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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: Electric Motors
31/05/2018 02:53:24

Hi Raph

Check that the motor bearings are not binding and the lathe turns freely.

How big is the work you undertake. Large diameters and heavy cuts and feed rates will quickly use up available power.

Being a DC motor Addict another alternative is AC To DC converter-speed controller driving a DC motor.

One downside to single phase motors on a lathe is on another forum that i contribute to.

**LINK**

The reply sums it up very well. Keep us posted on progress

Eric

Thread: What's the best alternative to 'loctited'
23/05/2018 01:32:20

Hi

What is the best alternative to Loctite.

Take more care when machining and make it fit properly!!!

Not always look at the job in hand and formulate the best approach.

Eric

Thread: SC3 Headstock bearings
06/05/2018 05:16:59

"Does the plastic bearing cover have to be shimmed out to accommodate the extra width when fitting TRBs, if so by how much ?"

7206B is 17.25 mm wide

6206 is 16 mm wide

Polish the spindle opposite the chuck under the bearing to a firm sliding fit to allow the preload to be set properly.

Eric

Thread: Pressure as a unit of time
26/04/2018 15:41:42
Posted by Stewart Hart on 25/04/2018 16:23:24:
Posted by Speedy Builder5 on 25/04/2018 15:41:46:

When I was working, TIME = PRESSURE. in pressure terms, 0 Psi = breakfast at home, 70 Psi after the morning meeting, Mild panic at midday, no time for lunch. Most pressure came towards the end of the day at 300Psi so the clock was about right.
BobH

Never thought of it in them terms:- working under time pressure, or pressured by time, lack of time pressure etc etc.

Stew

 

Hi I made this to compensate for this by adding an unloader valve

Happy being retired this device is working perfectly for me.

Eric

Edited By oldvelo on 26/04/2018 15:50:12

Edited By oldvelo on 26/04/2018 15:52:49

Edited By oldvelo on 26/04/2018 16:00:29

Thread: Advice on Belt Tensioners
12/04/2018 04:39:19

Hi this is one from my album of the Vee Belt clutch on my wood lathe

 

More pics in my album may be what you are looking for

Not too clear thethe clutch lever goes just over centres and on to a stop that can just be made out in Pic  1

Edited By oldvelo on 12/04/2018 04:42:10

Edited By oldvelo on 12/04/2018 04:48:29

Thread: Tufnol (Textolite) as a material for pulley
25/03/2018 21:06:21

Hi

"Converting the drive to Poly-Vee would allow the use of much smaller pulley diameters."

I agree with Michael Poly Vee drive is the way to go having converted 8 machines in the workshop.

Aluminium being the material of choice for pulleys. No apparent wearing even on a very old drill press that came from a busy engineering workshop.

Eric

Thread: DC motor controler ?
22/03/2018 02:30:34

Hi Carl

Here is another link to a unit that may be useful. RS are way off with there description it is NOT AC to DC at all is is for a low power AC motor ( Extractor Fan)??? perhaps

**LINK**

Set up seems to be straight forward enough with the controller to match the motor.

Eric

 

Edited By oldvelo on 22/03/2018 02:35:32

20/03/2018 19:45:41

Hi

More info on the end use would be useful. Assumption is mother of all misunderstanding

X1 Mill ?

No connection with KB Electronics on my part just satisfied user

Start looking here

**LINK**

Expensive but very reliable

More here using one from this source using one on a band saw.

**LINK**

Thread: Yet another bandsaw question
16/03/2018 02:49:02

Hi Robin

Looking at the photo and your description shows things to check. The bore of the pivot is not parralel to the mitre base of the casting the saw is mounted on or the bottom of the vice and the main frame casting the saw pivots on.

Excess clearance on the saw frame pivot Bush?

Check that what looks like there is two castings bolted together  the vice casting and the base of the mitre and could be separated and shimmed to correct the error

Unfortunately you will need to dismantle to check on a flat and true surface.

