Quote:
Originally Posted by chris 545
Victors for us. Didn't need the hooks because we staple the wires down. The max current is 60 but our max breaker is 40. The limiter for keeping the motors from burning out isn't needed because we limit the arm with programming.
Victors have higer overall output, but Jaguars have a smoother control curve.
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I really need to address a few things (misconceptions) here. The hooks referred to on the Jaguars (for the casual reader) are hold downs for the PWM control wires. (I assume that "stapling" indicates your robot used a wood electrical base. Generally staples are less than desirable as there is 5 volts and power common in the PWM cable and an errant staple could bring down your robot if it should short those two lines.
The max current specifications for the two controllers is based on the specifications of the FETs used and refers to the continuous current. (The Jaguar uses a FET that is slightly better in this regard) In both controllers and on our robots, current in CIM motors can achieve 129 amps in stall. There is nothing that limits that current, including the breakers (assuming wiring is not undersized or lengthy). The breakers will pass nearly 200 amps for short bursts without tripping.
The Jaguar has implementations that make it more linear at lower throttle values (primarily due to it's higher switching frequency) and it has a slightly lower series "ON" resistance due to the FETs used. However, these differences may not be evident in your implementation. (For the price of a search, you will find a long discussion on this subject elsewhere on this forum)
For
both controllers, full throttle means they are supplying the full battery voltage to the motor they are controlling. There is no modulation of the output at full throttle. The Jaguar does contain a small resistor that is used for current sense, it is equivalent to 6 inches of #10 wire. There is a voltage drop across this resistor that can limit the available supply voltage at higher currents and the current sense may cause the Jaguar to interrupt current flow for a short period of time.