At the moment I'm also working on a magnetic tumbler for jewellery and maybe small art pieces size slave bracelet squared but having a hard time choosing an engine. What RPM and Wattage would you recommend?
The details are in the video on the motor I think it's 1/3 of a horsepower or maybe 1/2 I will check. I can't remember the rpm varies on what you have in it I've found about 800 is a good starting point on mine
@@Josef1cnc I did find the section where you showed the motor's technical details but you did mention that it was quite a bit overpowered ;) At the moment I'm pondering between 2 motor types. 1 with a max rmp of 3000 (effectively 2750) and 2000 rmp (effectively 1750) I know I can use a frequency dimmer to control the speed but I will also lose torqe. If 1750 would be way more than enough than that motor will be my choise, otherwise I should turn towards the 3000 but there are few people giving experience with softer metals like silver. Hence the question. What is the max rmp you use?
@@rolfvanderbijl The motor runs to 2760 on the tag I use between 30% and 60% of that anything higher doesn't seem to work for me so that just over 1500 rpm I think. I have recently tried 0.2mm pins in it and have to run slower around 40% for it to work nicely. I guess the magnet strength, size of rotor disc and size of container all play into the equation but I get pretty ok results. I think been able to change the speed seems to be the key so you can dial it in you can see the pins dancing when you get it right I have another vid of this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SvQnJ7IGCvA.html&ab_channel=Josef1. I was thinking of gluing a funnel into the middle of the bowl to push everything into the stream of pins but not got round to that yet.
@@Josef1cnc Seen the slip speed of motors is lower than the theoretical speed I then think I should go towards 3000, also seen I might use the polisher for different purposes like small steel items like knife blanks and alike. A propper fequence regulator should then solve the issue of dialing down speed I guess. You might want to have a look at 3D printing for your proof of concept regarding the funnel concept. Take a known sized bucket and print an insert to try it out with. Besides a funneltype shape (which has an empty space in the centre), it might be worth looking into circular V groove which follows the path of the rotating magnets and optionally a circular wave shape to push the pins up and down along their path forcing them act more agitated. But ofcourse you can experiment with different shapes AND textures to get the pins moving around more. I couldn't find an example image quickly but if you have questions or arn't that familiar with 3D-printing please let me know and we might be able to help eachother out further.
first4magnets™ F205N-ZN-2 Magnet Expert® 20mm dia x 5mm thick x 5.2mm c/s Zinc Plated N42 Neodymium Magnet - 8.3kg Pull ( North ) ( Pack of 2 ) amzn.eu/d/iKRrbbO. Something like this you have to be able to swap the poles over
