On the assumption that the screengrab is a fair representation of what the forum will look like in about a weeks time, then I have a few observations that I would like to make. I don't want to pre-judge because I realise its probably work-in-progress and I know operability on portable devices was a requirement but a few things about the posted image confuse me. (I should point out that I have no web page layout skills or experience but as a lay person the following jump out at me)

Why does it need,

3 instances of 'Forums'

3 instances of 'Subscribe'

What are 'Features' (maybe its a lucky dip button!)

'Gallery' Is that the signed-in members own pictures?'

Main? top banner shows 'Modelling Hub' which I dont recall seeing before, but the page is not clear whether its ME or the MEW).

I accept that the page is a 'Help' page, but in that case it should not really need all the other banners and stuff carried over.

My best wishes to Darren and all the moderators, hope all goes well.

Regards

Ian P

+1

Ian P

Brilliant Jason, was that from memory or searching?

Ian P

Gray

The smallest read head (really small!) is to use a bare sensor and put it your own housing. Some time ago a poster here showed how he enclosed and terminated these tiny modules.

I have tried searching this site but cannot find the relevant thread, the poster gave part numbers, wiring diagrams etc. I think the sensors are made and supplied by a European (Swiss?) company.

I'm not sure if the one is this picture is the same but this poster 'Jed Martens' has not posted recently (if this link works!)

https://www.model-engineer.co.uk/sites/7/images/member_albums/181671/846798.jpg

Ian P

I am very curious as to how a variable frequency 4Kw device can be made and sold at £5 and work flawlessly on (two different) motors.

What are the type of motors is it controlling?

Ian P

Just had a look down the list of thread titles in 'Latests Posts'.

(Just for fun and no criticism or offence intended to posters)

Milling Advice (can advice be milled?)

U Tube (that's new one on me)

Optical Elevator (not optical at all)

Information (that will really show up well in searches)

Play in new arbour for mill (more likely play in spindle?)

Measuring instrument storage (same as measuring anything else)

The above are just todays crop.

Ian P

It is best not to try and create a full concave recess that closely matches the ball surface, rather make a recess where most of the central area is relieved so the the ball is gripped just by an annular ring at the largest possible (for that size) ball diameter.

IanP

Running the spindle at the lowest speed is really only OK if its very slow, say less than 100 rpm. In any event the speed must not be fast enough to cause any bounce.

Whilst your plunger type indicator is not ideal you could probably just get the tip of it to bear on the on the inner surface at the mouth of the spindle taper bore.

Regarding the 'side by side' play you mentioned, its not really clear what you mean. I take it to be that you are turning the spindle slightly (CW and ACW) and seeing play in the driving splines? (if so, nothing to worry about).

If its 'side to side' movement and its not play in the bearings then it could be the quill is loose fit in the head casting.

Ian P

I totally agree Michael.

However the device I saw in a Dan Gelbart video was for centering work for drilling/milling not tramming.

I will have to read the paper again but I did not get the impression that the accuracy of the optical device would be as good as using conventional (Spindle mounted DTI swinging over the table) but for its medical purpose it makse sense.

Ian P

I totally agree Michael.

However the device I saw in a Dan Gelbart video was for centering work for drilling/milling not tramming.

I will have to read the paper again but I did not get the impression that the accuracy of the optical device would be as good as using conventional (Spindle mounted DTI swinging over the table) but for its medical purpose it makse sense.

Ian P

Unless I have misunderstood the details in the abstract and the fuller description in the second link, I dont think this device will be any use for centering a workpiece.

Its purpose seems to be to (only) ensure that the window is perfectly perpendicular to the microscope optical axis.

Ian P

I think one of the facts I learnt (from the BBC I think) is that when rebar rusts in conventional concrete it causes visible spalling on the surface, whereas with RAAC, the expansion caused by the rust just compresses and crushes the aero surrounding it so is completely hidden externally.

Ian P

'Just bent metal'

Not sure that is how Unbrako, Wiha or PB would like their products described!

As regards colour coded Torx keys, I've answered my own question as I have found out that not only are mine different to SOD's, I also have T8's that are black and red.

Ian P

Dave nailed it, thanks.

I should have twigged when I wrote that I could not access the site from my phone (which uses the same BT Hub router). I just cycled the power on/off this morning and its all back to normal.

Ian P

This site can’t be reached

www.homeworkshop.org.uk took too long to respond.

Try:

• Checking the connection
• Checking the proxy and the firewall
• Running Windows Network Diagnostics

ERR_CONNECTION_TIMED_OUT

--------------------------------------------------------------------

This Is all I get with Dave's link. I have cleared the Cache and deleted cookies. Oddly I get the same when I try on my phone.

Ian P

I get the, 'site cannot be reached' message now for the last few days.

Ian P

Colour coded, but is a size always the same colour?

Ian P

Duncan

I would quite happily use one of these sewing machine motors on one of my projects and in my own workshop but would be wary of recommending them to someone unless they fully understand the 'risks'.

As I and others have mentioned their electrical safety does not comply with UK regulations. The two main shortcomings are that all of the wiring and circuitry is directly connected to the incoming mains supply and the fact that the connectors are not mains rated.

The speed control uses a magnet and a Hall effect sensor and whilst the sensor operates on 5V the 5V supply is not isolated so indirectly has a path to mains voltage. Even if one were driving the magnet position via a mechanical linkage the sensor wiring and its enclosure etc should be rated for mains voltages.

I have not done any detailed examinations of the have (but never got round to using yet) but I would imagine that even the keypad only has an easily damaged thin membrane between the operators finger and mains voltage.

Ian P

Might be a bit late in the day to say it, but how do I read the 'Post on page 5'?

If it is not now relevant maybe just change the thread title.

Ian P

Have you calibrated or checked your 'push' for repeatability

Not all pushes are equal

Ian P