Difference between revisions of "RUMBA Plus"

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== Features ==
== Features ==
== Changes from original RUMBA ==
== Changes from original RUMBA ==
=== Input Voltage Compatibility ===
While the original RUMBA board claims compatibility with power supplies ranging from 12-35V, it uses PTC resettable fuses that are rated for 16V maximum. This means that the board requires modification to be used at voltages above this - though some manufacturers or suppliers may have modified the fuses or shipped boards without them to suit higher voltages.
The RUMBA+ upgrade replaces the PTC fuses with replaceable automotive blade fuses, which are suitable for operating at up to 35V.
=== Improved MOSFETs ===
While the MOSFETs used to drive outputs in the original RUMBA design were sufficient and usually up to the tasks required of them, they did not perform as well as is desirable under heavy loads. This is because they are not true logic-level MOSFETs, and do not switch 'fully' on when being driven by the 5V microcontroller - i.e. they operate in the linear region, not reaching saturation mode. This results in inefficient operation and significant self-heating.
The MOSFETs have been replaced with newer MOSFETs that are logic-level compatible, and that will switch on at a much lower voltage. Additionally, these new MOSFETs also have a much lower on-state resistance, and so will be more efficient and generate less heat while in use.
Further, flyback diodes have been added in order to protect the MOSFETs from back-EMF during switching loads with an inductive component (such as PCB heated beds).
=== LCD Smart Display Wiring ===
Labelling on expansion ports 1 and 2 has been updated to match the labelling common to most compatible LCD displays, as it was previously reversed from the norm.
=== Additional I2C Headers ===
In order to be able to host the new Aus3D Magnetic Encoder modules, four I2C headers have been added to the board. This allows easy connection of up to four encoder modules, and removes the need for an external splitter cable or adaptor board.
== Wiring ==
== Wiring ==
== Troubleshooting ==
== Troubleshooting ==

Revision as of 12:19, 9 July 2016

Introduction

RUMBA+ is an updated version of the RUMBA 3D Printer control board, originally developed by RepRapDiscount.

The RUMBA+ update is designed to address several shortcomings with the original design, and improve on the otherwise solid framework it presents. More information on RUMBA is available on the RepRapWiki page here.

In keeping with the original RUMBA design, RUMBA+ is fully open source.

Features

Changes from original RUMBA

Input Voltage Compatibility

While the original RUMBA board claims compatibility with power supplies ranging from 12-35V, it uses PTC resettable fuses that are rated for 16V maximum. This means that the board requires modification to be used at voltages above this - though some manufacturers or suppliers may have modified the fuses or shipped boards without them to suit higher voltages.

The RUMBA+ upgrade replaces the PTC fuses with replaceable automotive blade fuses, which are suitable for operating at up to 35V.

Improved MOSFETs

While the MOSFETs used to drive outputs in the original RUMBA design were sufficient and usually up to the tasks required of them, they did not perform as well as is desirable under heavy loads. This is because they are not true logic-level MOSFETs, and do not switch 'fully' on when being driven by the 5V microcontroller - i.e. they operate in the linear region, not reaching saturation mode. This results in inefficient operation and significant self-heating.

The MOSFETs have been replaced with newer MOSFETs that are logic-level compatible, and that will switch on at a much lower voltage. Additionally, these new MOSFETs also have a much lower on-state resistance, and so will be more efficient and generate less heat while in use.

Further, flyback diodes have been added in order to protect the MOSFETs from back-EMF during switching loads with an inductive component (such as PCB heated beds).

LCD Smart Display Wiring

Labelling on expansion ports 1 and 2 has been updated to match the labelling common to most compatible LCD displays, as it was previously reversed from the norm.

Additional I2C Headers

In order to be able to host the new Aus3D Magnetic Encoder modules, four I2C headers have been added to the board. This allows easy connection of up to four encoder modules, and removes the need for an external splitter cable or adaptor board.

Wiring

Troubleshooting

Source Files

Purchase

Resources