This error should be able to be corrected with  time and patience as You have identified  the problem

 

Eric

 

 

Edited By oldvelo on 16/03/2018 02:59:56

14/03/2018 18:36:19

Hi

A link to an excellent manual on the set up of a band saw By John Pitkin

**LINK**

Eric

Thread: Destroyed lathe
24/01/2018 19:19:09

Hi

Bazyle has is right normal pallet is totally inadequate to transport any lathe - mill other than a small bench top models.

Build a timber frame that is Bolted through with large washers as nails can pull out easily.

Thread: Newton Tesla Electric Drives
20/01/2018 18:28:33

Hi JES

Perhaps this is an intrusion But hopefully it will explain why "Single Phase Motors" run roughly and cause Chatter Marks when Machining. Had this explained to me on another forum

To Quote Ken's Explanation

**LINK**

I hope this will convince more out there that there are better alternatives to "Single Phase Motors"

PS The Extra cooling fan is a great idea

Thread: Lathe start-up speed best practice.
07/12/2017 18:38:25

Hi I have been fiddling with variable speed DC drives for a number of years now and found that controllers that the ramp up to speed with variable adjustment will give the best service.

Read the manual for your machine and follow the instructions there are far to many speed controllers out there to be able to offer a universal answer covering all.

If you have deep pockets go for an industrial controller rated for higher power than the motor Horse Power.

Properly adjust the settings to suit the motor then you can expect a long and trouble free life from it.

Thread: LATHE BED SLIDE OIL
06/12/2017 07:48:36

Hi

Chainsaw bar oil has a "tackifier" additive to keep it hanging on even at very high speed.

It sticks on very well on the vertical slides on my mill.

The loading on a chainsaw links is extremely highly loaded compared with several Sq Cm of even a small lathe.

Any oil is better than no oil. Oil Little and often and regular wipe down works best.

Thread: The question about drawbar for milling machine.
23/11/2017 18:19:15

Hi Jens

Check my albums for all size lock bolts

Eric

 
Thread: Has anyone regretted migrating from MS Winows to Linux?
18/11/2017 18:32:06

No!

Thread: V Belt Conversion
18/11/2017 18:29:09

Hi Ken

Go for it a poly vee belt conversion is far superior to vee belts just look under the bonnet of any modern motor car.

One disadvantage is that the alignment of shafts and pulleys has to be spot on. No problem it engineering we do isn't it.

Converted my workshop drives to poly vee belts and no regrets on the Eight conversions so far.

The will drive at much slower speeds and bigger ratios.

Eric

Thread: Material for swarf guards
03/11/2017 09:22:04

PolyCarbonate is the way to go it can be shaped in a sheet metal folder Protect with thin cardboard sheet no heating required.

I have several for lathe and milling machine been in intermittent use for a number of years now.

Thread: Size of generator for a large electric motor
18/09/2017 18:36:34

Hi

Perhaps I Have read this wrong.

What is the Tractor Horse Power? Then a diesel of similar power to drive the machine directly would be the way to go.

Eric

Thread: Small polyflex belts
10/09/2017 05:31:24

Hi Mark

Is this the belt type on your machine "Gates 5M710. PolyFlex® 8902-0710 V-Belt - 5M Section, 3/16 in Top Width, 27.95 in Outside Length, Polyurethane Material "

What is the motor power on your lathe as this size seems to be big enough for nothing bigger than around 1/8 hp. unless on very large diameter pulleys with very high peripheral speeds are used.

Polyurethane belts do not perform very well when excess slippage occurs when used as a clutch.

Being a convert to "Poly Vee Multi Rib Belts I ditched Vee Belts on my machines where ever possible and have run them trouble free for several years now.

Broken belt suggests that it is being used to attempt to transmit a high torque loading on a very small belt cross section.

This MAY help better prices LINK   and in my VERY biased opinion a good deal

Eric

 

Edited By oldvelo on 10/09/2017 05:40:40

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