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Member postings for Niels Abildgaard

Here is a list of all the postings Niels Abildgaard has made in our forums. Click on a thread name to jump to the thread.

Thread: Inverter reset?
12/10/2019 15:30:30
Posted by Mike Poole on 12/10/2019 14:12:37:

It’s possible parameter 50 set to 8 may define input X1 as a reset if that inverter is the same as the one I have just read about.

Mike

Thank You and he will try when familly servicing allows

Niels

12/10/2019 13:07:37

My son has taken custody of my modified Kaimac180 Lathe with inverter.

He has overloaded the inverter by trying to cut a thread and it shows error one that means overload.

How can he reset it?

It never happened in my home and the instruction manual is real shorthand.

On the other hand it was very easy to connect:

Connect the wires ,put power on and here we go.

All for 50£

Cast iron faceplate death of a Dream.wp_20190731_006[1].jpg

Thread: Lathe improvements?
03/10/2019 17:59:00
Posted by Howard Lewis on 03/10/2019 16:15:24:

Niels,

You work is awesome. Your machine now bears NO relationship to what arrived on your doorstep.

You have made a very good silk purse, out of what may have been a sows ear..

Please accept my apologies if the English vernacular is strange to you!

Fantastic work, and a machine of which you can be really proud.

Howard

Hello Howard and thank You for kind evaluation.

I have had five chinese lathes through my hands within the last two years.

A 280 that was much to heavy to handle for an old man.

It is by a friend and I use it for cast iron,brass and big jobs.

A 250 that I use now

A 210 very cheap from Amazon that faced convex and given away

A 180 from Amazon that crashed down before entering my house and I got a full refund thanks to Amazon

A Kaimac 180 that is the main subject here and is at my son and is appreciated but can be improved (he claims).

I never measured the crasher 180 but the four others have been very,very good when tested for roundnes and cylindritis or watchmacall it.

Facing was very,very sligthly concave on all but the cheap 210 that was obscene convex.

They have all been better out of box than the My,Boxers I have known and it can have something to do with modern laser control and alingnment of the machine tools in China.

It will be worth watching if the Dijin factory can make a good run with the 38mm bore 210 lathe.

03/10/2019 09:04:32
Posted by Diogenes on 03/10/2019 08:36:02:

..that is cheap, BUT..

..yours is built with personally-selected components that have been hand-fitted to meet your own specifications for performance, durability, and accuracy that you know to be absolutely true, because you made it yourself.. ..you can't buy that for $700..

Thank You for support and my journey up til now has cost more than 700$ and have been enjoyable.

The original 210 spindle has a hole of 21mm and sits in two 30mm inner bearing rings.The holes in headstock is 62mm.

If we asume that the Dijin factory are boring 68mm headstock bearing seats, they can buy 32909 bearings and make spindles 45 mm outside.

Bending stifness of beams is a power four(Three?) function of diameter.

The standard 30/21 minilathe spindle stifness is 3*3*3*3-2.1*2.1*2.1*2.1 =62 something.

The new 45/38mm is (410-209=201) or more than three times more rigid

Why did Boxford not do something like it that?

02/10/2019 19:33:31

and this:

700$ ideal lathe?

Edited By Niels Abildgaard on 02/10/2019 19:38:42

02/10/2019 18:46:37

It has not been a cheap journey looking for the ultimate living room lathe, but quite fun.

Somehow I feelt a little fooled when I found this :

210 lathe 38mm spindle

Thread: Aero Fuel
29/09/2019 14:39:41
Posted by Danny M2Z on 29/09/2019 05:11:44:

Chas. Alcohol fuels contain less energy per litre than petroleum fuels so when maximum flight duration/range are involved petrol makes sense. Petrol Vs Alcohol Fuels

Alcohol fuels can liberate more energy in an engine with a suitable compression ratio though, hence why drag racers use alcohol and nitromethane as fuel ingredients.

* Danny *

A kg of petrol has an energy of ca 42MJ.

