FWIW, what the magnetic dust was sticking to is called the stator of the motor. It looks like it's a brushless DC permanent magnet motor.

@ReLoadersBench

6 ай бұрын

Good to know...constantly learning (and that's a good thing!). Thanks.

@dirk143

Ай бұрын

Not in this case, its much to small. This is a probably Feedback unit that gives the conroller the rpm info. Not all 750w Vevor lathe have it. It may improve the rpm stability under load. Without it You can adjust with the turning knob when the rpm goes down. The lathe without usually turn faster then 2500 without load(2650)

Keep up the good videos!

If you don't have one already, pick up a 4-jaw independent chuck for it. You can dial in pretty close to zero runout using one.

@ReLoadersBench

6 ай бұрын

I received a 4-jaw chuck (not independent) for Christmas ;-) I have a LONG list of "to buy" and now that I picked up a mini mill, that list is only growing.

@darkwinter7395

6 ай бұрын

@@ReLoadersBench Yeah - you're gonna want an independent 4-jaw. It's SOOOO much more versatile than a scroll chuck.

@ReLoadersBench

6 ай бұрын

@@darkwinter7395 - Definitely on the list!

Pleased to see that you got a result. I was thinking that you were another one of these guys with the insane preload on the headstock bearings that cooks something on the first heavy use. Question, is it fair to assume that Vevor know you have a youtube channel? Asking because I wonder if the average Joe Schmo could expect the same level of cooperation in the event of problems.

@ReLoadersBench

6 ай бұрын

Yeah, I'm not Cutting Edge Engineering Australia (that guy has AMAZING skills - and serious equipment) or not even a mini version! The whole YT channel thing constantly surprises me. I watch videos/channels with both huge (millions) and small (hundreds to few thousand) subscribers and they start with "VEVOR sent me..." or "VEVOR wanted me to review..." So I can understand why a vendor would go to a channel with a huge base, but, to me, I scratch my head on why they would provide free/eval gear on a small channel. My channel is VERY small, but I posted my experience for 2 reasons. First, I couldn't find a mini lathe spindle removal video (they were all big machine industrial type vids) to learn from. Second, VEVOR wanted an initial video of what was wrong and after I made that I decided to document on YT to show them (and viewers) my progress as well as frustrations. Not so much "I have a channel and you need to support me", but I did lean on the 12 month warranty they promote in my emails to them. My expectation was their warranty would get me running again. How that would happen was the big unknown. Now that I've completed this repair, I don't think there is anything else on this machine I can't replace with parts from China if anything else fails. These machines are not built to last (depending on usage) IMO. Can't remember where I read it, but the "life expectancy" of this lathe is 3 years. Again, based on cost, this is reasonable IMO.

@MethaneHurricane

5 ай бұрын

@ReLoadersBench haha yes I saw that life expectancy thing. It's on their website and probably gets cut and pasted to a lot of places from there. I just assumed it was a translation error since not all lathes have it, and there is no shortage of errors and contradictions elsewhere on the lathe pages. But it's a bit scary if there was no mistake and they mean it literally. But the freebie thing is the reason I asked about their awareness of your channel. Like you I keep seeing freebies going out to youtubers left and right so I take that to mean that youtube is very important to vevor, and I wonder if a guy with no presence here would have the same warranty experience. There's really no way to tell of course, but maybe anyone who had a different experience will eventually find this video and chime in.

@ReLoadersBench

5 ай бұрын

@@MethaneHurricane - Yeah, the freebie thing always amazes me. I would hope VEVOR would honor their warranty the same for a non-YTer as for a big channel. But, they're not stupid, so if a really huge channel had an issue, I'm betting they'd get the A team for support/resolution to minimize negative brand name exposure. There are plenty of folks out there bashing VEVOR for whatever product, but especially their lathes. There is a REASON their products are priced SO attractively (just like Harbor Freight). I recently watched a guy do an unbox and demo of his lathe (same as mine) and he tried to come off like he knew what he was doing (got trashed in the comments) and he couldn't recommend the lathe with one reason being the RPM wouldn't go to zero. The web site, Amazon, manual, etc. all state the RPM spectrum on this lathe is 150-2500 (+/- 12% variance). Hard to take someone serious when they are clueless. The difference on my channel is I AM CLUELESS and my videos are about my learning process/experience as I don't pretend to know what I'm doing or an expert at what I share. All hobbies of interest to me and I enjoy sharing my learning process.

What a frustrating experience. I’m glad it’s operational again. The intimacy you were forced to experience with its innards will no doubt prove beneficial, but hopefully this is the last time you’ll have to clean out magnet fragments.

@ReLoadersBench

6 ай бұрын

Definitely a learning experience! I now know what to do if/when this happens again.

Nice video. I stil do not know why the motor was broken .. Too high temperature? Glue melts and then magnet flipped to the stator? Or just bad materials or design? Magnetic dust? If a splinter is left. You pull it in immediately when you put new magnets in.. lowest speed 130rpm looks high to me and what about torque at that speed. And what is the temperature doing then. To me it looks that there is not so much thermal mass. (I own hbm 180 vario and no broken parts yet..)

