Electronics > Repair
Garden Shredder problem
Whales:
EDIT: Had wrong forum member's name, apologies.
--- Quote from: wilfred on June 14, 2023, 11:13:30 am ---And I don't think the AI response (if it was) was unhelpful or disruptive to the thread or the forum.
--- End quote ---
The answer given was bad. The fact they are "obvious AI" simply means that they will be consistently bad. These two things combine to make AI replies a very easy ban in most communities.
Large language models created with unsupervised learning (chatgpt and its kin) are able to generate answers that look legitimate, but are in actual fact misleading or plain wrong. They are very good at using artistic license (great for creative works) but very poor at respecting other forum members (abysmal at technical & social works). In other words they lie.
The reply by barshatriplee is, in this case, only wrong and frustrating (especially for the OP if they believe what it writes). It is not clearly unsafe in this particular circumstance (it's not recommending a dangerous procedure).
--- Quote ---I think cancelling them was an overreaction and unwarranted in this case.
--- End quote ---
Perhaps. Banning people isn't perfect. I hope barshatriplee finds a way of contributing their own non-bot answers again.
--- Quote --- When you replaced the capacitor in your garden shredder, it's possible that there might be an issue with the wiring or the motor itself.
--- End quote ---
It is highly unlikely the device had this issue before the capacitor was replaced.
--- Quote --- Ensure that you have replaced the old capacitor with the correct one in terms of capacitance value and voltage rating. Using an incorrect capacitor can lead to unexpected motor behavior and potentially damage the motor.
--- End quote ---
If the bot could read photos it would see that the cap is correct. Instead it's wasting time and potentially sowing doubt in the mind of the OP about the cap choice, something I do not want to do to them.
--- Quote --- Double-check the wiring connections you made during the capacitor replacement.
--- End quote ---
turgle: This is the most likely to be correct answer. Hidden in a list of many incorrect suggestions.
I suspect you have mixed up the wires. Induction motors will run in reverse if you re-arrange the wires in certain ways. The turn-off might be caused by a mechanical issue (perhaps it jams when spinning backwards) or by a thermal switch detecting overheat (perhaps you have mixed up the run coil & the cap coil, the latter overheats if miswired).
--- Quote --- There might be an issue with the motor windings, such as a short circuit or a fault in the winding insulation. This can lead to the motor accelerating rapidly in reverse before shutting off as a protective measure. A faulty motor might require professional repair or replacement.
--- End quote ---
That's fun to think about. It would need some very creative short circuits in the field coils for a single-phase induction motor to go in reverse.
Ian.M:
--- Quote from: Whales on June 14, 2023, 12:12:02 pm ---...
The reply by bdunham7 is, in this case, only wrong and frustrating (especially for the OP if they believe what it writes). It is not clearly unsafe in this particular circumstance (it's not recommending a dangerous procedure).
...
--- End quote ---
Why drag bdunham7 into barshatriplee's misdemeanours?
--- Quote from: Whales on June 14, 2023, 12:12:02 pm ---
--- Quote --- There might be an issue with the motor windings, such as a short circuit or a fault in the winding insulation. This can lead to the motor accelerating rapidly in reverse before shutting off as a protective measure. A faulty motor might require professional repair or replacement.
--- End quote ---
That's fun to think about. It would need some very creative short circuits in the field coils for a single-phase induction motor to go in reverse.
--- End quote ---
Fun indeed. Such a fault would need to essentially reverse the flow of current in the major part of one winding, which would require two winding to winding short circuits + two parts of the winding fusing open. With conventional distributed windings in a slotted stator induction motor construction, I think that's vanishingly improbable.
bdunham7:
--- Quote from: wilfred on June 14, 2023, 11:13:30 am ---I think cancelling them was an overreaction and unwarranted in this case.
--- End quote ---
Maybe. We don't know what happened behind the scenes, but I've seen posts from this user before and it just seemed like they have a significant translation issue along with them being new to the forum and maybe not 'fitting in'. I'd hate to see EEVBlog become cliquish and unwelcoming. I haven't seen any attempt from this user to spam the forum or commit any fraud.
Skimming their past posts, many appear to be genuine attempts to be helpful. Admittedly, the one in this thread is clearly not very helpful. One of the potential uses of AI like ChatGPT is to help non-native speakers to appear more fluent and natural. Unfortunately, if they don't have a way of reviewing the result, it may appear quite odd and 'AI-like' even though the base content was not AI-generated.
Whales:
--- Quote from: Ian.M on June 14, 2023, 12:20:12 pm ---
--- Quote from: Whales on June 14, 2023, 12:12:02 pm ---...
The reply by bdunham7 is, in this case, only wrong and frustrating (especially for the OP if they believe what it writes). It is not clearly unsafe in this particular circumstance (it's not recommending a dangerous procedure).
...
--- End quote ---
Why drag bdunham7 into barshatriplee's misdemeanours?
--- End quote ---
Corrected, thankyou. Apologies to bdunham7 and barshatriplee.
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