tag:blogger.com,1999:blog-4429789698339059066.post6282730851008982375..comments2024-02-27T06:59:55.973-08:00Comments on Yuriy's Toys: Grizzly G0720 Motor Power Supply Repair - Part 1Yuriyhttp://www.blogger.com/profile/11394499166280606198noreply@blogger.comBlogger12125tag:blogger.com,1999:blog-4429789698339059066.post-69867671352357954672023-12-11T02:20:25.416-08:002023-12-11T02:20:25.416-08:00Yuri, please ignore this fool. You seem to be the ...Yuri, please ignore this fool. You seem to be the only person out there who has actually taken the time to explain anything about these Chinese electrical systems and I thank you for that. The original manufacturers didn't even bother! Perhaps "Anonymous" could point their amazing skills at the issue and actually help instead of being so utterly rude? <br />I'm currently rebuilding and repairing a drilling machine that contains the same driver board and your photo's alone have helped me beyond anything else. I salute you Sir.Roofletchhttps://www.blogger.com/profile/16655209532125571555noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-33075092516667202272021-08-10T01:54:57.993-07:002021-08-10T01:54:57.993-07:00stupid troll has no Idea but to criticize. Keep up...stupid troll has no Idea but to criticize. Keep up the good work YuriAnonymoushttps://www.blogger.com/profile/01926535870447064288noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-63227749039420203932021-04-01T21:08:20.637-07:002021-04-01T21:08:20.637-07:00Yuriy,
One thing that confuses me about Grizzly’s...Yuriy,<br /><br />One thing that confuses me about Grizzly’s wiring schematic is that they have the L1 terminal at the top and the N1 terminal as the second one in. The L1 terminal then connects to the top of the main circuit breaker terminal. But on the my controller board (and even in the photo in their manual) it shows the N1 terminal being at the end and the L1 terminal as the second one. I’m not sure which terminal connects to the top of the main circuit breaker terminal.<br /><br /><br />Thanks,<br />MarshallMarshallhttps://www.blogger.com/profile/01729709885350624766noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-47263518847363184392021-04-01T21:03:17.175-07:002021-04-01T21:03:17.175-07:00Yuriy,
I’m confused by a discrepancy between the ...Yuriy,<br /><br />I’m confused by a discrepancy between the wiring diagram and the actual board. The wiring diagram shows the L1 terminal being at the top which connects to the main terminal at the top of the circuit breaker. The N1 terminal is the 2nd one down. But on my board (and even the photo in the instruction manual) the N1 terminal is at the top and the L1 is the second one down. Which one is supposed to connect to the top main terminal on the circuit breaker?<br /><br />Marshallhttps://www.blogger.com/profile/01729709885350624766noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-25367678812293574382020-02-16T00:59:38.124-08:002020-02-16T00:59:38.124-08:00Anonymous doesn't recognise the intended audie...Anonymous doesn't recognise the intended audience. And is a dick.Uber-bayhttps://www.blogger.com/profile/02012562677760517423noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-48292263719665769032020-01-21T09:48:47.158-08:002020-01-21T09:48:47.158-08:00Great work Yuriy.
Thanks for sharing all this.
