In addition to the fans for blowing the model, there are 2 more: cooling the board and blowing the extruder. This chip is turned on by supplying a logical unit to the Isense input, however paradoxical it may sound.
#Cubify firmware driver#
Although, given the capabilities of this microcircuit, the second driver can be used without prejudice for switching the heating table (manufacturers most likely counted on this because the usual logic level field effect transistor can also be used for a fan). One of the microcircuits is connected to the heater of the extruder, and the second controls the fans for blowing the model. This is a single-channel load driver with an output current of up to 16.5A and current feedback. But it passed - the motors were not affected. The temperature was much more than 100 degrees. When trying to check the temperature, the SD almost burned. And already at the end of the press, I felt the smell of burning SD windings that was not characteristic of printers. Printing time was more than half an hour. And I noticed this cant only when I had already calibrated everything, assembled and launched the first long print. Because of this, after the alteration, the current supplied to the motors increased significantly, but during the setup I did not notice this because I did not turn on the motors for a long time. Since the voltage at the REF leg is formed by a resistive divider connected between the supply voltage of the digital part and the ground, when switching to arduino, I did not take into account the moment that the voltage rose from 3.3 to 5 volts, which led to an increase in the voltage at the output of the divider. The output current set by the voltage at the REF pin is also fixed. The microstep mode with 16 cycles per step is selected that is the most accessible for this microcircuit. For each driver comes 3 control signals #ENABLE, STEP and DIR.
#Cubify firmware drivers#
There are 4 identical A3979 drivers installed on the board. In general, I abandoned all this luxury by drinking MK and cutting the power path to SD and WiFi. I could not find the documentation for this display, and disassembling its interface with the data logger was lazy. Also, 6V is converted by a low-power stabilizer to 5V, which is used to power an external USB flash driveĮverything is controlled by a PIC microcontroller, to which peripherals are connected, represented by the SD drivers, WiFi module, flash SD card, external USB ports and a touch graphic LCD.
To power the logical part, this voltage is first reduced to 6V by a linear voltage stabilizer, and then it is fed to a 3.3V stabilizer - this voltage is used to power the MK, the logical part of the stepper motor drivers, WiFi module and built-in microSD memory card.
This voltage is directly used by the power part of the stepper motor drivers, the extruder heating driver and to power the fans. The printer is powered by an external 24V power supply. There are also signatures on the tracks needed to connect the stepper motor drivers to the microcontroller. In the photo there is a board with a native control controller already unsoldered (you can see it on the right side of the board with attached tape so that it does not get lost). In general, without a doubt, I decided to replace the control electronics with a much more interesting one, with the look of the Arduino mega 2560 + Marlin firmware.Īfter disassembling the printer, I saw just such a board: In addition, cartridges still need to be searched. The plastic in it is about 300 grams, but it costs like a few kilograms of ordinary. The second drawback is a branded chip-cartridge with plastic. It turns out a 3D printer for housewives and schoolchildren. In general, it turns out that the printer will almost certainly print what you need, but after several figures are printed, an irresistible desire arises to change something in the settings and it turns out that basically nothing can be changed.
#Cubify firmware software#
The first drawback is that proprietary software does not allow changing print settings at all. A lot of advantages: high-quality assembly, a beautiful case, an acceptable ratio of quality to print speed and dimensions are very suitable for home.īut there are 2 significant disadvantages.