Pricerange: 48.00 EUR

https://shop.germanreprap.com/de/Powerlolu-Schrittmotortreiber-bis-10A

https://shop.germanreprap.com/de/Powerlolu-RAMPS-Verbindungskit

The new Powerlolu board from German RepRap can drive stepper motors up to 500 Watts, drawing currents up to 10 Amps.
 
The existing Pololu boards found in common RepRap 3D printers are at their limits when driving the 2 Nema17 z-axis stepper motors in parallel. Continuous z-axis movement can cause the board to overheat. These boards hardly  drive stepper motors bigger than a Nema17. To avoid overheating or to drive larger motors a more powerful driver board is needed.
 
The Powerlolu board enables the use of  bigger stepper motors for a wide range of uses. This could be the conversion of manual milling machines  into computer controlled milling machines (CNC-Machines) using the affordable electronics such as Arduino and RAMPS. Building 3D printers with a larger print volume or with larger extruders would be possible.
 
To test the design, the GermanRepRap lab connected a Nema43 stepper motor by Nanotec Electronic (capable of 6.6 Amps per coil, Torque  2000Ncm, Weight 8,4kg) to a Powerlolu attached to a 3D printer’s RAMPS X-port.
 
A short video of the new driver can be seen on YouTube at https://www.youtube.com/watch?v=G9FWvhZI7rs . After two hours of motor usage the Powerlolu board only got luke warm.
 
This Youtube video show the powerlolu driving a NEMA34 stepper motor with a simulated load of 2 Nm torque using a Eddy Current Break. Hardley the powerlolu board gets warm only 39° celcius.
 
German RepRap offers the fully assembled Powerlolu board for 39.90 Euros without VAT and 47,48 Euros including German VAT,   You can  place an order in our Online-Shop now.
 
Technical specifications:
Fully Assembled PCB
3-wire control with DIR, STEP, Enable-signal, compatible to the Pololu board
Supply voltage of the stepper motor from 12V to 50V
Adjustable stepping via SMD-jumper, 1, 1/2, 1/4, 1/16 (default) steps
precision pot to adjust the current limiter
no extra heat sink required due to passive cooling
Molex snap-on connector for connecting the RAMPS board to the Powerlolu
Dimensions of the PCB: 75.5mm x 65mm
 
Optionaly available  Powerlolu-RAMPS connection kit.