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R2D2 not completing start up. Options
semaj
#21 Posted : 12 December 2018 19:01:09

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PeterP wrote:
arpurchase wrote:
PeterP wrote:
arpurchase wrote:
arpurchase wrote:
Hi Peter can you check with a test meter [if you have one]if you are getting power from the battery box by testing the power lead from the battery box.


Do the test with the batterys in the battery box but taken out of R2 so your testing the contacts that go into R2'S black box.


12.29v on the black plug


The battery box looks ok.


What i'm not sure of is when I check the batteries individually they are all about 4.11v each which means there is about 24v going into the battery box but only 12.29v coming out?

3 sets of parallel pairs. so 3 x 4.11 = 12.33v there or there about's. the series pairs would give the capacity of each pair added together, so if you had 2500mah cells, you would have double this - 5000mah of capacity with 12v ish. current power is not multiplied.
[center]building: R2D2
Building: Red Bull RB7 RC kit
PeterP
#22 Posted : 12 December 2018 19:05:16

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semaj wrote:
PeterP wrote:
arpurchase wrote:
PeterP wrote:
arpurchase wrote:
arpurchase wrote:
Hi Peter can you check with a test meter [if you have one]if you are getting power from the battery box by testing the power lead from the battery box.


Do the test with the batterys in the battery box but taken out of R2 so your testing the contacts that go into R2'S black box.


12.29v on the black plug


The battery box looks ok.


What i'm not sure of is when I check the batteries individually they are all about 4.11v each which means there is about 24v going into the battery box but only 12.29v coming out?

3 sets of parallel pairs. so 3 x 4.11 = 12.33v there or there about's. the series pairs would give the capacity of each pair added together, so if you had 2500mah cells, you would have double this - 5000mah of capacity with 12v ish. current power is not multiplied.


That explains that, so what i'm getting out of the battery box is about right then, so the problem may lie with the MCU?
arpurchase
#23 Posted : 12 December 2018 20:40:06

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Recheck all your labels are correctly placed and plugged into the correct sockets and no pins are missing or bent.
Current builds:-C57,Zero, Lamborghini Countach, Caldercraft HMS Agamemnon,Robi,R2-D2, MFH Cobra .

PeterP
#24 Posted : 12 December 2018 20:40:58

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arpurchase wrote:
Recheck all your labels are correctly placed and plugged into the correct sockets and no pins are missing or bent.


Yup done that still the same problem?
StevePB
#25 Posted : 12 December 2018 20:42:16

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arpurchase wrote:
arpurchase wrote:
Hi Peter can you check with a test meter [if you have one]if you are getting power from the battery box by testing the power lead from the battery box.


Do the test with the batterys in the battery box but taken out of R2 so your testing the contacts that go into R2'S black box.


I've done that too - 12.5V here. Checked continuity between battery and the contact plates and springs at each end and all OK. The only other thing I've not checked is the small 4 pin charging cable/plug. It is recessed well in the plastic CPU cover and will be difficult to remove. I'll try and get it out tomorrow and see what if any voltages are on each pin.
PeterP
#26 Posted : 12 December 2018 20:42:17

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Hate to keep asking this but could it be a dodgy MCU?
arpurchase
#27 Posted : 12 December 2018 20:44:48

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Can you please recheck as I have asked . I am not there with your R2 so I need to eliminate various possabilitys before we move on.
Current builds:-C57,Zero, Lamborghini Countach, Caldercraft HMS Agamemnon,Robi,R2-D2, MFH Cobra .

StevePB
#28 Posted : 12 December 2018 20:45:06

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PeterP wrote:
arpurchase wrote:
Recheck all your labels are correctly placed and plugged into the correct sockets and no pins are missing or bent.


Yup done that still the same problem?


Me too - looks like we are the unlucky ones. Faulty component looking more and more likely, but which one?
PeterP
#29 Posted : 12 December 2018 20:45:42

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StevePB wrote:
arpurchase wrote:
arpurchase wrote:
Hi Peter can you check with a test meter [if you have one]if you are getting power from the battery box by testing the power lead from the battery box.


