BrachioGraph – a cheap, simple pen plotter

Re:BrachioGraph – a cheap, simple pen plotter by DanieleProcida on Thursday October 17, 2019 @10:59AM (#21282729)

Be careful, a lot of SG90 servos are fakes. Below a certain price, they all appear to be counterfeit.

As far as I can tell, the real ones have four screws in the base, and "TowerPro" printed into the plastic on the top. The fakes have two screws, no brand name moulded into the plastic, and inevitably stop working quite swiftly.

https://brachiograph.readthedocs.io/en/latest/explanation/ha...

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Re:BrachioGraph – a cheap, simple pen plotter by bmordue on Friday October 18, 2019 @06:17AM (#21290081)

Awesome project! Newer SG90 are described as a digital servo: http://www.towerpro.com.tw/product/sg90-7/ Should the older analog version (or perhaps a different part entirely?) be used for brachiograph? There's a note in the docs about analog servos being more suitable for this application.

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Re:BrachioGraph – a cheap, simple pen plotter by mileycyrusXOXO on Friday October 18, 2019 @02:48AM (#21289194)

I just assumed they were all terrible, maybe I've just been getting counterfeits this whole time. I'll have to check.

Where do you normally order from to guarantee originals?

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Re:BrachioGraph – a cheap, simple pen plotter by sandos on Friday October 18, 2019 @04:00AM (#21289479)

Would a counterfeit be a problem for this particular application? Dont they still work?

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Re:BrachioGraph – a cheap, simple pen plotter by mileycyrusXOXO on Friday October 18, 2019 @11:03PM (#21296527)

Half of them break just assembling whatever you are building.

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