Member postings for Colin Heseltine

Baz,

Thanks for confirming that. Hillclimber and I can now source suitable BMS stock to manufacture our missing bits.

Colin

Hillclimber,

I cannot reconcile your comment about the bed being displaced 1/8" rearwards. If you look at instruction 2 in your initial post it states:

2.Fit the Bed Raising Plate on to the Bed with the front edges level, after sufficiently retracting the Adjuster Screws.

I wonder if Baz could confirm whether the roll pins in his 1.5" x 1/2" x 24" bar are on the centre line, i.e. 3/4" in from each side of the bar. Perhaps this is not an original and was made by the previous owner.

Based on cost of piece of bar I think I would want to get the width right first time.

Have not as yet found any 90mm x 6mm, but can find 100mm x 6mm. It may be a case of milling off the unwanted 10mm.

These extra bits will certainly make the folder more versatile.

Regards,

Colin

I too will be searching for suitable bright bar to make the missing pieces.

Colin

The top photo shows the bending channel front and in the second photo (on its side) you can just see the spacer bar.

Colin

Hillclimber,

I have just checked my 620 folder.

The bending plate channel front is 24" long x 1.75" high x 0.25" thick.

The bending plate bottom spacer is measured as near as possible 22.25" long x 0.750" tall x 0.375" thick

On my machine this gives a slot as near as possible to 1" in depth.

The documentation lists the bending plates as being 90mm x 6mm in lengths of 600mm, 100mm, 50mm, 25mm, 12mm.

The bending plate packer just says it is 3mm thick.

I do not have a Bed Raising Plate or the bending Plates or Packers and will now get some made.

The bed on my machine is 1.75" wide so I would have expected the bed raiser plate to be the same width.

Colin

Just one 99% of the time. I have Bridgeport sized machine and the 6" Bison vice is rather large and fitted in centre of table. I had a job the other week which required the large 10" rotary table. Left the vice on, centered the rotary table under quill and mounted the job. Only to find about 10mm short on X axis movement. Removed every thing, took vice of and put RT in middle of table. Because of the weight of the vice, rotary table and Bison indexer I would rather have them in middle of table than overhanging the knee and risk flexing the table.

Colin

An absolutely stunning piece of work.

Colin

Clear in-focus steady video

Clear concise speech (preferably without lots of umms and errrs). I like to hear some description on what is being done, or why it is being done in a particular way.

Preferably no music

It text used in the video, then ideally without heavy use of red or green text (as 8% of males are red/green colour blind to some extent) me included.

Colin

Went to ARCEuro to collect some 2 flute milling cutters. As was dry (when left home) decided to go in Caterham 7. Had good chat to Ian (who is into cars in a big way) and good chat to Ketan. Both very helpful guys. As I left it went black and the rain chased me all the way home. Only problem was when stopped at traffic lights otherwise rain went over my head most of the time.

Came back home managed to mow the lawns, then get some more ali milled of the gear lever I am making for someone.

Colin

Edited By Colin Heseltine on 14/08/2021 21:50:17

I tried the mobile number and email address I'd found but did not get a response.

Colin

Hi there,

Has anyone recently used the services of Darren and Pete (ex Myford) to service their Myford 7 lathe. If so does anyone have a current email address or telephone contact number.

Thanks,

Colin

DC31k,

Thank you for confirming that. I obviously need to build up my knowledge of these various formulae.

I had planned to plunge cut the end points first but take your point of using a smaller cutter initially. Will revise my machining sequence notes.

Thank You,

Colin

Paul,

Thank you so much for that CAD drawing. The guy who wants this lever has just given me a hand drawn schematic with dimensions. I do have a CAD package but it is 12 months since started to learn it and last used it and I think it would have taken me all day to draw up that lovely drawing of yours. The stop and start angles will help considerably. I have just taken a look at the graduations on my large 10" Parkinson rotary table and see whether I can get to that level of accuracy, and it looks as though I can. Quick question> Is that 41 degrees 41 minutes or 41.41 (decimal parts of degree). One turn of the handle gives 5 degrees of movement, and each degree is split into 10ths. The graduations are large enough to split into 4 by eye if required. I do have a 6" stepper driven rotary table but have never tried to mill whilst the stepper is driving it.

Thank you,

Colin

Dave

Thank you. This forum is so full of helpful people.

Colin

Peter,

Many thanks for that. I was just looking through my Mothers copy of Machinery Handbook at the geometry propositions and thought back to something Joe Pieczinski said about it all works on triangles. So looked at my drawing, remembered Pythagorus's theorem (25 squared - 18.75 squared gives result of 273.44, which when square rooted give 16.536mm) and came of with figure of 16.536mm, which rather matches your 16.54mm. So between us you have answered my questions and I've amazingly also answered my own question.

Thanks,

Colin

Niko,

Thanks. Corrected

Colin

I need to machine several radiuses on an aluminium bar, which will eventually end up as a gear lever for a sequential gearbox. Looking at the drawing above the 10mm diameter is a hole bored through the bar as a pivot. The outer sides of the bar are to have a radius of 15mm. The bar is 17.5 mm width.

For the first radius, on the basis that I machine the bar from the right hand side 8.75mm above the centre line how do I calculate the point at which I cease travel of the X axis so that I can then blend into the 15mm radius. Assume that I use a 10mm radius cutter. My maths and geometry was never very good, plus it was over 55 years ago. I wouid assume that once I have a formula I can use this for the remaining radii.

Thanks,

Colin

Edited By Colin Heseltine on 08/08/2021 12:09:42

I'm coming up to 72 and will regularly go out very early on a Sunday morning into the Peak District or up to Yorkshire Moors will the lads in our Caterham/Lotus Sevens., or longer 2/3 day weekends in Scottish Borders. 210hp car, sub 4 seconds to 60. Keeps the mind and reactions working quickly.

Colin

Martin,

It is a photography strobe.

Colin

I have an underwater strobe light which is no longer holding charge and wish to change the batteries. It is fitted with 6 off 1.2v 2200mAh tagged batteries giving a 7.2V supply.

Having opened the battery pack I can see couple of the batteries have started to weep. The other problem is the printed circuit switch has corrosion on its tracks. What is the best way to clean this corrosion of the board and its corresponding rotating connector.

Any recommendations for procedures to follow when changing the batteries.

Thanks,

Colin