Do the test with the batterys in the battery box but taken out of R2 so your testing the contacts that go into R2'S black box.


I've done that too - 12.5V here. Checked continuity between battery and the contact plates and springs at each end and all OK. The only other thing I've not checked is the small 4 pin charging cable/plug. It is recessed well in the plastic CPU cover and will be difficult to remove. I'll try and get it out tomorrow and see what if any voltages are on each pin.


Can't see it being that, if you plug in the charger and charge R2 up and press the power button R2 doesn't jerk forward obviously to stop R2 running away whilst plugged in
PeterP
#30 Posted : 12 December 2018 20:48:05

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StevePB wrote:
PeterP wrote:
arpurchase wrote:
Recheck all your labels are correctly placed and plugged into the correct sockets and no pins are missing or bent.


Yup done that still the same problem?


Me too - looks like we are the unlucky ones. Faulty component looking more and more likely, but which one?


Well unfortunately most of the wire are plugged into the MCU, so that may need changing!!!!!!
StevePB
#31 Posted : 12 December 2018 20:48:17

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PeterP wrote:
arpurchase wrote:
PeterP wrote:
arpurchase wrote:
arpurchase wrote:
Hi Peter can you check with a test meter [if you have one]if you are getting power from the battery box by testing the power lead from the battery box.


Do the test with the batterys in the battery box but taken out of R2 so your testing the contacts that go into R2'S black box.


12.29v on the black plug


The battery box looks ok.


What i'm not sure of is when I check the batteries individually they are all about 4.11v each which means there is about 24v going into the battery box but only 12.29v coming out?


They are in three paralleled pairs, so half the total cell voltages BigGrin
PeterP
#32 Posted : 12 December 2018 20:50:59

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StevePB wrote:
PeterP wrote:
arpurchase wrote:
PeterP wrote:
arpurchase wrote:
arpurchase wrote:
Hi Peter can you check with a test meter [if you have one]if you are getting power from the battery box by testing the power lead from the battery box.


Do the test with the batterys in the battery box but taken out of R2 so your testing the contacts that go into R2'S black box.


12.29v on the black plug


The battery box looks ok.


What i'm not sure of is when I check the batteries individually they are all about 4.11v each which means there is about 24v going into the battery box but only 12.29v coming out?


They are in three paralleled pairs, so half the total cell voltages BigGrin


Yes semaj did explain that earlier in the thread LOL
StevePB
#33 Posted : 12 December 2018 20:51:51

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arpurchase wrote:
StevePB wrote:
PeterP wrote:
StevePB wrote:
Hi guys - I've got a problem with my R2D2. It wont start up Crying . On power up it moves forward slightly but that's it. LED on front is RED and head does not move. Batteries are fully charged, in the correct way and after initialisation there is 12.5V on the main output, before initialisation 0V (black plug). Possibly related it does not sense that it is being charged, charger does charge the batteries but the indicator LED just stays red. I've checked all the wiring and cant see any missing, in the wrong ports or inserted incorrectly.

Help!!


I have exactly the same problem!!!!!!!!!!!!
and i have checked everything, of course the next question is what is your batteries continuous discharge rate?



High discharge type for me 30A !! - As for problem it not sensing charging points to either battery box itself or MCU :(


Can you also double check all your leads are labeled and places correctly as per the instructions and that all pins are straight where the conectors go in.


Done triple check by both me and a colleague - all correct.
PeterP
#34 Posted : 12 December 2018 20:53:49

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StevePB wrote:
arpurchase wrote:
StevePB wrote:
PeterP wrote:
StevePB wrote:
Hi guys - I've got a problem with my R2D2. It wont start up Crying . On power up it moves forward slightly but that's it. LED on front is RED and head does not move. Batteries are fully charged, in the correct way and after initialisation there is 12.5V on the main output, before initialisation 0V (black plug). Possibly related it does not sense that it is being charged, charger does charge the batteries but the indicator LED just stays red. I've checked all the wiring and cant see any missing, in the wrong ports or inserted incorrectly.

