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

Member postings for oldvelo

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

Thread: Black Ice
18/01/2016 21:09:54

Hi

Yes have seen "Black Ice" on on instance it was in Durham City around 1960 or before when steam locos where still in use and the "Flying Scotsman" came through the cutting at Nevilles Cross yes complete with discordant whistle screaming and sliding on tracks covered with "Black Ice" slid through the station and came to stand still on the embankment above Sidegate.

Was eventually assisted back to the platform by a Banker Engine.

Eric

Thread: Neat cutting oil. (recommendation)
07/01/2016 20:04:47

Hi

Off Topic but happy to run alongside

To apply cutting oil I use an oil can with a wide base and and very short in height and stick a "Pipe Cleaner" like thing from the local craft shop pushed down the spout with just a few bristles sticking out.

Gentle pressure on the lever and you have constantly rechargeable brush.

Push too hard and a big oily worm and a mess everywhere if you do not restrain it in the detachable spout by a small loop in the end.

No prizes for guessing how I learned this.

Eric

Thread: Blackgates Power hacksaw Rebuild
16/12/2015 19:50:58

Hi Graeme

An idler or a slipper pad on the non drive side of the chain will take care of a slack chain.

It is quite possible that the original chain had a half or cranked link fitted

Post a photo or two please for another power hacksa w nut

Eric


Thread: 3PH Speed control, what Pulley?
04/12/2015 20:46:27

Hi Vic

Forum members have pointed out the pros and cons of a variable speed drive.

As john indicates that a six pole motor will give better performance at it's lower rated speed of 950 rpm over a 2 pole 2850 rpm motor.

On any variable speed motor be it AC or DC an Auxiliary fan is needed if running on low speed.

A large computer fan run from a 12 volt DC plug pack is a good place to start.

As ega requests that more information will help and photos are invaluable.

My wood lathe is a Bitsa with a DC motor and variable speed controller .

Have a look at my Album "Lathe Clutch" it may be of help.

Eric


Thread: Help Wanted KBIC 240 AC to DC Motor Control
02/12/2015 22:51:36

Hi
Many thanks for the valuable information and help.
Replaced it with 0.047 μF @ 275 VAC. Capacitor and all works perfectly.

Thanks Again
Eric


30/11/2015 23:20:25

Hi
Can someone point me in the right direction or post a Wiring Diagram and Parts List for a
KBIC 240 AC to DC Motor Control.
It has a Capacitor across the L1 L2 terminals numbered C6 that has blown out the side and destroyed the label
What is the the values of this capacitor PLEASE

Eric


Thread: Speed Control of Single Phase Motors
23/11/2015 22:11:29
Posted by Rufus Roughcut on 23/11/2015 21:58:00:

hi gents

Any Idea how the washer manufacturers do it for the spin speeds 400, 600, 900, 1200, 1400, 1600 rpm from a single 240V motor

Rufus

Hi this is not a single phase cap start but a single to three phase controller and a three phase motor that does instant reverse for the agitator cycle.

This is the motor I am familiar with

http://www.directdrivemotors.com/history.cfm

Apology to Chris for the intrusion

Eric


 


 

Edited By oldvelo on 23/11/2015 22:16:24

Thread: Locomotion No. 1 - where to start ?
13/11/2015 17:49:55

Hi

Being a expat "Geordie" there are a couple of full size Locomotion No 1s are at "Beamish Museum" this is a full scale working replica.

The other is the original machine and Is at "Shildon Railway Museum" near Darlington.

Eric


Thread: Machine Saw
30/10/2015 18:23:47

Hi Alan

Great job of the power hacksaw for a home shop this is the probably best example of of a sturdy and well thought out machines I have seen for its rugged.simplicity

Having a fascination for power hacksaw from seeing one in operation as a kid in the dark ages. and seen many variations.

A couple of questions out of curiosity looking at the photo does the crank turn clockwise or anti clockwise.

Does it cut with teeth toward or away from the motor.

Eric


Thread: Power Hacksaw
24/09/2015 08:32:35

Followed this post you only have four choices clockwise anticlockwise teeth left teeth right.

Built a power hacksaw that cuts best on the pull stroke with the pivot above the centre line of the crank with the blade on the left and the crank turning anti clockwise.

It is hiding at https://www.youtube.com/results?search_query=wobbly+hacksaw

Conclusion is it all depends on the position of the pivot point location in relation to the crank and the overall design of the thousand of variations of a very simple machine

Eric


Thread: WM16 motor replacement
30/07/2015 22:34:03

Hi

Hind sight observation here

"Thanks for the replies,to be honest I've never been totally impressed with the motor it seemed to eat brushes".

This is a sure sign that all is not well with the armature windings on the motor for some time.

Sorry this will not help with your problem I am in not being critical just adding a pointer to any else who may be experiencing a motor that "Eats" brushes.

Eric

Thread: What is it about the Brits? From Jet engines to Warp drive.
30/07/2015 22:24:30

Hi

"Every morning before setting off I suck out the Hydrogen gas with a Hoover to prevent the gas evolved during charging from igniting from sparks while traveling."

Hydrogen Gas - Hoover - Commutator Sparking = Hydrogen Powered Jet Engine

Surely it was Frank Whittle sucking petrol fumes through a Hoover that the resulting rapid movement of the Hoover that inspired him to invent the jet engine.

Eric

Thread: Motor for machine
09/07/2015 22:54:39

Hi Lee

"Has anyone or do anyone run a Treadmill Motor on their machines.

from what I have read , these motors have good ajustable speed/power control with no loss of torque,

Are they easily converted for say powering a milling machine?"

