Speed controller testing

[Orangie]

Originally Posted by biphase

Was the motor running? What issue are you having with the cart?

Yes motor running wheels off the ground. I’m having jerky hesitation with accelerating forward or reverse. Low power, can’t climb blacktop hills or slopes and poor battery life


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[Orangie]

Originally Posted by LPnTX

I would junk that garbage Moric controller even if it was good. Can Don Plowman at Plowman's Carts and discuss controller options with him.

I may do that thanks!


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[biphase]

Originally Posted by Orangie

I may do that thanks!


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It sounds like you have a battery problem NOT a controller problem.

You need to hook up your voltmeter to the battery pack and monitor the voltage UNDER LOAD...preferably while you are driving the cart. If you see a large fluctuation in the 48 volts, try measuring each individual battery one at a time while you are driving. If you find one battery that is substantially worse than the others, replace that battery with a good used one.

[Orangie]

Originally Posted by biphase

It sounds like you have a battery problem NOT a controller problem.

You need to hook up your voltmeter to the battery pack and monitor the voltage UNDER LOAD...preferably while you are driving the cart. If you see a large fluctuation in the 48 volts, try measuring each individual battery one at a time while you are driving. If you find one battery that is substantially worse than the others, replace that battery with a good used one.

48.6 under 1/4 load
50.8 full charge
Individual 8.0 to 8.1 under load
All 8.4 before test


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[biphase]

Originally Posted by Orangie

48.6 under 1/4 load
50.8 full charge
Individual 8.0 to 8.1 under load
All 8.4 before test


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Were you driving the cart while making these measurements? You really need to get the voltage readings while the problem (stuttering) is happening. Also, try measuring the voltage directly across the B+ and "NEG" terminals on the controller. By measuring directly at the controller you will include any effect due to possibly burned contacts inside the solenoid.

[Orangie]

Originally Posted by biphase

Were you driving the cart while making these measurements? You really need to get the voltage readings while the problem (stuttering) is happening. Also, try measuring the voltage directly across the B+ and "NEG" terminals on the controller. By measuring directly at the controller you will include any effect due to possibly burned contacts inside the solenoid.

No but I will be tomorrow and try again. I have no B terminals on my controller [emoji35]


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[Orangie]

Originally Posted by biphase

Were you driving the cart while making these measurements? You really need to get the voltage readings while the problem (stuttering) is happening. Also, try measuring the voltage directly across the B+ and "NEG" terminals on the controller. By measuring directly at the controller you will include any effect due to possibly burned contacts inside the solenoid.

Thanks for your help, I don’t get it y why these things are so hard to dial in. Info is so slim


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[biphase]

Originally Posted by Orangie

Thanks for your help, I don’t get it y why these things are so hard to dial in. Info is so slim


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The "POS" terminal is B+

[Orangie]

So driving the cart load test, full throttle it would bounce around 45 volts, 44 to 46volts
The batteries gave similar readings


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[Orangie]

Originally Posted by Orangie

So driving the cart load test, full throttle it would bounce around 45 volts, 44 to 46volts
The batteries gave similar readings


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Individual battery readings were all similar 8.1 v the drop to 7.1 on initial take off and floats around 7.5 at full throttle and voltage increases when it hesitates


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