So I recently got a osr-2 pre built with lube dispenser, twist and suction. Upon testing it, I noticed only the right servo arm was moving, today I tested it again but this time it doesn’t respond at all to power.
Since Im don’t know much about tech stuff I ordered it pre build.
What is there I can do to make it work?
Thanks in advance!
Firstly how do you feel about opening it up?
Second have you gotten in contact with the person who sold you it? (If anything is actually wrong with it they should be the one to talk to about fixing it as you only just got it)
3 Likes
I have gotten into contact with the person who sold it to me, sadly after a week no reply.
I already opened it once but didn’t understand what was going on so I didn’t touch anything.
That’s not good in my view that the maker hasn’t responded to you after taking your money. That’s something you have to decide on with how you’ll proceed/deal with it all.
However it is good that you’ve actually been more than willing to open it up by doing so already. As well I hope at least that you purchased it with the knowledge that you will have to do servo replacements in the future which requires fiddling with the insides and some specific tools.
As you don’t know much about text stuff means it would be best if you take photos and try to keep track of all screws as you go so you can have something to refer to when putting it back together again and how everything looked like.
Back though to looking at this weird arm that isn’t moving. When power is off it is just like all other arms yes? (Slight resistance to moving but move-able and not stiff) When powered on is it still the same as the other arms where they make move slightly or gain a bit more resistance? When you plug in the USB cable all the arms reset/jump/jolt to specific positions including this suspect arm?
If no then is it consistent via repeating all tests 5 times slowly?
If the answer is still no to that arm being different then either the servo died (biggest sign of this is via it being very resistant to moving) or (as there chance is slight) a cable came out of where it should have been which connects to that servo. Regardless of which you will need to open it up again and this time have to mess with the insides. If it’s the cable then you’ll need to first see if any cables are loose or look like they are out of place, how the board looks (anything looking like black scorch marks) and make sure all the cables coming from the suspect servo are definitely connected. Depending on how the cables are held in (mine were lever switches) you may need a tool to refix/connect them if using your finger isn’t possible. If you feel that you need to remove the board then you’ll most likely need to use an PZ0 screwdriver which you can also use as a tool for the cable connections as it’s pretty thin.
If it’s the servo that died (which is overall more likely) then all the above is still useful since you need to replace the servo yourself via messing with the cable connections. But first you need to look at the servo that’s in it and get the exact same one again, as getting one that is different via being able to go faster or has more range will cause problems since it will be like someone switched one of your legs out with one that is shorter/longer or weaker/stronger that your other one has to adjust to that…but it can’t. So it’s important to have all servos be the same ones.
Once you have your replacement servo it’s time to take out the broken one and put the new one in, however before you fully put in the new one I suggest connecting it to the circuit board and give the device power and USB connect to make sure that the servo does respond and didn’t arrive faulty. (also to make sure that the board really isn’t the hidden problem child) As bonus too the servo should then be in it’s default position and ready for you to attach the gear arm and then the plastic arms to it. (after installing it fully into the OSR2)
Then all you need to do is give it a SLOW movement test to make sure you didn’t install it upside down and if it overall just works.
Hope that all makes sense and good luck.
1 Like
Thank you very much, I will try and look into it.
This information already helps a ton thanks!