File: D:/web/homefly/prodimages/VARBL1 June 2007.htm
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<TITLE>VARBL1 Brushless ESC Micro Planes Solutions</TITLE>
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<P>				<B><U>VARBL1 BRUSHLESS ESC</P>
</B></U><P>Software release 2.2 (June 2007)</P>
<P>VARBL1 is a very light and high performance electronic speed controller for micro brushless motors up to 12g category.</P>
<U><P>Technical data :<BR>
</U>Weight (bare board) : 0.56g. Wiring may double the weight.<BR>
Power supply : 1 Li-poly<BR>
No BEC<BR>
Frequency: 12 kHz<BR>
Maximum current: 2A<BR>
Voltage stability control integrated.<BR>
Maximum current: optional, disabled by default.<BR>
Timing advance optimization.<BR>
Zero throttle test.<BR>
Autocalibration (disabled by default)<BR>
Configuration selector.<BR>
Li-poly low voltage test with motor cut off.<BR>
Soft start.</P>
<U><P>Starting with VARBL1 :</P>
</U><P><IMG SRC="Image11.jpg" WIDTH=243 HEIGHT=256></P>
<P>A,B,C : the 3 motor phases<BR>
Programming pads : don�t solder anything here.</P>
<P><IMG SRC="Image12.gif" WIDTH=287 HEIGHT=222></P>
<P>First turn the transmitter ON. Then connect the VARBL1. If throttle not low, it will not start.</P>
<P>Beeps mean: configuration selected, signal received and ready to start. One beep for config. #1, two beeps for config. #2 and so on. Configuration # may be selected by a micro potentiometer. Use jeweler�s screwdriver.</P>
<P>Starting procedure is ON if propeller is stopped, so you can put the throttle very low for a short time and restart immediately without any delay if propeller is turning.</P>
<P>If the motor starts wrong side, invert 2 phases. </P>
<U><P>Troubleshooting :</P>
<UL>
</U><LI>No beep : check power on, check receiver, lower throttle trim. </LI>
<LI>Stalled at full speed: first stop throttle immediately. May be possible on some motors requiring a high timing advance. Change your configuration. </LI>
<LI>Don�t overload it with too powerful motor. </LI>
<LI>Irregular speed: change your configuration, verify wiring. </LI>
<LI>If motor whistles and propeller stalled, put the throttle low and restart. </LI>
<LI>Irregular running: 90% of problem are wiring (bad soldering or wire about to break near soldering pads)</LI></UL>
<B><U><P>VARBL1 Configuration : </P>
</B></U><P>On 1.2 release or later, a screw micro potentiometer is soldered instead of the DL1 diode.</P>
<P>The screw position allows 5 different configurations. One side of the screw is flat, acting as a pointer. (here it points to config #3) Use jeweler�s screwdriver.</P>
<P><IMG SRC="Image13.gif" WIDTH=444 HEIGHT=369></P>
<B><U><P>Motors compatibility table</B></U> :</P>
<TABLE BORDER CELLSPACING=1 CELLPADDING=4 WIDTH=612>
<TR><TD WIDTH="27%" VALIGN="TOP">
<P>Motor manufacturer ref.</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P>MPS ref.</TD>
<TD WIDTH="13%" VALIGN="TOP">
<P>Config. #</TD>
<TD WIDTH="12%" VALIGN="TOP">
<P>3.5V</TD>
<TD WIDTH="10%" VALIGN="TOP">
<P>7V</TD>
<TD WIDTH="10%" VALIGN="TOP">
<P>10V</TD>
<TD WIDTH="9%" VALIGN="TOP">
<P>ramp</TD>
</TR>
<TR><TD WIDTH="27%" VALIGN="TOP">
<P>Micro BL 1.5g</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P>BL1R_20</TD>
<TD WIDTH="13%" VALIGN="TOP">
<P>2</TD>
<TD WIDTH="12%" VALIGN="TOP">
<P>OK</TD>
<TD WIDTH="10%" VALIGN="TOP">
<P> </TD>
<TD WIDTH="10%" VALIGN="TOP">
<P> </TD>
<TD WIDTH="9%" VALIGN="TOP">
<P>O</TD>
</TR>
<TR><TD WIDTH="27%" VALIGN="TOP">
<P>10/3/26S</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P>BL1_20</TD>
<TD WIDTH="13%" VALIGN="TOP">
<P>1</TD>
<TD WIDTH="12%" VALIGN="TOP">
<P>OK</TD>
<TD WIDTH="10%" VALIGN="TOP">
<P> </TD>
<TD WIDTH="10%" VALIGN="TOP">
<P> </TD>
<TD WIDTH="9%" VALIGN="TOP">
<P>O</TD>
</TR>
<TR><TD WIDTH="27%" VALIGN="TOP">
<P>10/3/26/D</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P>BL1_35</TD>
<TD WIDTH="13%" VALIGN="TOP">
<P>3 or 1</TD>
<TD WIDTH="12%" VALIGN="TOP">
<P>Not tested</TD>
<TD WIDTH="10%" VALIGN="TOP">
<P> </TD>
<TD WIDTH="10%" VALIGN="TOP">
<P> </TD>
<TD WIDTH="9%" VALIGN="TOP">
<P>O</TD>
</TR>
<TR><TD WIDTH="27%" VALIGN="TOP">
<P>13/314T gold</TD>
<TD WIDTH="18%" VALIGN="TOP">
<P>BL1G_50</TD>
<TD WIDTH="13%" VALIGN="TOP">
<P>3</TD>
<TD WIDTH="12%" VALIGN="TOP">
<P>OK</TD>
<TD WIDTH="10%" VALIGN="TOP">
<P> </TD>
<TD WIDTH="10%" VALIGN="TOP">
<P> </TD>
<TD WIDTH="9%" VALIGN="TOP">
<P>O </TD>
</TR>
</TABLE>
<P>Cfg1 PWM 50% timing advance low at starting</P>
<B><U><P>Low voltage cutoff:<BR>
</B></U>R25 resistor enable or disable if removed low voltage test for Li-poly cells<BR>
Critical voltages are: 3.2V for 1 Li-poly, 6V for 2 and 9V for 3.<BR>
Below critical voltage, motor stops. You have to arm the ESC by putting throttle low to restart.</P></BODY>
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