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Adoom's 1956 Meuser Lathe(Big German)


Adoom

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  • 1 month later...

The replacement china sight glasses finally arrived.

When I drained the oil out of the carriage, it didn't drain very well. I found that there was a thick layer of watery oily filth sludge in the bottom. So I unbolted the base plate to clean it out. Fortunately it cleaned up quite well. I also discovered that there was a broken spring. It had rusted at one end because it was under the sludge. I replaced the spring and its retaining screw.

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Tonight I tried to flush out the feed screw gearbox. I discovered it was pretty filthy too. So I moved all the levers to the left and removed the front plate.

There's a couple of gears in there....

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And then after cleaning.20191218_205010.thumb.jpg.db2160b56c8a70949beb395e3181d26d.jpg

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There was a paper gasket. I'm not sure if I want to try make a new one, or just use silicone since it's probably not going to be removed again for many years.

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See my sight glasses....

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I also got an Aloris style wedge type tool post from EBay USA. It came with 7 holders. I thought it was a lot of money.... then shipping and unspecified "duty and taxes" got added, which doubled the price. :shock:

So I'd been trying to think of an excuse to buy a 3HP motor to upgrade the 2.2HP motor.

The 2.2HP had a noisy centrifugal switch.... The 3HP motor arrived this afternoon. After removing the 2.2 and finding it really hot, I realised the centrifugal switch was stuck on.... so the starting capacitor was always connected.

The 3HP is wired up now, it's much quieter. It was getting late...I still need to align the pulley and I want to see if I can find matching belts as they are slightly different lengths.    

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Motor arrived already!

Unfortunately, the packaging(probably china original) was insufficient and there is a big dent in the fan shroud and in the wiring box. But it's just cosmetic, so I CBF doing anything about it.

I've installed the motor.

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And I've installed the 15Amp overcurrent switch that came with the first one I blew up. The motor is supposed to draw 13.5Amps.

I mounted it to the main switch so it was easy to get to.

I also put in some cable strain relief using p-clips.

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The overcurrent switch works too.... Turns out it draws too much when it tries to spin up to 800RPM, but it will do 528RPM just fine. I did a test cut on some 50mm round at 528RPM, 2mm depth of cut and that was fine.

I might be able to get it up to 800RPM if I cut the power, reset the over current switch, then power on again before the chuck slows down too much.... maybe. Going by the theory that it's drawing a shit ton of current just to accelerate all that weight.

 

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The speeds I get are ~double what it says here because the original motor would have been 1400rpm and I'm using a 2800rpm motor to make it go faster.

But if the fastest I can run with the 3HP motor is 528RPM.... It would have been better to use a 1400rpm motor and have more torque at lower speeds.

Le sigh....

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On 02/11/2019 at 18:32, Adoom said:

So the 2.2hp motor I want to try put on it has a 24mm shaft. The dual belt pulley that needs to go on it is for a 28mm shaft. I will try make a sleeve to make it fit. I'll also have to find a taller key.

You'll need a lathe to do that....

 

 

But yeah- wow. Fuck this is lovely. I like our lathe but a bigger lathe would be mighty handy!

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  • 5 months later...

Soooo I finally found a big boy motor that wasn't shitloads of money.

5.5KW Oh yeh!

It's quite a bit bigger than the 2.2KW. It juuuust fits in the motor house, I have to put it on its side to get it through the door.

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I've got a 7.5KW VFD on the way. Which was 1.5 times as much as I paid for the motor.

To run the VFD I had to get a 32Amp circuit installed in the garage, it will draw ~23 Amps. Fortunately I found a used outlet with a plug for fuck all. But the 6mm cable and conduit cost as much as the motor did. To save some money I pulled the cable and ran the conduit. But the electrician was almost as much again as the motor was.

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Hey @Muncie. What does this lever do? It's got a cam on the end that operates a couple of switches. I could probably use them as external switches on the VFD.

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Just now, Muncie said:

Forward and reverse, one i use to use also had the standard switch up top as well.

Oh, neat. So it doesn't do anything mechanical, it's just a giant lever for an electric switch.

So I can wire this into the VFD for my forward/reverse.

 

Cheers.

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