So, the charging system "sees" an acceptable thermistor resistance, and does engage a reasonable charging session; thus, demonstrating that the 560's main_PCA is charging-functional.jdell42 wrote:I also have just started to get charging error 1. ...
My older battering does not get this error but it only charges for about 5 minutes and ... the robot will not run more than 10 seconds.
John, I think evidence is stacked against taking the "connection" (of battery thermistor to main_PCA ) off the table. One more test might be able to recommend additional research into the viability of those thermistor contacts.... I then decided to eliminate the terminal connection variable by connecting the 4 terminals on the robot to the battery with some jumper wire. Same result error 1 when connecting it to the power supply via the plug on the robot. Note I have two base stations and power supplies and the error 1 problem is repeated whether I plug the power supply into the robot or put it on the base station.
So I have eliminated the power supply / base, battery and the connection between the robot. ...
jdell42 wrote:Thanks.. I would like to keep the scheduling functionality of the 560.... so it sounds like a new motherboard unless someone has fixed this one.
TechGuy wrote:Are the green taps are lying horizontally on top of the battery? The extra thickness is required to ensure good contact with the thermistor.
TechGuy wrote:What is the resistance between the two small thermistor terminals? It should be around 10K ohms.
jdell42 wrote:...
The new "non functioning" battery will not register any resistance. For my two other batteries that will not hold a charge one shows 9.6K, one jumps around between 1 and 50K. The working battery is in the robot and I dont want to mess with it.
Study this graph:matofill wrote:What will be if we have thermistor, which have at room temperature ( 22st C ) 8,6 K OHM , and than we add series ...one resistor cca 2 - 3 k ohm in batteries... What do you thing ??? ...
I know nothing about any FW-07 upgrade. (Maybe vic7767 has some knowledge about it.) But, then you write:matofill wrote:...Roomba 530 have before FW 02 and i upgraded to last FW to 07 ... , after that Roomba do not want to charge battery , they charge it only 15 minutes ...
In that sentence I interpret that "1 year old original Metapo" battery had been powering your 530 properly for a year; and, that means the thermistor resistance was correct (viz., 10k ohms at 25C). No FW upgrade can affect thermistor resistance, so how did it become "at 25 st C only 4, 2 k OHM"? I can only guess that you may have run a charging session, and when charging stopped you quickly removed the battery from the robot and measured thermistor resistance. Is that what you did?...Then i check the thermistor, battery was 1 year old original Metapo 3500 mAh NiMh and thermistor have at 25 st C only 4, 2 k OHM ...
Well, let's say iRobot revised Roomba's battery-temperature sensing algorithm such that high-temperature cut-off would occur in the 40 to 45C temperature region, and with the result that Roomba's battery could not be fully charged in the charging time taken to elevate cell temperatures to the cut-off temperature. I find it hard to believe that iRobot would not find some way to carry charging to completion, even though it takes six hours, or more, to do it. One way would be to incorporate cool-down periods between charges to temp-cut-off. Another would be to moderate charging current to lower levels, thus avoiding heating until cells obtain full charge levels.... so i thing robot are now after FW upgrade more careful and they thing that battery is too hot approx. about 40 st C and that they are full and then they stop with charges it ........ and normally if they charge it only 15 minutes, they can work only for a short time...
I question the use of "OEM", the abbreviation for Original Equipment Manufacturer. Someone may tell differently, but IMHO iRobot has never sold any "4500 mAh" Roomba battery. If what I say is true, then your 4500 mAh battery is a third party battery, not 'OEM".... i tested another OEM battery 4500 mAH NiMH and they also have at 25 st C 4,8 k OHM, but my basic 581 robot works OK with it even i thing that they charge it too short time ???
I think: 1) it might be possible for a FW revision to reasonably shift calculated battery temperature as you have determined via ultra short charging periods, and 2) I suspect your ohmmeter ought to be verified to read about 10k ohms when a new 10k ohms resistor is measured.So what do you thing can be this thermistor problem, that robot charge battery to short time or ?...
Not to worry, your English is 10,000X better than my Slovenian!Sorry for my English, but it is not my native language, Greetings from Slovenia in Europe.
Gordon wrote:I know nothing about any FW-07 upgrade. (Maybe vic7767 has some knowledge about it.)
Well, I do recall there to be a 500-series OSMO, but do not recall anyone tagging it with any numeric revision level, such as "07". So, that was strange to me.vic7767 wrote:Gordon wrote:I know nothing about any FW-07 upgrade. (Maybe vic7767 has some knowledge about it.)
iRobot did come out with an OSMO to resolve the short lifecycle of the stock 5XX Roomba battery. Also included in that same OSMO patch was a fix for the newer IR pulsed Auto Virtual Wall so they could be used with the earlier 5XX model Roombas.
Return to iRobot Roomba and Scooba Chat
Users browsing this forum: 911medic, Brett, drude1, Flole, im1kissfan, johnnyh, KeldBroe, lanchez, loisebond23, magura, vic7767 and 395 guests