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Post by PACNATIC (hyperobscurehunter) on Aug 11, 2017 18:02:53 GMT -7
On my metalback Teddy everything works except the upper jaw. When I got him (which was a few years ago) none of the motors worked. I got the eyes and lower jaw to work the day he arrived so now I'm thinking the motor is frozen. Any suggestions?
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Post by DollyPrince on Aug 14, 2017 2:29:57 GMT -7
The standard procedure for fixing motors should work, as explained by the videos from Blueoctopede.
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Post by Kevin on Aug 21, 2017 4:28:36 GMT -7
Hi I repair a lot of Teddy Rexpins here in the uk and a lot of them have broken eyes and broken jaws from trying to make them work using the "Massage Trick" although this may work, the only real way is to rebuild the opertaing servos.
Kevin Teddyruxpinhospital.com
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Post by DollyPrince on Aug 23, 2017 22:28:05 GMT -7
No, the rebuilding the servos is NOT the only way to fix a Teddy Ruxpin. I have also been repairing them for many years. While massaging from the outside may be risky if you aren't careful due to the age of the plastic parts, directly massaging the motors works fine. I've never had any of the WoW toy in my old or new collections freeze up again after this treatment, and I had my old collection for about a decade.. I understand you are trying to sell your services, but please don't exaggerate.
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Post by Kevin on Sept 6, 2017 4:11:40 GMT -7
Hi Dolly Prince Thanks for reply to my comments about the "massage trick". I can only offer my advice after repairing 100s of Teddy Ruxpins, that have been sent to me for repair. With a number having snapped eyes and jaws. When I dissemble the servos in all circumstances there is a build up of solid grease around the commutator and armature assembly that prevents the correct electrical contact taking place. I have found that by cleaning the armature with solvents and re-lubricating with fine oil, will together with re adjusting the pressure exerted by the copper brushes against the commutator. This will then enable the servos to work perfectly well, assuming that the internal rubber belts have not stretched. The "Massage Trick" tries to move the armature backwards. Although this may work, the ratio of the final movement of the servo is considerably reduced due to the internal gearing of the servo, therefore the effect is fairly minor in the overall scheme of things. In the UK Teddy Ruxpins have been stored in house lofts which over 30 plus years have temperature cycled the bears from probably minus 15 degrees C to 50 degrees 100's of times. This is what causes the solidification of the grease within the armature assembly. I can only assume the bears you have managed to resurrect have been kept in a reasonably constant temperature, whereby only a small movement / jog is sufficient to reactivate the servos. I congratulate you on the success you have with "Massage Trick", unfortunately it also produces bears that are severely broken. There is no exaggeration in my claims, as it is based on many years experience, I only repair Teddies as a hobby and try to prevent owners unwittingly breaking their bears further, rather than trying to "sell" my service. The explanation I trust, will help you with my comments. Kevin WWW.Teddyruxpinhospital.com
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Post by d.ruxpin on Sept 6, 2017 13:54:14 GMT -7
No, the rebuilding the servos is NOT the only way to fix a Teddy Ruxpin. I have also been repairing them for many years. While massaging from the outside may be risky if you aren't careful due to the age of the plastic parts, directly massaging the motors works fine. I've never had any of the WoW toy in my old or new collections freeze up again after this treatment, and I had my old collection for about a decade.. I understand you are trying to sell your services, but please don't exaggerate. Well, rebuilding them is the only way to fix them properly, he means. If you just massage it it'll still be all dirty and all sorts of gunk will still be stuck inside the servo. I have to agree with Kevin here, reconstruction is the way to go.
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Post by trfan2002 on Sept 21, 2017 17:42:00 GMT -7
I'm just going to keep massaging my teddy ruxpin's top jaw for some time. I got to get the fur restuffed, sewed up and hot glued back to my teddy's foam base.
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Post by late2theparty on Sept 22, 2017 5:29:49 GMT -7
An interesting debate here. But what's missing in providing advice on the question is the possibility that the problem may not be in the servo, but in the board. First step I always undertake where a nose or jaw servo is not working - reverse the plugs to be certain that the board is working properly and sending a signal to the non working servo. By reversing when, for example, jaw works but nose doesn't, if you find the nose now works but jaw does not, you would dealing with a board issue. As to the question of massage versus full rebuild, I think that massage can and often does bring a non working servo back to life and working properly. But it is a touch and feel procedure that can go very wrong if done with too much pressure. And it can be futile if done too vigorously. I would say that you really need to know and understand the inner workings of Teddy's head in order to avoid problems. And knowing that also gives you a sense of whether or not the servo is actually too frozen for it to work and will require removal and service. I've pulled more than a few of these servos completely apart to clean and regrease them. Anyone who has not would be surprised at the number of plastic gears (and belts in the late ones) in there. Too heavy a hand on the massage trick can not only break the plastic moving parts in the frame, but can break off teeth on the internal gears. I would say that the massage trick works more times than not when done with care and patience, as it may take quite a bit of massaging before a servo starts working as it should. Is removal, disassembly, cleaning and regreasing a more thorough option? Probably...in fact almost certainly so. But unless and until someone understands how the servo goes together internally, disassembly may well lead to someone sitting there and looking at a pile of case and gear parts and wondering "What now???" Disclaimer - I have taken and put back together a number of these servo motors, and even done 2fer1 builds of them, I can understand what is being referenced above. I still have no real clue of how they really operate in conjunction with the board, though. So when it turns out to be a wiring problem due to someone having messed with the wires or connectors before it came to me, that becomes trial and error. Proof that there is always more to learn.
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Post by FilthyAnimal on Sept 23, 2017 8:52:55 GMT -7
Is there a tutorial out there on how to rebuild a motor? I've looked before but haven't found one.
Also Kevin, what type of lubricating oil do you use? I have normal lithium grease, but I imagine that may not work in such a small confined space. (I'm still new to repairing these toys, sorry)
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