Stuck Wheel Problem and Fix

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Re: Stuck Wheel Problem and Fix

Postby Jubo » November 16th, 2012, 5:19 am

yes it will
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Re: Stuck Wheel Problem and Fix

Postby SyRenity » November 16th, 2012, 5:58 am

Might use USB just to run the wheels conveniently -- if can set fast enough. Manual at website shows SetMotor operates wheels -- set unit upside down, or on blocks


I just tried that, SetMotor is not powerful enough to turn the wheel.
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Re: Stuck Wheel Problem and Fix

Postby SyRenity » November 16th, 2012, 5:59 am

Jubo wrote:yes it will


Thanks.
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Re: Stuck Wheel Problem and Fix

Postby SyRenity » November 16th, 2012, 6:36 am

I actually can't find any spare wheel+motor units on eBay, anyone can point me where it can be purchased?

Thanks.
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Re: Stuck Wheel Problem and Fix

Postby mfortuna » November 16th, 2012, 7:21 am

Just catching up on this thread. Yes roomba 400 motors can be disassembled by unsoldering the brush contacts. Very easy actually.

To clean a brushed motor:

Blow out the motor with compressed air.
Spray inside the motor with electric parts cleaner.
Blow out the motor with compressed air.
Put a drop of oil on each bushing.

I found this:
http://www.ebay.com/itm/NEATO-XV-11-MAI ... 3f1efbfd6c
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Re: Stuck Wheel Problem and Fix

Postby aziesemer2 » November 16th, 2012, 10:00 am

If you have a minimum skill in electronic area, I'd suggest you to try the procedure in the first post, unless you can still use your warranty.
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Re: Stuck Wheel Problem and Fix

Postby vic7767 » November 16th, 2012, 11:32 am

Yes
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Re: Stuck Wheel Problem and Fix

Postby SyRenity » November 18th, 2012, 5:08 am

Wow, seems all yesterday update are lost due to forum crash.

Anyhow, I ran last night the wheel motor 2 hours, 1 hour in each direction, on 9v. It seems to start turning better once the motor is heated, but once it cools down when placed back to bot, it stops working.

Last question on this before I order a replacement motor - is it important if the amperage 350 mA or 1A?

Thanks.
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Re: Stuck Wheel Problem and Fix

Postby mfortuna » November 18th, 2012, 8:51 am

It should match the existing motor. Does the Neato's command interface display motor current? Someone may have already posted it. 1A seems too high.

Try adding a drop of oil to each bushing. It won't hurt.
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Re: Stuck Wheel Problem and Fix

Postby aziesemer2 » November 18th, 2012, 9:05 am

Hmmm, interesting... it seems you should do the burn-in procedure when it's cold...
Ok I'll tell you exactly what I did... I didn't know it would make any difference.

After the wheel got hot, I put it in the refrigerator to cool it faster... :)

Not sure about the amperage... if it can spin at full speed I don't think it'll be a problem.
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Re: Stuck Wheel Problem and Fix

Postby SyRenity » November 18th, 2012, 9:41 am

How much heat the motor should produce, so it be enough to place in fridge?

Running on 9v / 350 mA, it was slightly hot to touch, but not burning.
Last edited by SyRenity on November 18th, 2012, 10:06 am, edited 1 time in total.
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Re: Stuck Wheel Problem and Fix

Postby aziesemer2 » November 18th, 2012, 10:05 am

Same here, but just to be sure it wouldn't "melt", I decided to cool down and restart later.
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Re: Stuck Wheel Problem and Fix

Postby SyRenity » November 18th, 2012, 10:08 am

aziesemer2 wrote:Same here, but just to be sure it wouldn't "melt", I decided to cool down and restart later.


So basically you ran on 9V until it got hot, placed it into fridge then connected again?

Sounds to me as something that has equal chances either to fix or to destroy the motor :).
Last edited by SyRenity on November 18th, 2012, 11:52 am, edited 1 time in total.
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Re: Stuck Wheel Problem and Fix

Postby aziesemer2 » November 18th, 2012, 10:25 am

KKKK when I did it I was already resigned to buy a new one ;)
Anyway, the temperature in the refrigerator is just 0-5ºC and it's dry... it'll not destroy the motor :)
Also, 9v is less then the max voltage the motor was designed: 12v
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Re: Stuck Wheel Problem and Fix

Postby vic7767 » November 18th, 2012, 1:31 pm

I ran into this issue with an XV-11 Neato two years ago, I discovered a clearance issue with the mounting bolt and wheel surface. I replaced the screw and added the hardware in this photo:
Attachments
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Re: Stuck Wheel Problem and Fix

Postby glnc222 » November 18th, 2012, 2:57 pm

Is it too tight on the shaft, or too loose and the wheel rubbing on that fender?
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Re: Stuck Wheel Problem and Fix

Postby vic7767 » November 18th, 2012, 5:44 pm

It had some mechanical binding between the wheel and the bolt used to secure the wheel. With the new mod in place when 14 vdc is applied to the drive motor, it consumes .1 amp in either direction with no load.
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Re: Stuck Wheel Problem and Fix

Postby metabflux » November 21st, 2012, 12:57 am

My Neato XV12 generated a "Right Wheel stuck. . ." error as described by OP. The dysfunctional wheel was substantially more difficult to rotate than the functioning wheel as indicated by other posters with the same error.

I First tried running the wheel via USB using PuTTY and the SetMotor command in TestMode as described in the neato programers manual and suggested by glnc222 above. The wheel turned if manually rotated at the start of the command, but was inconsistent in speed and stopped frequently. However, the SetMotor command is limited to a maximum distance of 10 meters and therefore insufficient for the "break-in " method described by aziesemer2.

I then performed the "break-in" method as described in the original post by aziesemer2, with minor modifications. The wheel housing was removed and the motor was removed from the housing. The metal sleeve was removed from the motor. The red and black leads of the motor were connected to a 6 V adapter using alligator clips. Initially, the motor ran with substantial vibration and with uneven speed. A drop (~10 ul) of lubricating oil was applied to the inside of the casing through one of the screw holes with no immediate effect. The motor was operated for 30 minutes, at which point it was hot to the touch (almost unbearable to hold). The motor was allowed to cool at room temperature and the polarity was switched to run in the oposite direction for 30 minutes. This process was repeated 3 times in each direction. The motor eventually ran without changing speeds. After reassembly, the wheel turned noticeably easier than before the procedure, but not quite as easy as the unaffected wheel.

The robot has now run for ~3 hours since the "break-in" method without error. Many thanks to aziesemer2.
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Re: Stuck Wheel Problem and Fix

Postby aziesemer2 » November 21st, 2012, 1:46 am

metabflux wrote:...
The robot has now run for ~3 hours since the "break-in" method without error. Many thanks to aziesemer2.


:thumbup:
Nice to know that my instructions could help others having the same problem.
Looks like your results were very similar to mine. :)
Last edited by aziesemer2 on November 21st, 2012, 12:08 pm, edited 4 times in total.
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Re: Stuck Wheel Problem and Fix

Postby metabflux » November 21st, 2012, 1:52 am

I removed the motor because I wanted to test it independent of the mechanical binding issue raised by Vic7767. In my case, the motor itself rather than mechanical binding was the problem. Just to clarify, I did not disassemble the motor casing itself. The motor has a metal sleve around it for reasons that I don't completely understand, but I'm sure are important. This was removed during "break-in" because I thought it would help dissipate heat.
Last edited by metabflux on November 21st, 2012, 2:03 am, edited 3 times in total.
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