Help!!


I have exactly the same problem!!!!!!!!!!!!
and i have checked everything, of course the next question is what is your batteries continuous discharge rate?



High discharge type for me 30A !! - As for problem it not sensing charging points to either battery box itself or MCU :(


Can you also double check all your leads are labeled and places correctly as per the instructions and that all pins are straight where the conectors go in.




Done triple check by both me and a colleague - all correct.

PeterP
#35 Posted : 12 December 2018 20:54:24

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PeterP wrote:
StevePB wrote:
arpurchase wrote:
StevePB wrote:
PeterP wrote:
StevePB wrote:
Hi guys - I've got a problem with my R2D2. It wont start up Crying . On power up it moves forward slightly but that's it. LED on front is RED and head does not move. Batteries are fully charged, in the correct way and after initialisation there is 12.5V on the main output, before initialisation 0V (black plug). Possibly related it does not sense that it is being charged, charger does charge the batteries but the indicator LED just stays red. I've checked all the wiring and cant see any missing, in the wrong ports or inserted incorrectly.

Help!!


I have exactly the same problem!!!!!!!!!!!!
and i have checked everything, of course the next question is what is your batteries continuous discharge rate?



High discharge type for me 30A !! - As for problem it not sensing charging points to either battery box itself or MCU :(


Can you also double check all your leads are labeled and places correctly as per the instructions and that all pins are straight where the conectors go in.




Done triple check by both me and a colleague - all correct.



Me too, checked and rechecked?
PeterP
#36 Posted : 12 December 2018 21:01:02

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arpurchase wrote:
Can you please recheck as I have asked . I am not there with your R2 so I need to eliminate various possabilitys before we move on.


Have rechecked all wires they are plugged in the right sockets and the right way round, so I don't know what more can be done to eliminate the possibilities
arpurchase
#37 Posted : 12 December 2018 22:06:08

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Build-Diary Medal: Build-Diary Medal of HonourPublisher Medal: Article published MedalActive Service Medal: 500 post active service MedalPurple Medal: Super active service medal for 1000 postsRed Medal: Red MedalTurquoise Medal: Turquoise Medal for model making know-how contributionOutstanding Build: An award for an outstanding build
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Can both of you reorder the PCB board from Issue 99 . Steve Pb can you just post on here from now on if you have further proplems after you refit the replacement PCB.

PeterP can you please start your own thread with your problem from here on to separate the two builds and prevent confusion. Also PeterP can you start by posting the full spec that should be available from the vendor of your battery on your new thread.

Thanks

Andy
Current builds:-C57,Zero, Lamborghini Countach, Caldercraft HMS Agamemnon,Robi,R2-D2, MFH Cobra .

PeterP
#38 Posted : 12 December 2018 22:15:55

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arpurchase wrote:
Can both of you reorder the PCB board from Issue 99 . Steve Pb can you just post on here from now on if you have further proplems after you refit the replacement PCB.

PeterP can you please start your own thread with your problem from here on to separate the two builds and prevent confusion. Also PeterP can you start by posting the full spec that should be available from the vendor of your battery on your new thread.

Thanks

Andy


Ok will do
StevePB
#39 Posted : 13 December 2018 00:38:42

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arpurchase wrote:
Can both of you reorder the PCB board from Issue 99 . Steve Pb can you just post on here from now on if you have further proplems after you refit the replacement PCB.

PeterP can you please start your own thread with your problem from here on to separate the two builds and prevent confusion. Also PeterP can you start by posting the full spec that should be available from the vendor of your battery on your new thread.

Thanks

Andy


How do I do that? I didn't subscribe but purchased via my newsagent.
stwood6
#40 Posted : 13 December 2018 01:02:47

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Though I haven’t worked with a complete r2 yet, I’ve worked with many Pi’s, oranges and similar boards before. If a person were to plug an hdmi cable into the orange pi and into a tv - would they be able to observe the boot up sequence, and possibly any boot up errors that may reveal the root cause for their r2 problems?
Current Builds: R2D2, Millenium Falcon
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