From 20.11.2014 in garbage Samodelnye tools Homemade CNC machines
Translated alexlevchenko92 for mozgochiny.ru
The continuation of the article about how to make a homemade 3D printer part 1.
Now everything is ready to test the engines of the printer. Connect the computer to the controller using a USB cable, the motors must be connected to the corresponding pins. Start Repetier Host and enable the communication between the software and the controller selecting the appropriate serial port. If the connection is successful, you will be able to control motors using the manual control.
In order to avoid overheating during continuous use will regulate how much current to apply to which engine. This is an important operation in order to avoid loss of step.
To do this, connect only one motor which corresponds to one axis. The same operation will be carried out for the two remaining engines. For this step we need a multimeter which is connected in series between the power source and the controller. The multimeter needs to be set in the mode of current measurement, see image.
Then connect the controller to the computer by measuring the current with a multimeter. After the engine is activated through the Repetier interface current should increase by a certain value. On the display of the multimeter shows the current that goes into running a stepper motor. You need to determine the current for each motor axis. All the value are different from each other. It is necessary to adjust the potentiometer for the stepper motor and set the constraint value for each axis in accordance with the following reference values
Adjustable on-Board flows a current of approximately 80mA
Assign current to 200mA for X and Y axis stepper motors
400mA for the Z axis because she needs more energy to move a carriage
400mA for the engine of the extruder because it is a different type.
In the following link you will find the necessary templates of the frame that should be cut. Use acrylic plate with a thickness of 5 mm but you can use other materials such as wood depending on the availability in stores and prices. The template file e-wastelaserframe
The frame design allows you to assemble the entire structure without the use of cleia parts are assembled using mechanical joints and screws. Before cutting the parts of the frame make sure that the holes for the motors are located in accordance with the CDDVD parts used for the construction of the printer. Measure and make the necessary changes to holes of the template engines in CAD.
Although the downloaded Marlin firmware has a standard calibration of regulating axes. You have to go through this step if you want