Working on my Einhell MTB 3000 mini lathe

[UlicniTrkac]

Well,
when I started almost a year ago, it looked like this





then I began with hole lot of mods....






had made a new 100 mm spindle, extended a bit




had problemns with removing old pulley

and managed to burn  the board, but had it repaired


did a mod for easy angle setting - made a carrier of hardened steel, cause the old one got nicked quite quickly



and made these ones from bronze, for easy sliding

and drilled a hole for carriage stop, that works part underneath isnt attached on pic



slide is now on acme thread



throug these ones with bearings


metal pulley with 14 cogs


new tailstock from Amadeal

and milling and ball turning attachments from LMS


qctp is also from Amadeal (sold it in the meantime and ordered one from LMS)


new "wheels"




then, I have managed to brake the plastic gears inside headstock, replacement ones - metal of course, came in today, from Amadeal. With 550 W motor Didnt make the pics yet, I will do it in next few days. Along with new QCTP from LMS, metal change gears are on route too. So every plastic piece will be changed

On this new motor, I will fit a 12 cogs metal pulley. I think I will have a lot of torque. I just hope that my KBLC240D will work with it without problems. And also, I have to figure out how to fit the motor there, because there isnt enough room to do it.

[Sid_Vicious]

Looking real good.

[Brass_Machine]

1st. Welcome to the collective :Borg:

Looks like some good modding there. I just started modding my mini lathe too. Keep us in the loop on the motor and the controller.

Eric

[UlicniTrkac]

attached the motor today. it works nicely. also, metal gears are fitted inside head casting (no pic lol)

but motor will hardly fit in   its lower end is resting on the inside of the casting.

the metal pulley with 12 cogs is fitted on motor. my metal gear that holds the other end of the belt isn't finished yet (I hope to get it in next few days).
I will have to make some sort of adapter, to move existing mounting holes about 5 mm to the right. I will mill a metal block tomorrow, that I will fit to the existing holes, and below (or above them) I will make new mounting holes that are offset from existing ones.
I hope that I wont have problems with lining up the belt and both pulleys (they might miss align for 2 or 3 mm vertically)

[andyf]

Hi Stefan,

I'm sure you will be able to fix it so the pulleys line up. I think the motor mounting on Sieg minilathes allows the motor position to be adjusted, by loosening a bolt at one end of a shaft on the mounting and tightening a bolt on the other end, but I believe Einhell lathes are made by Real Bull so they may be different.

Andy

[UlicniTrkac]

well I've been busy today.
Here's what I came up with. Its not finished yet (I still await that belt gear in metal so I can set it up)

[UlicniTrkac]

I'm just wondering should I change the 6A fuse for a stronger or a weaker one, for this motor?

[Bluechip]

 
IIRC the KB controller puts out some 180V so with a 550W motor that means a nominal 3A or so.
 
That's not suitable for a motor application, if your 6A is an 'Instant' fuse it seems about right.
 
I would not go any higher. If it tends to blow I would look at a 4 or 5A TD or 'Slo-Blow' before I used any larger rated fuse in it.
 
Motor applications usually have a 'Slo-Blow' fuse in my experience.
 
Dave 
 
 

[andyf]

The motor on my lathe is 450W, and I use 3.15A time delay fuses. 3.15A might be a bit low, and I blow a fuse every three or four months (usually when I'm parting off ), but the fuses are £3 for 10 at an (expensive) local store, and it is a lot quicker and easier to replace one than to fix a fried control board.

Andy

[UlicniTrkac]

thanks fellas, I'll just leave stock 6 A quick fuse then.

[Stilldrillin]

Hi Stefan.
I have a similar set up to you, as you know...... And use a 5a fuse, with no problems ! 

You will certainly notice the increase in pulling power, when you have this all assembled! 

David D

[Bluechip]

The motor on my lathe is 450W, and I use 3.15A time delay fuses. 3.15A might be a bit low, and I blow a fuse every three or four months (usually when I'm parting off ), but the fuses are £3 for 10 at an (expensive) local store, and it is a lot quicker and easier to replace one than to fix a fried control board.

Andy

That's what I would do for a motor load.
 
As a rough 'rule of thumb' work out nominal amperage, add 30%, and call it a 'Slo-Blo'.
 
In your case
 
450W / 180V = 2.5A nominal.
 
Multiply by 1.3 = 3.25A Slo-Blo.
 
You ain't a mile away at 3.15A... 
 
Dave BC