. No HC-05? You don't need this!
Q1,Q2,Q3,Q4 MOSFET, Through-hole, stp55nf06l 4 TO-220 Main Power MOSFETs.
N/A TO-220 Heatsinks 4 TO-220 Heatsinks for the FETs. Not required, but dirt cheap and suggested.
LED1,LED2,LED3,LED4,LED5 LEDs, SMD 5 0805 LEDs that tell you if the FETs are on, and one that tells you if main power is on.
N/A Screw Terminals 5 3.5mm Input/output power terminals. If you need more than 4A, solder directly to the bottom traces.
F1 PTC Fuses 1 N/A 30V, 9A if you cover the bottom traces for extra power, 6A if you dont.
N/A Male/Female Pin Headers A lot? ¯\_(ツ)_/¯ 0.1" spacing. Buy a couple of Female double rows, male double rows, male single rows, and female single rows.
N/A PCB 1 N/A The Actual PCB. I get mine from OSHPark, but you can get it from SEEED for better prices.