-br...Great work Yuriy.<br />Thanks for sharing all this.<br />-brino (from HM)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-70467603305910882532020-01-13T11:33:52.991-08:002020-01-13T11:33:52.991-08:00DWS, I posted this stuff to help other people that...DWS, I posted this stuff to help other people that run into this. You adding more info doesn't take anything away. This saved me the work of finding the videos.<br />Regards<br />YuriyYuriyhttps://www.blogger.com/profile/11394499166280606198noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-23843017311698411222020-01-13T11:22:41.332-08:002020-01-13T11:22:41.332-08:00Not to take away anything from Yuriy, but to add f...Not to take away anything from Yuriy, but to add for completeness, if anyone else has a mill or lathe go out and is investigating and repairing it, here are links to the additional videos I referred to above:<br />Quinn's the quintessential "amateur" machinist, in the true sense of the word. You can tell she loves it!<br />BlondiHacks "Mill Explosion and Repair" - Motor failure and replacement, with additional travails at https://www.youtube.com/watch?v=QsOt80ShiGA<br /><br />This one is great if you need to deal with a used motor replacement, or just to understand bigger AC motors. AvE's language is delightfully appalling! But his work is absolutely spot-on! <br />AvE "MAZAK MILL AUDIT - 9 wire dual voltage electric motor wiring" at https://www.youtube.com/watch?v=YnOlZpyAhDc<br /><br />DWShttps://www.blogger.com/profile/05153572222121575326noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-71927646860851001342020-01-13T09:32:00.814-08:002020-01-13T09:32:00.814-08:00Thank you for the feedback. Glad you found this us...Thank you for the feedback. Glad you found this useful.<br />So far the board seems to be working. I was able to tweak the encoder timing a bit by simply turning the housing a few degrees, which made the rotation more even (it was pretty "wobbly" before). I will be replacing the motor with a 3-phase inverter duty motor pretty soon. At this point I'm not too impressed with the BLDC controller (the motor is pretty good, but the controller seems to be put together by a hobbyist, not an EEE who knows how to do these things), plus I want to get wider RPM range. 1600RPM is pretty limiting for me since I use small end mills.Yuriyhttps://www.blogger.com/profile/11394499166280606198noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-73449406264265335972020-01-13T09:16:49.941-08:002020-01-13T09:16:49.941-08:00Thanks Yuri, I really enjoyed and learned a lot fr...Thanks Yuri, I really enjoyed and learned a lot from this article, and I've been a control systems engineer for almost 40 years now. <br />Interestingly, this weekend I also watched AvE's youtube video on replacing his mill motor, and also (especially!) BlondiHacks youtube video on troubleshooting and fixing her budget mill, which turned out (in her case) to be the motor. But in her case a series of interesting travails followed, centered around the issues she had by following customer service's advice and swapping out the control board... then the display... then the speed pot. Ugh!<br />I appreciated the steps and issues that all of you went through, and it will help my students seeing your thought processes and steps. <br />Thanks for being open and sharing!!!DWShttps://www.blogger.com/profile/05153572222121575326noreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-81132751187754296012020-01-09T16:44:28.036-08:002020-01-09T16:44:28.036-08:00Thanks Yuri, don't feed the troll..Thanks Yuri, don't feed the troll.. <br /><br />Teegeenoreply@blogger.comtag:blogger.com,1999:blog-4429789698339059066.post-71267613688631852272020-01-09T15:52:50.582-08:002020-01-09T15:52:50.582-08:00There are so many things wrong with this article t...There are so many things wrong with this article that I don't know where to begin. Why would you want to invest time and money into fixing a disposable china machine. For what you paid for it you could've gotten a good used Jhead Bridgeport. It wouldn't have the the gimmicky variable speed control that you don't need anyway. I see that you got yourself an expensive Fluke 87 and learned how to check resistance and voltage. Now you think you are an electrical engineer. Like they say, if you only know how to use a hammer, every problem looks like a nail. You don't test BNDT using an Ohmmeter. Unless you can trance the signal in-circuit, you need to remove the part and test on a transistor tester. To test the encoder you need to hook it up to the scope and spin the motor at operating RPM and not measure the voltage. Gosh! you don't even know the difference between a stepper motor and BLDC motor. I laughed so hard when you suggested to short the leads on the motor together and spin it. That is the dumbest thing I've read in a long time. You are a completely joke. Do you even know how to read a schematic? Guess not or you would not be aimlessly poking around the board with a voltmeter. Here is an idea for you. Sell the fancy Fluke multimeter to someone who actually knows how to use it and spend that money to buy yourself a clue.Anonymousnoreply@blogger.com