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: Is this cheap type of VFD worth buying?|
Feeding an old motor from a new inverter can give an awfull smell.
I tried it two times before buying a new motor.
|Thread: Metric threading on Imp Lathe|
80 divided by 63 makes 1,26984 that is very close to the magic 127/100.
Pitch will be1,4998mm not 1,477 me think
Another almost but not cigar combination is 47 divided by 37 that gives 1,2702 or again an error of less than hobby measurable
|Thread: conversion on Myford 254|
There is a manual here from february 2018 translated from german.
The newest is only in German but pictures needs no words
|Thread: Boxford AUD needing a new Motor|
An WM250 has replaced an old Boxford.
Drivetrain is a HuanYang one to three phase 220V ca 50£
Taperlock pulley ca 20£
Powertwist belt ca 20£
1,1kW fourpole three phase motor ca 100 £.
An older Youtube before powertwist.
Edited By Niels Abildgaard on 30/05/2019 11:32:39
|Thread: Lathe improvements?|
It is a living room for a widower.
Only assembly of parts that are machined in the entry room uniting outher world ,toilet and kitchen.
Clean floor-tiles and 22 degree year round from green district heating (they claim)
Edited By Niels Abildgaard on 23/05/2019 19:45:35
Edited By Niels Abildgaard on 23/05/2019 19:50:13
The new spindle is in and turns freely.
Two new 50 and 100 teeth gears, that can go instead of present 40 on spindle and 80 on leadscrew, has arrived and are nice.
I would have preferred new gears in Delrin from You_ Engraving (Ebay) but I have lost his address and Ebay is not very helpfull establishing direct contact.
It has sent me thinking and the other possibillity is to have synchro belt from spindle to a lower idler that also has the existing 40 gear wheel and then makes further changes unnessecary.
Advice sougth please because there is a small devil that tells me to put electric leadscrew on instead of all this medival clockwork technology .
Edited By Niels Abildgaard on 23/05/2019 18:51:48
Edited By Niels Abildgaard on 23/05/2019 18:53:20
Have turned a new spindle partly and wait for parts.
One more bearing 32908 62 40 15 mm and a 50 and a 100 teeth wheels from
The original spindle gear is 40 teeth module one and leadscrew 80 teeth.
Edited By Niels Abildgaard on 16/05/2019 15:22:52
Edited By Niels Abildgaard on 16/05/2019 15:24:11
Edited By Niels Abildgaard on 16/05/2019 15:39:38
|Thread: Chinese Lathes|
My two inexpensive Chinese lathes have been excellent for their price, although I'm only making clocks....If the Chinese makers and their importers are watching this thread then can I make a plea that they think about the difference in size between Chinese and European fingers!.......Changing chucks (on the small lathes) spoils an otherwise happy day due to getting your fingers onto the bastard nuts without dropping them down the back of the machine, or worse..... I know that the bolted chuck methd is cheap to make and safe etc but it would not be too difficult to design the tin around the headstocks to allow finger space.
My first operation on a Weiss Machinery 250 lathe was to turn 4 mm away on the backside of flange.
I have a very precise and invaluable MC3 testbar and the misserable deed made no difference before or after .
Runout on far end less or equal to 0.005mm.
Chuck changing is less than 150 seconds
Edited By Niels Abildgaard on 09/05/2019 16:53:57
I also did it on a 210 size that I threw out
Edited By Niels Abildgaard on 09/05/2019 16:58:56
Edited By Niels Abildgaard on 09/05/2019 16:59:49
Edited By Niels Abildgaard on 09/05/2019 17:01:26
Edited By Niels Abildgaard on 09/05/2019 17:02:39
|Thread: Running M type motor underneath and what do I actually have?.|
If space is a consideration ,putting motor on top is working quite well.
Edited By Niels Abildgaard on 22/04/2019 21:17:11
|Thread: Lathe improvements?|
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
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
Am getting older so it is some kind of race.
Edited By Niels Abildgaard on 18/04/2019 18:58:06
I gave a very well performing Boxford away and got a new and younger WM 250 six speed lathe.
It has got a VFD and a stone to sit on.Plus a much better compound slide arrangement.
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.
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.
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
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?|
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?|
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.
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|
My WeissMachinery 250 is almost the same and I am modifing/improving it
|Thread: ER25 or MT2 Collets|
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?|
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.
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|
The combination of a HuanYang and a WM250 lathe
from HBM in Holland is a winner I think
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 ?|
Homeground carbide in homemade holder:
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