Short answer YES

Lathe, Mill, Hacksaw, 2 Drill Presses all on DC motors using KB Electronics, Minarik, and Dart Controllers

That use 230 volts AC converted to 180 volts DC.

You need to know and understand how to wire them up and set them up to match the motor power.

Mistakes can be FATAL and permanent DEATH can be the consequences.

They can give excellent speed and torque control at high speeds say over 1/2 the motor RPM this falls off the available torque at low speeds.

A separate cooling fan ex computer 12 volt DC is desirable when using less than full motor speed.

I use an AMP Meter wired in on the DC motor leads For setting up and measuring the load when machining.

As for the reversing If the brushes on the motor are at 90 degrees to the commutator then no problem with running in clock or anti-clock as with a lathe or mill almost all running will be in one direction.

Download the manual from KB Electronics and or Minarik

http://www.kbelectronics.com/Variable_Speed_DC_Drives.html

Or

http://store.minarik.com/product/drives/minarik-drives/MM23001C

Hope this helps

Eric



Thread: Albion Gearbox 3 speed gearbox dismantling.
08/06/2015 21:50:55

Hi Peter

The problem looks familiar with the sprocket. It will have "Fretted" on the splines and is NOT screwed on and there will be a burr thrown up on the shaft.

Will you be re using the sprocket Then a protective plug on the end of the shaft and a hydraulic puller should tear it off with some repair to the shaft.

My limited Knowledge is that this is "Fluid Gear Grease" box with a mix of grease and heavy oil and some leaks were to be expected.

Modern Gear grease is far superior performance and almost no leaking.

Sure the clutch corks are worn but will be serviceable for a while.

A fiddly job to fabricate cork for the clutch with a Sharp knife and sand paper block to get them to fit.

Then soak the plate and corks in water and assemble the clutch using the spring pressure to clamp them.

When dried out dismantle Then true up the face of the corks. Lathe and tool post grinder comes to mind.

Eric


Thread: Major Systems Update at ARC
21/05/2015 20:54:08

Hi

Thanks Ketan for the "Mission Statement" for the set up of a new server that will be a valuable tool.

Do not ignore the friendly banter from others on this forum you can take it as upside down compliments

from people who have a high regard for for you and what you do.

To all who posted thanks for the humor and good natured banter this in my biased opinion will NOT happen between people of an unfriendly attitude toward each other.

Eric


Thread: Hammer Free Morse Taper Tooling Removal
24/04/2015 21:00:45


Hi

No brute force was used or excessive torque applied in tightening The lock-keeper bolts.

Insert the taper into the socket half to two thirds of the length of the taper and quick flick of the wrist to slap it home.

Then always used the method taught in the mid 20 th century to nip up lock bolts on morse tapers.

Thumb on the head of the spanner that is on the nut and gentle squeeze using the pinky and ring finger to nip up just firm.

Eric


24/04/2015 05:23:12

Hi
Not being happy with jarring loose the assortment of lock bolts on the morse taper tooling on my mill.
A better system was required so got down to making a puller to force them free and abandon the hammer in favour of a gentler and kinder on man and machine system.

Hope the photo's in my album "Morse Taper Removal" explain better.

Eric


Thread: Amolco mill
21/04/2015 19:17:50

Hi mike

Before you get all destructive with the pulley.

Try heating up the aluminium pulley and penetrating oil on the spindle.

Drill and tap three 8 or 10 m holes in the top of the pulley threaded rods and 10 mm thick plate drilled on the same layout as the tapped holes back off the the nut holding the pulley a couple of turns.

The spindle comes out the bottom of the housing the top bearing should be a light push fit on the spindle.

With the pulley removed you can press the spindle out the bottom or use a brass or soft metal drift drive it out.

Check that the spindle nut is Left or Right Hand Thread and to remove the key from the spindle.

Eric

21/04/2015 02:28:05

Hi Mike

A couple of checks before replacing bearings. Is the (1) "Pre Load" too tight (2) Too much grease in the bearings.

An Ampere meter on the motor leads is invaluable for checking the load on the motor and for setting pre load on bearings.

Or as Graham suggests New Bearings.

So a strip and clean examination.

How hot was the bearing housing and the motor casing Hand on for three seconds is fine.

Scorched skin on wet fingers is big trouble.

Eric

Thread: Whats the best mini mill?
16/04/2015 02:15:15

Hi Jesse

Your Quote

"PS: Trouble with the Micro is height in that as soon as you put a rotary table on the bed there's none left! Plus of course the Achilles heal that is the plastic gearing, one snatch and they are toothless.".

The first consideration buying a mill is what are you going to use it for Large jobs or small and intricate pieces.

New or used machine to fit your budget needs careful thought.

Personal Choice ((Biased Opinion)) based on owning an X2 Mill Drill with plastic gears, tilt column and quadrant arm spring thing to slow the fall of the head under gravity withe the gib lock loosened.

Many modifications later a small mill drill without the aforementioned hindrances performing much better.

The new models of X2 with solid column larger tables and belt drive would have saved many hours rebuilding and and modifying Although the challenge and the satisfaction would have been lost.

Horses for Courses. Small Mill Big Job = Trying & Testing Big Mill small Job = Less Stress.

Keep us posted on your decision and the reasons for your choice.

Eric


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 July 5 2018
JD Metals
Warco
cowells
walker midge
emcomachinetools
rapid Direct
Eccentric Engineering
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