Variteck Posted January 4, 2021 Posted January 4, 2021 Hi everyone. As you know, the PF servo motor (88004) is out of production and the units left on the market are reaching collector's prices ... Do you know a valid alternative product? I tried with a couple of different Chinese copies of the 88004, but in both cases the steering control is not gradual, but only has 3 positions (all right, center all left). Would it be possible to program a PF motor, like the M motor, with Brickcontroller 2 or similar products, in order to rotate by a defined gradation and then automatically return to zero? I mean in a similar way to what the 42124 does through Control +, which through software transforms a normal motor into a servo motor. Quote
Jurss Posted January 4, 2021 Posted January 4, 2021 16 minutes ago, Variteck said: Would it be possible to program a PF motor, like the M motor, They don't have some position sensors, so it would be really difficult to make them postion correct. Quote
1gor Posted January 4, 2021 Posted January 4, 2021 The only way to use m-motor is to make solution similar to 42070 set and (from my experience) only on 2 wheel steering MOC or articulated steering using small linear actuators... I have similar problem because I own only 4 PF servos Quote
amorti Posted January 4, 2021 Posted January 4, 2021 (edited) If you're using it with buwizz, there is no Chinese servo which can do proportional steering, actually holding a middle position like what you want. If you're using it with Lego digital controllers, there are some which allow you to part-turn, then return, without having to hit 100% turn first. But it's hit and miss as to which they are, even among same manufacturers. https://youtu.be/FrKE3Hpxnfk There may yet be hope? Afraid I don't know much more than this video shows, though.I can only say that the white axle hole suggests this is a new type of Chinese servo. https://youtu.be/GOmWUtu3Qas Edited January 4, 2021 by amorti Quote
Variteck Posted January 4, 2021 Author Posted January 4, 2021 (edited) 1 hour ago, amorti said: If you're using it with buwizz, there is no Chinese servo which can do proportional steering, actually holding a middle position like what you want. If you're using it with Lego digital controllers, there are some which allow you to part-turn, then return, without having to hit 100% turn first. But it's hit and miss as to which they are, even among same manufacturers. https://youtu.be/FrKE3Hpxnfk There may yet be hope? Afraid I don't know much more than this video shows, though.I can only say that the white axle hole suggests this is a new type of Chinese servo. https://youtu.be/GOmWUtu3Qas Thanks Amorti, that's just what I was looking for. I will keep informed about this new white hole motor. Edited January 4, 2021 by Variteck Quote
Variteck Posted January 4, 2021 Author Posted January 4, 2021 How are other of you facing the Pf servo motors shortage? Quote
1gor Posted January 4, 2021 Posted January 4, 2021 52 minutes ago, Variteck said: How are other of you facing the Pf servo motors shortage? Well I have to make new plans for my MOCs, since I do not want to take assembled a part...the only problem for me is to make 4 wheel steering models... Quote
1gor Posted January 4, 2021 Posted January 4, 2021 There is a possibility with m-motor to but it will be stressful; something like on 8043 set, but I don't know anyone who played with 8043 for years, or anyone who managed to broke m-motor in 8043 set...so it is a bit difficult to help in advance... Quote
Mantarri Posted January 4, 2021 Posted January 4, 2021 (edited) I'm personally looking at just buying the BuWizz 3.0 with a friend whenever they started doing a 2 unit bundle, as it supports both PF, and PU, and buying some PU motors on Bricklink, as they can be used as servos. Edited January 4, 2021 by MisteryMan Quote
1gor Posted January 4, 2021 Posted January 4, 2021 53 minutes ago, MisteryMan said: I'm personally looking at just buying the BuWizz 3.0 with a friend whenever they started doing a 2 unit bundle, as it supports both PF, and PU, and buying some PU motors on Bricklink, as they can be used as servos. That is not such a bad idea after all... Quote
chlego Posted January 5, 2021 Posted January 5, 2021 20 hours ago, I_Igor said: I have similar problem because I own only 4 PF servos "only"... I own 2... Quote
1gor Posted January 5, 2021 Posted January 5, 2021 2 hours ago, chlego said: "only"... I own 2... I have started buying parts because after taking MOC apart lots of parts become loose or even broke... But this problem - how to replace servo is a big problem; BuWizz is not cheap - 150€ Quote
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