Electronic boards review
Feature
In those early days you could buy GEN3 with a RepRap or Makerbot build option – the main difference was choice of connector’s and the fact RepRap had gone down the road of using a Stepper driver for the Extruder and Makerbot were still using a DC motor with optical position feedback – GEN3 handled both options. Just.
The Gen6 board by Mendel-Parts was one of the first board sets to be developed as an all in one integrated board with 8x micro-stepper drivers directly soldered onboard, it’s limiting issue was that it had no Heated bed control, but it sold very well and started a trend of many similar and compatible developments.
Most early Sells Mendel machines used GEN3 and so did all the Makerbot Cupcake’s
Sanguinololu and GEN 7 were both developed to continue the RAMPS style of easy to assemble using mostly conventional components and enough functions for most 3D printer users. GEN 7 was particularly suited to hobby assembly; even the PCB being single sided can be made at home and it is still a highly robust and reliable design.
GEN3 only had 2x micro-stepping drivers so everything was noisy and a little clunky, and the extruder boards blew up a lot of the time. GEN3 mainly used a dedicated RepRap Arduino based firmware and a JAVA Host program developed by Adrian Bowyer to control the machine, it had no electrical noise protection and as you had to run from a serial port, often had issues with hanging up or generally going a bit wrong in the middle of a print. Then a little while later after Adrian Bowyer and others experimented with some Pololu stepper drivers, we finally had a reasonable set of Electronics to expand and do some serious firmware development – RAMPS by Johnny Russell - https://ultimachine.com/ramps RAMPS was originally a single sided (1.5 layer with a few wire links) design that required only conventional components to be soldered to a ‘shield’ PCB that fitted onto a standard Arduino MEGA controller. RAMPS was one of the first designs to define a set of pinouts for various functions, this made it very easy to evolve more versions to have more options and capability. To keep a small form-factor some surface mount components are now used and it’s fair to say it’s probably the most used electronics at the moment.
Teensylu is a more integrated version of Sanguinololu using more surface mount components and removing the need for a separate FTDI Serial communication device. (http://reprap.org/wiki/Teensylu) The Melzi and PrintRboard http://reprap.org/wiki/Printrboard are further examples giving somewhat easier to wire fully featured small electronics designed to be produced in volume manufacture at a low cost. (http://reprap.org/wiki/Melzi) In the last few years we have seen a boom in available RepRap electronics. Many are repackaged versions of RAMPS which makes sense as so many of the firmware’s can then use them with only simple modifications to pin out files or software modules. More recently ARM based control boards have started to surface along with dedicated firmware versions to make the most of the increased processing power available. RepRap electronics still have some way to go before becoming a universal standard for 3D printers, but we are at the point of having a choice of many compatible versions and firmwares to run on them with newer improvements happening all the time. REPRAPMAGAZINE
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