A kg of Ethanol has 30MJ

A kg of Methanol has 22MJ

A P51 on a Methanol Berlin trip would have no guns or amunition.

With Ethanol no amunition

Methanol dissolves aluminium..

Thread: M8x1 left hand tap.
19/09/2019 18:20:06

A continental source

MF8 LH

Thread: Lathe improvements?
23/08/2019 13:56:20

I have received a X-mas gift on my dorstep from Amazon four days after ordering.And paying 122 Euro

My 24mm testbar gives total run-out within one division (0.01mm) close to collet and plus minus 0.025(total 0.05) at cantilevered end 200mm away when put in 24 to 23 collet .In the 25-24 it hardly moves near collet and is plus minus 0.015 at free end.

Not bad

I have some spoiled carbide milling cutters and can test these close to collet.

The 12mm cutter in 13-12 collet is plus minus 0.03 but 13 is not a lucky number and in the proper 12-11 collet it is plus minus 0.01.

16mm cutter and10mm cutter run within one division in proper and proper plus one collets.

Very ,very satisfactory.

X-mas in August

Edited By Niels Abildgaard on 23/08/2019 13:57:40

17/08/2019 20:44:30

My son has fallen in love with the 180 lathe and I am preparing to send it out in the world.

wp_20190815_001[1].jpg

wp_20190817_002[1].jpg

It has got a 15mm steelplate between stone and headstock as support.I have also ordered a box with ER40 collets 3-26mm.

That means I will not be able by daily use to decide wich of the spindle variants

WM180 assembly

That is the one I have made

or the proposed is best.

I have  unscrewed 3jaw with backplate from present spindle and screwed the 4jaw plus backplate on and that is around 2 minutes.

I then put only backplate on again to simulate the new and maybe better spindle.

It takes a little more than three minutes to take the three long M6 bolts out ,place three-jaw in drawer

put four jaw on and secure with four long M6 screws.

The new configuration saves ca 20mm length for chucks but makes ER collets less accurate.

Can I have some advice before I write a letter to the Chineese embassy?

 

New spindle

Edited By Niels Abildgaard on 17/08/2019 20:56:20

Edited By Niels Abildgaard on 17/08/2019 21:04:09

Thread: 4 stroking a Merco 61...
14/08/2019 09:26:18

Why not try a worlds first:saml.jpg

Thread: Is your spindle bore large enough?
10/08/2019 17:52:09

The affordable chineese Weiss Machinery 180/210 lathes can maybe be improved at no great cost.

Lower part of picture shows situation as bougth.

That is

Morsecone 3 , 20mm bore, two 30 times 62 times 17mm conical roller bearings.

Upper part is a new spindle that

Can work with ER40 collets,  has 30 / 20mm bore and needs a new single 32908 conical bearing.

This can be changed by everyone with lathes and only nessecary modification is the front bearing inner grease seal that shall be opened to 40.05mm.

All drive and feed drive geartrain is not changed.

Just put on the new spindle.

 

Are we enough to make a demand at the chineese embassy and how much would we pay per new spindle without tears?

cheapskate.jpg

Edited By Niels Abildgaard on 10/08/2019 17:56:47

Edited By Niels Abildgaard on 10/08/2019 18:05:38

09/08/2019 18:28:41
Posted by JA on 09/08/2019 17:55:11:

Niels

How stiff is your headstock structure?

JA

Very weak until I connect the unsupported corner of bed to Stone.

Am still undecided how to do itwp_20190418_004[1].jpg

09/08/2019 16:50:49

Bending and torsional resistance or rigidity of spindles cannot be to high and is a power four thing of diameters.

Let us asume a Myford spindle is 30mm outside and 15 inside and let us calculate in centimeters.

Stiffness will be 3*3*3*3-1.5*1.5*1.5*1.5 eguals 81 minus 5(more or less) that is 76 something.

The same numbers for my proposed minilathe upgrade are 4cm outside and 3 cm inside gives 256 minus 81 is 175 in same units whatever they are.

To have the same softness as the myford my new spindle can have an hole diameter of 3.6cm or 36mm.

If the 62 mm bearing holes were 68mm ,spindle can be 45mm outside and hole almost 43mmNew spindle

Edited By Niels Abildgaard on 09/08/2019 16:58:13

Thread: Serious question, What is a Mini Lathe?
06/08/2019 10:35:16
Posted by Michael Gilligan on 06/08/2019 09:55:24:
Posted by Brian G on 06/08/2019 09:40:36:

Going back to the original question, given that a typical 7x Mini Lathe has a 20mm spindle bore (significantly bigger than an ML7 for example), an ER32 collet chuck would seem to me to be a perfect match and much more useful than my ER25 one, or for that matter the tiny hole in the centre of the 80mm 3-jaw chuck supplied with the lathe.

.

A very good point, Brian ... and with a little bit of design effort they could probably delete the Morse Taper and incorporate both an ER32 holder and a chuck flange on the spindle nose.

MichaelG.

All the 75 kg max mini have spindle bearings with 62 mm diameter.

A rejuvenation solution with 30mm bore/ER40 and extreme accuracy can look like this

If the spindle is casehardened and the 72mm recess comes as 72.05 it is no big deal to get it down to 72.00 with a sharp piece of carbide as first operation when exchanged.New spindle

Edited By Niels Abildgaard on 06/08/2019 10:38:34

Edited By Niels Abildgaard on 06/08/2019 10:40:09

Thread: Collet Chucks out of true
06/08/2019 06:27:23
Posted by Iain Downs on 05/08/2019 20:55:48:

I'm up for attempting to re-machine the ER32 taper in principle, but concerned it will end up scrap.

How I would approach this is as follows.

wind back the topslide, loosen the bolts holding it and set to exactly 8 degrees with my aldi angle gauge.(actually it will be 98 degrees as I will measure against the cross-slide edge).

You can save a lot of anger by drilling two holes in the topslide as shown on picture.

The outhermost hole is for the indexing of the the fourway.Not relevant

The other hole in topslide sits directly over one of the locking Unbrako screws with topslide in more or less normal working position..It has a mate not shown but symmetrical.

wp_20190722_005[1].jpg

Thread: Serious question, What is a Mini Lathe?
06/08/2019 06:09:23

Mass is a better classification

Micro less than 25 kg

Mini 25 75

Small 75 200 kg

Thread: Lathe improvements?
31/07/2019 19:24:50

A new backplate has been made for 3 and 4 chuck and big cast iron faceplate.

It meant to use the ER 40 thread (M50 1,5mm collett closing thread).

I dare not and will make a new spindle.

The three M6 screw finxing shown will be safer,just a little slower and saves lengths space.

 

New spindle

Cast iron faceplate death of a Dream.wp_20190731_006[1].jpg

Three jaw using the M50 1.5mm thread

 

 

Weiss 180 lathe with ER40

Edited By Niels Abildgaard on 31/07/2019 19:27:37

Thread: Warco WM250 Chuck maximum size
29/07/2019 08:14:03

From my Boxford days with screwed on chucks,faceplate etc it has become a habbit to take them away again as soon as job is finished.

Enterring the chineese bolt chuck country was a maddening expirience.

I have thinned the flanges of all the four blue lathes I have had.

Chuck change is now less than two minutes start to stop.

My advice will be to get the lovely non chinese 6 inch chuck and exchange the 5 inch chucks for 4 inch dittos.

4 inch chucks are so much easier to handle and put on spindle and will do 95% of the jobs.

Picture is a 5 inch taking off from my WM250 lathe.

Finger friendly

Edited By Niels Abildgaard on 29/07/2019 08:16:29

Thread: Lathe improvements?
22/07/2019 17:29:55

New love lathe

Serious Lathe for an old man

Harsh treatment for an Unbrako M16 12,9 bolt

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