By continuing to use this site, you agree to our use of cookies. Find out more

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: Lathe improvements?
19/04/2019 05:41:52
Posted by Neil Wyatt on 18/04/2019 19:32:37:

Look on the bright side Niels, you have no shortage of headstones...

Neil

Good guess.

Plan is to have Diabas+WM180 slowly revolving (Solar array of course) on my grave.

Text on stone:

Remember to lube .

Edited By Niels Abildgaard on 19/04/2019 05:42:32

18/04/2019 18:54:12

The dog demanded walking so I did not finish within the edit allowed window.

Why bother with new chineese when world is full of old My- and Boxfords?

First thing i try is putting my MC3 testbar in spindle as shown on the first (Boxford) picture

On the WM 250 on stone there is no runout close to headstock on my Swiss Tesatast.

On the bar far end it has moved 0.005 mm out and oscilates plus minus 0.005mm.

The WM180 straigth out of box and no stone is still zero close to headstock and 0.01 plus minus 0.008.

The 0.01mm stationary error can easily be shimmed away when it meets its stone.

Concavity on the WM250 facing two 100mm disc are around 0.01mm each.

The WM180 is around double but still concave.

The bedways are definately harder than on Boxfords.

The WM250 was 850€ from Holland and the 180 was in Denmark ca 1000€.

Both came with three and four jaw,faceplate and two steadies.

I will use the 250 to make a new bigger spindle for the 180

assem1.jpg

Am getting older so it is some kind of race.

Edited By Niels Abildgaard on 18/04/2019 18:58:06

18/04/2019 17:19:15

I gave a very well performing Boxford away and got a new and younger WM 250 six speed lathe.

RockFord

LatheCrane

 

 

It has got a VFD and a stone to sit on.Plus a much better compound slide arrangement.

wp_20190418_003[1].jpg

A M16 Unbrako 12.9 bolt has had its head reduced 2mm in diameter and surface is at least as good as the Boxford can do.

wp_20190418_005[1].jpg

It has a spindle with 21mm hole and MC3.

I want to have 27mm hole and ER40 instead.

I have slowly to admit that parts are getting to heavy.

A WM 180 has entered my house and will be put on stone and get a VFD plus AC motor.

 

wp_20190409_003[1].jpg

It is intended to make it turn better than Boxfor or WM250.

Stripped for most parts You can se that the bed-headstock has rigidity as a wet newspaper

wp_20190418_004[1].jpg

Edited By Niels Abildgaard on 18/04/2019 17:21:04

Edited By Niels Abildgaard on 18/04/2019 17:23:41

Edited By Niels Abildgaard on 18/04/2019 17:26:28

Thread: Does a 1600rpm bantam have a single v belt?
15/04/2019 06:29:13
I got an old but unused 2hp cast iron Brook Crompton for a really good price).

I found two old motors and they smellt very bad being VFD-ed.

I then bought a new and total happines.

How old is the motor?

Thread: seals for mini lathe tapered roller bearings?
01/04/2019 17:49:33

A Boxford headstock drawing.

There was about 0.05mm clearance between staionary headstock parts and rotating spindle parts.

It was part-filled with grease from factory and sold as Sealed and Greased for life needing no further attention.

Mine worked fine for ten years on two teaspoonfull of grease.

The drawing shows a very early model.There is two things that look like contacting felt rings.

There was neither felt rings or cut outs for them in my lathe.

 

Boxford A spindel.jpg

Edited By Niels Abildgaard on 01/04/2019 17:54:17

Edited By Niels Abildgaard on 01/04/2019 17:58:41

Thread: New Lathe
31/03/2019 14:37:42

Posted by KenJ on 23/03/2019 07:59:52:

My WM240B arrived and is now set up, cleaned and checked; all seems ok. The Warco process was faultless, ordered and arrived within one week.

Kenneth

Good choice.

My WeissMachinery 250 is almost the same and I am modifing/improving it

VFD plus WM250

Thread: ER25 or MT2 Collets
18/03/2019 10:33:31

If the lathe and mill spindle-noses were changed from Morse to ER everything will be better I think.

MT3 machined for ER32 and ER25 for former MT2s?

Same change for Milling machine .

Thread: HY Series (Huanyang) VFDs, setting maximum speed?
17/03/2019 14:00:07

Thank You Andrew for explanation that made me understand the chinese/english manual better.

Programme step 009 sets a voltage and 006 a frequenzy.

At this point the voltage/frquenzy curve can can be made to have a kink(both directions ) or none.

17/03/2019 11:10:43
Posted by Ian P on 13/02/2015 19:24:19:

I only used the lathe a couple of times before I put a switch in the fan lead so I could turn it off when the lathe was not running. I have since fitted an electronic thermostat so the fan only come on when the VFD heatsink gets hot. I have set it 40 degrees and so far the fan has come on only once!

I use the VFD over an output frequency range of 5 to 150Hz and experience no motor overheating eat all. At low frequency the motor torque is low so its never going to be doing much heat generating work, at higher frequencies the fan is turning faster so the motor looks after itself.

Ian P

The low torque/low Herz problem can be eased by upping PD009.

I tried it first with 5V and could stop the 125mm chuck with one hand when at 5 Hz.

It has been set to 22 V and I cannot stop chuck with two hands.

The translated manual uses more words than elsewhere to warn agaist being to greedy and put in a to high value here.Can someone here explain what is at take?

Thread: VFD Choice
17/03/2019 10:32:27

The combination of a HuanYang and a WM250 lathe

https://www.hbm-machines.com/producten/metaalbewerking/metaaldraaibanken/metaaldraaibankensub/hbm-250-profi-metaaldraaibank

from HBM in Holland is a winner I think

**LINK**

To make 90 Hz max I have had to program PD 072 to 180Hz.

