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Re: (ET) Elec-trak Digest, Vol 14, Issue 109



Yes, but... with the electronic controller, reversing is not "instantly", and is done by changing polarity on the field winding. The controller has a ramp down & ramp up process. While not instant, it is still pretty quick and with a little practice, one learns to hit the reverse switch just enough ahead of the approaching bush or obstacle to change direction just in time without using the brakes (assuming not a steep incline).

On 8/27/16 9:18 PM, Briggs, Michael wrote:

David,

Since the Elec-Trak reverses direction by reversing the direction of the 
current in the primary coils of the motor, wouldn't instantly reversing 
direction while under load cause a significant back EMF spike that could 
fry some electronics? Doesn't the Elec-Trak have a time-delay circuit to 
prevent that from happening (and as the capacitor in the circuit fails 
over time, it allows instant reversing, which leads to frying the reverse 
relay)?

Mike