- dual brushless motor driver electronics
- performs torque control at 10kHz for each motor
- miniaturized version of the Texas Instruments Evaluation Boards
- SPI communication with Master Board at 1kHz
- 6 layer board / FR4 / copper thickness 35μm
- Dimensions: 51mm x 50mm
- Weight: 13g
- input voltage: 5V - 32V (we operate our robots at 24V)
GREEN/BLUE LED (shows system and motor status):
Off = system disabled
On =system enabled
Slow Blinking = motor enabled
Fast Blinking = aligning motor
RED LED: Turn on if there is an error
We have mostly been ordering the Micro Driver boards from BetaLayout. Beta Layout has the permission to replicate our MicroDriver v2 board order for anybody who is interested - they ship worldwide.
Send an email to info.de@beta-layout.com and ask for a quote for replicating the MicroDriver v2 boards according to the order number AU-201909/38760.
They will send you a quote for producing the boards and for the placing and soldering service - NOT including the cost of the electronic components.
After you have placed the order for the boards Beta Layout will search for the components and will send you the component list with the actual component prices for your approval. For our last orders the component price was around 50€ per board.
We order the boards with all the components placed and soldered - except for the precision resistors and the Hirose connectors. The soldering of those components is described below.
In the US we have also successfully ordered the Micro Driver Boards from MacroFab.
| Description | Details | Ordering Information | Comments |
|---|---|---|---|
| MicroDriver v2 | BetaLayout USA: MacroFab |
Ordering Instructions | |
| Precision Resistors 7mΩ ±1% | CRE2512-FZ-R007E-3 | RS 824-0348 Mouser 652-CRE2512FZR007E-3 |
Phase Current Measurement Micro Driver Board |
| Right Angle Pin Header | Pitch 2.54mm | RS 360-6364 | Motor Phase and Power Connection Micro Driver Board |
| Hirose DF13 Right Angle Header 5 Pin | DF13-5P-1.25DS(20) | Digi-Key H2202-ND | Encoder and SPI connector Micro Driver Board. We use the right angle connectors. Alternatively you can use the straight connectors. |
| Description | Details | Ordering Information | Comments |
|---|---|---|---|
| JTAG EMULATOR XDS100V2 USB | Spectrum Digital XDS100V2 JTAG | Digi Key 702302-ND Farnell 1831927 |
|
| Pin Header 8 Position 1.27mm pitch | Amphenol ICC 20021111-00008T4LF | Digi-Key 609-3711-ND | Flash Cable Connector Micro Driver Side |
| Pin Header 2,54 mm pitch | Assmann AWL254-DG-G72A | RS 674-2347 | Flash Cable Connector Emulator Side |
| Ribbon Cable | HARTING 09180107001 | DigiKey 1195-4452-ND | Pitch 1,27mm / 0,050" |
The MicroDrivers come without any connectors (for power wires, encoders, spi and motor wires). These have to been added. In addition, six resistors have to been soldered on the back of the MicroDriver.
For the encoder connectors, it's possible to use either Hirose DF13 Straight Pin Headers or the Hirose DF13 Right Angle Pin Headers
The six precision resistors needs to be soldered on the back of the MicroDriver.
Trick: Use some solder at the tip to initially fix the resistor a bit. Then solder the other side and fix the initial side in the end properly.
Micro Driver Stack with right angle Hirose connectors.
We recommend to use the right angle Hirose connectors for the encoders and the SPI communication if the cards are mounted in a stack. This allows for connecting and disconnecting the encoder and SPI wires without disassembling the stack.
The right angle Hirose connectors are mounted to the bottom side of the micro driver boards as shown in the picture below. The straight Hirose connectors are mounted on the top side of the micro driver boards. That way the pin assignment is identical and both connector options are compatible with the Actuator Module Wiring Interface.
Micro Driver Boards with Hirose encoder connectors.
Left side: right angle connectors / Right side: straight connectors
Micro Driver Boards with Hirose connector for SPI communication.
Left side: right angle connectors / Right side: straight connectors
Use a vise to clamp the board and locate the Hirose connector.
Solder the two encoder connectors and the spi connector onto the board.
Solder a two pin right angle connector to the power terminals.
Shorten the pins, solder the extension wires and apply heat shrink.
Right angle pin and mating connector.
Use a mating connector to hold the pin during soldering.
Orient the pin as desired, apply solder and shorten the pins.
Repeat for all six motor phase connections.
Apply the extension wires and heat shrink.
Attach the 2mm motor phase connectors and label the wires.
On one of the boards we attach a 2 pin Hirose wire to power the Master Board.
The MicroDriver boards are flashed using a JTAG emulator connected via USB.
The emulator is connected to the MicroDriver using the connector cable described below.
Note: A long wire might cause communication problems when attempting to flash the MicroDriver. A cable length of 10 cm worked well for us.
| Connector Emulator | Connector MicroDriver |
|---|---|
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- Jonathan Fiene
- Julian Viereck
- Felix Grimminger
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