What is the joke?

Edited By Niels Abildgaard on 17/03/2019 10:33:43

Edited By Niels Abildgaard on 17/03/2019 10:57:39

Thread: Tangential tools ?
13/03/2019 08:51:29

Homeground carbide in homemade holder:

Tangential Carbide

Thread: Lathe screwcutting
11/03/2019 21:32:56
Posted by JasonB on 11/03/2019 20:45:31:

Niels, this video shows the cone arrangement and problems with it.

Jason,Thank You for link.

It is as I thougth but it is nice to see it clearly.

Material looks cast Iron to me and I am using mild steel,and ca 18 mm thick

I have a piece of 16MnCr5 ready.

I do not use QCTP with tool overhang either so I will make one more for a friend.

11/03/2019 08:14:50
Posted by JasonB on 07/03/2019 16:17:13:

Edited By JasonB on 07/03/2019 16:51:55

Thats an awfull nice picture of a very well engineered slide system.

Been there myself

Much better

 

Found this from Boxford

 

From Boxford Spares

 

It does not show the   Boxford locking screw/cone very well.Does someone have a picture of underside of compound slide base with integral cone please?

Edited By Niels Abildgaard on 11/03/2019 08:20:32

Edited By Niels Abildgaard on 11/03/2019 08:21:14

Edited By Niels Abildgaard on 11/03/2019 08:22:37

Thread: BR 55 or G8.1 5" gauge plans
07/03/2019 19:49:40
Posted by murkmannz on 06/03/2019 22:49:34:

Thanks Phil, yes it is KPEV, I like the one you posted but I guess I am not sure if it is appropriate to paint the number version loco in the lined scheme?

thanks

Ian

Another 55 62 engine that ran in Oldenburg

Compound locomotive from oldenburg

Thread: Denford Viceroy 280 motor and inverter
18/02/2019 06:31:34

It was an A section Powertwist belt..

It could drill 20mm holes in mild steel from14mm.

Going from 12 to 20 was a marginal affair.

Belt tension was not high as I liked the slipping when I made something stupid.

I have stalled a 4 pole 0.75kW motor once.The white video one.

Powertwist A belts cannot go round smaller than 60mm pulleys.

Do You have a drawing of the drive system?

My Boxford back-gear system was only used for unscrewing chucks,faceplate etc.

When  starting with both backgear and direct drive engaged, belt slip was a benefit.

 

Edited By Niels Abildgaard on 18/02/2019 06:40:30

17/02/2019 10:27:00

My former Boxford was driven with a Powertwist belt from a 60mm pulley on AC motorshaft unto the big 90 mm pulley on lathe spindle.

RockFord

A 2.5kW VFD made belt changing superfluous.

Noise was next to none from 60 to 1400 rpm.

**LINK**

Best motorsize was 6 pole 1.1kW

Thread: lathe wanted
11/02/2019 15:18:18

I have had both a A model and an AUD and think the A is the one to look for.

Sooner or later You will VFD the thing and it is easier on the A where the spindle v -belt disc is bigger .More torque

Thread: Noise from lathe drive
02/02/2019 12:59:49
Posted by JasonB on 02/02/2019 11:23:25:

Is noise your only critera for choosing between 2 pole and 4 pole?

As you want to run down to 60rpm I would be more interested in which of the two will give the better torque and which will be happier running at a very slow speed with regards to cooling as well as power, long running at 150rpm motor speed won't be ideal.

For a couple of years my Boxford had a 1.1kW 6 pole and I did a lot of single point threading at three Hz and with 2 to 3 reduction.

.Motor never smelled bad.

Single point threading uses very little power.

Many modern motors have a termistor inside that can inform inverter.

Wishlist to inverter:

single 230 feed and three times 230 out 0.75kW

Act on termistor signal from motor

Act on inverter fan so that it only run when inverter is getting hot,

Understandable manual

Aproximate .5meter between inverter and buttons

 

Can that be had within say 150£ ?

Edited By Niels Abildgaard on 02/02/2019 13:00:48

Thread: Tinhat warrior trademark.
01/02/2019 17:44:47

Hello Nigel

I have given away worlds best turning Boxford to a friend ,thrown a lousy Boxford out and given two chinese lathes,WM280 and a WM210 away and mistreat a WM250 for the moment.

Next time I fall in love with another lathe I think we make swap .A Lathe for a MZ?

That dirt collection problem in ETZ frame is new to me and I sold it many years ago.

It reminds me of my four Austin Maxis that all died from rust due to dirt in the front transverse bridge.

Front wheel threw mud into a corner.

Thread: Noise from lathe drive
01/02/2019 16:37:59
Posted by Howard Lewis on 01/02/2019 16:15:54:

The bench on which you mount your lathe needs to be rigid, if only from the point of view of dimensional stability.

I would not expect to get consistent work from a lathe on a flimsy support.

 

 

Hello Howard

 

All my lathes are mounted on a piece of granite or diabas(dolerit).

The black tube is a piece 600/640mm PEHD tube.

Motor makes the noise and I want 60 to 1200 rpm by turning a potentiometer anyway.

My wish for advise was between two pole and four.

I try four first.

 

Conversation in livng room.

Edited By Niels Abildgaard on 01/02/2019 16:40:59

Edited By Niels Abildgaard on 01/02/2019 16:42:31

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Support Our Partners
Eccentric Engineering
Warco
ChesterUK
Ausee.com.au
Eccentric July 5 2018
TRANSWAVE Converters
emcomachinetools
Allendale Electronics
Sarik
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest