Neato XV Lidar problem

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Re: Neato XV Lidar problem

Postby humanoid » January 29th, 2017, 6:44 pm

Yes, the older (counter clockwise) is 113 and the newer (clockwise) is 64.

Are they all suppose to rotate in the same direction? It is possible that someone before me tries to fix it the wrong way.
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Re: Neato XV Lidar problem

Postby glnc222 » January 29th, 2017, 7:54 pm

No one cares because you try it one way and then the other way as needed. There is a certain amount of trial and error involved with unknown systems and electronics work, with alternative parts. i suppose you could first observe how the original spins, and then test with a 9v battery how the replacement motor spins, to know how to wire it. Some trick is needed to even see how the original spins.
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Re: Neato XV Lidar problem

Postby glnc222 » January 29th, 2017, 8:00 pm

As it runs on 5v maybe a 5v A/C adapter charger can be better, but I saw mention of using 9v batteries. Cut the connector off the end of a USB cable to use USB chargers, etc. Radio Shack has some barrel connectors which match some adapters, or splice some wires into the line on an adapter for additional connections (preserving the existing connector).
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Re: Neato XV Lidar problem

Postby humanoid » January 29th, 2017, 9:33 pm

Do you think there is any point trying to reverse the direction of the motor I have? It still spins inconsistently with RPM going up and down.
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Re: Neato XV Lidar problem

Postby vic7767 » January 29th, 2017, 10:58 pm

The power connector from the Lidar motor is a two pin connector that is keyed to only insert one way. However, with a small amount of extra effort you can reverse the connector and force the power plug into the circuit board jack to perform your test. The firmware within the Lidar control circuit sends a RPM speed reading data word within each of the 360 degree readings as the Lidar spins. Those speed data words are used to send info to the PWM controller that then adjusts the Lidar motor speed. Your XV Lidar may be suffering from either a defective motor or PWM circuit failure. Normally when a motor fails it stops spinning the Lidar turret completely.
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Re: Neato XV Lidar problem

Postby glnc222 » January 30th, 2017, 1:07 am

If the PWM feedback is based on the optical spin sensor in the drum then misalignment of that sensor might affect the result. One user fixed that alignment for a lidar problem. Open the drum to examine it. The sensor is used to determine by timing the direction of the beam.
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Re: Neato XV Lidar problem

Postby humanoid » January 30th, 2017, 8:14 am

Switched the wires on the motor and now everything works. Motor speed is 5. It is possible that because of the reverse direction the speed control was not working properly.

Thanks for everyone for all the help.
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Re: Neato XV Lidar problem

Postby vic7767 » January 30th, 2017, 10:21 am

humanoid wrote:It is possible that because of the reverse direction the speed control was not working properly.
Yes.
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