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10th Nov 2019, 06:32 PM #46Most Valued Member
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Magnet Polarity
I turned the magnet over this morning. It definitely has an effect. Not quiet what I was hoping for though.
With it turned over the tacho didn't work at all. Just sat there displaying four Zero's.
So I changed it around again.
Its still fluctuating. Maybe its just a heap of crap. Most of the stuff I have bought from Banggood has been ok so I suppose I have to expect a dud occasionally.
Here's a 30 second video I took this morning. Motor running at a set frequency.
https://youtu.be/KUzLDjr0X5o
Peter
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10th Nov 2019, 06:46 PM #47
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10th Nov 2019, 06:53 PM #48Most Valued Member
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10th Nov 2019, 07:59 PM #49Member: Blue and white apron brigade
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10th Nov 2019, 09:08 PM #50Most Valued Member
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10th Nov 2019, 11:33 PM #51
Hi Peter,
Can you post a picture of the label on your sensor please.
Also distance can be critical as well. You could build a test rig with a wood disc holding the magnet and run it in a drill press, then adjust the sensor distance to determine how far away it needs to be.Best Regards:
Baron J.
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11th Nov 2019, 08:32 AM #52Member: Blue and white apron brigade
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Most sensors have a red LED on the back of them and this lights up when the right distance is achieved.
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11th Nov 2019, 06:45 PM #53Most Valued Member
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I was going to do that tonight but I've had a big day and then with the predicted bushfire danger tomorrow, I thought it might be a god idea to clean the roof and gutters of my shed off when I got home from work. We live in suburbia and no large tracts of bush nearby (couple of Klms) but embers can travel a fair way so better to be safe than sorry.
I've had a look through my pics but don't have a decent one. So tomorrow arvo hopefully.
peter
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12th Nov 2019, 03:12 AM #54
Hi Peter,
I only found out about the bush fires, from the news on TV today !
Looking after yourself and family are more important than a picture ! I wish we could swap some of our rain for your dry weather for a while.Best Regards:
Baron J.
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12th Nov 2019, 06:02 PM #55Most Valued Member
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Thanks
We are ok but there are plenty of others on this forum who could be (maybe have been) effected.
The biggest problem for us is the smoke. If that's the only problem we have then I'll be happy.
I feel for those who have last their homes and, with some, even loved ones.
Its also pretty devastating thinking about the wild life (and domesticated animals) that have been killed. Then there will probably be some who survive the fire only to die of injuries or starve to death afterwards with nothing to eat.
Edit. Sensor pics added. As the label is wrapped around the sensor Ive had to take four pictures so the info can be read.
sensor 01.jpgsensor 02.jpgsensor 03.jpgsensor 04.jpg
peterLast edited by bollie7; 12th Nov 2019 at 06:36 PM. Reason: added pics
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12th Nov 2019, 06:49 PM #56Most Valued Member
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Take care Peter.
Sent from my SM-G970F using TapatalkGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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12th Nov 2019, 07:11 PM #57
Peter,
here is the bracket I made if this helps, The magnet holds itself onto the pulley (hasn't come off yet even at 3000rpm)
I used a spare piece of smoke coloured perspex and heated it with a heat gun and bent it over a piece of timber, drilled my holes first
Rick
20181109_144812 (Medium).jpg
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12th Nov 2019, 09:00 PM #58Most Valued Member
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Thanks Simon.
We are not in a fire area, thankfully. The only advantage of living in suburbia. There are bush areas a couple of klms away but they are the sort of thing you get in scattered pockets. I do really feel for the poor buggers who have lost their homes etc though.
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12th Nov 2019, 09:03 PM #59Most Valued Member
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Thanks for the pic Rick. I might end up having to something similar with mine however I suspect I might have killed the sensor when I first got it trying it out. The first one I got everything was in chinese on it, so I think as I'm didn't know much about them, I probably wired it up incorrectly.
peter
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12th Nov 2019, 09:39 PM #60
Hi Peter, Guys,
Thank you for the pictures, I've not found any new information about them. I hadn't realised that there was a LED tell tale at the cable end. Simply waving a magnet around the front should cause the led to flash when power is applied. However if the led is faulty, you might be able to see a voltage transition on the output lead using a multimeter. If it doesn't then I agree its dead.
The display should be OK though. I don't know of a simple way to test that, though I can tell you that it is identical to the one on the mill and that takes input from an optical slot sensor.Best Regards:
Baron J.
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