@ReLoadersBench

5 ай бұрын

Thanks. No idea what happened on the motor/spindle going kaput, as I was on another pass that I had been turning for 6-7 previous passes at the same speed/depth. Oh well, thank goodness for the warranty and finally getting it back online. My specific lathe has an RPM (in their documentation and on their web site) of 150-2500 +/- 12%. Doesn't go to 0 unless I turn it off! I've never measured the temp on cutting, but might do that next time.

Well that all seems to have gone quite well. I must admit at first I thought the whole thing was wrecked when I saw the condition of the motor stator inside the headstock. Hopefully all the particles of the fractured magnet have been removed so that none of them find their way back between the stator and rotating magnet to cause more carnage, it must have been tricky to ensure they are all removed. The spindle is really just as straightforward to remove as one on a mini lathe that uses a separate motor, pulling the spindle back in using a length of threaded rod is probably a bit kinder on the front bearing races and balls than hammering it in, although I bet the factory just install them all with a hammer anyway. I would run the lathe with the gear train disengaged for a while, so that you can hear the rotating spindle more clearly without the racket from the gears. Anyway, glad you have it sorted and the machine is back in action, if you ever get yourself a milling machine then maybe choose one with a separate motor just to make life a little easier and less expensive in the long run. I'm just waiting for the postman to deliver my new mini lathe spindle.

@ReLoadersBench

6 ай бұрын

Hopefully your spindle is delivered to the correct address. I had to hunt mine down a neighbor was "holding" (they had it since the previous day...really?)

@lathejack

6 ай бұрын

@@ReLoadersBench Yes I saw you mention the missing new spindle in one of your other video's. What an odd and rather dodgy thing for your neighbour to do, I've had several items wrongly delivered to me and have always taken them to the correct address as soon as possible Regarding your lathe spindle, did you notice how the magnet is attached to the spindle? Is it bonded or even keyed in any way? The thin magnet looks quite fragile, and all the motor torque and load from cutting forces are transmitted through the joint between the magnet and spindle, so it's not too surprising that the magnets might have a habit of failing sometimes. Didn't realise you already got yourself a mini mill, can we have a look at it?

@ReLoadersBench

6 ай бұрын

@@lathejack - I have always immediately delivered any packages that were incorrectly dropped at my house, but apparently times (and neighbors) have changed. The new spindle looked as though it had some residue (glue?) in addition to a thin copper ribbon (that I didn't see or any remnants of) wrapped around the thin magnets. I also noticed in the video VEVOR sent the spindle the tech popped out didn't have the copper ribbon wrapper that my replacement has. We'll see how well/long the new spindle lasts. I still believe the "value" of this lathe is worth the cost and is my "learning lathe". I have begun making mini mill videos (unboxing, stand set up, mobile base, accessories, etc.) but taking that VERY slow and will start publishing soon.

He was not using wood that was a brass.Cylinder. You could see where it was mushroom on the ends from hitting things

The guy in the vid was using a nice sized drift punch. Granted it was just struck by hand but still. Way for force and weight compared to tapping it with a wood block.

@ReLoadersBench

5 ай бұрын

No disagreement, but had to get creative and work with what I had on hand.

The technician was not using a piece of wood. That was a chunk of copper, and may have been lead-filled. Much heaver, but still soft.

@ReLoadersBench

6 ай бұрын

When I re-watched their video I notice it wasn't a wooden dowel, but he still (even lead filled) wasn't whacking the spindle too hard as that machine looked like it was not quite fully built, but enough to demonstrate to me the process, which, given my knowledge state was helpful.

@darkwinter7395

6 ай бұрын

@@ReLoadersBench Yeah - I think the front bearing was not fully pressed into place.

I believe they were using a piece of brass to knock out the spindle in the video not wood

@ReLoadersBench

6 ай бұрын

After subsequent viewing I realized it was not a wooden dowel as it looked on my phone watching the video at first.

@uncledanny7

6 ай бұрын

@@ReLoadersBench how does the vevor lathe stack up against the harbor freight mini lathe. I am looking at getting me one and I like the vevor but with harbor freight being in basically every town around me if something happens like you had go wrong it’s easy to just go to a store and swap it out

@ReLoadersBench

6 ай бұрын

@@uncledanny7 - the last time I was in HF (after purchasing my VEVOR) and feeling the quality/build/parts of the one they had on display (also realizing everyone and their brother has played with it at some point) I'm glad I went with the VEVOR personally. Nothing against HF and I'm a HF fan, but that's my perspective. YMMV.

Sound Track for this video is Michael Jackson, “ beat it just beat it “

he was using a brass hammer.

@ReLoadersBench

5 ай бұрын

After re-watching their video on a larger (iphone originally) it was clear it wasn't a wooden dowel.