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Member postings for Ian Parkin

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

Thread: Which is the most popular
31/03/2020 08:53:14

I dont know whether the publishers will thank me but if you subscribe to Magzter you get mew and me and most other magazines within the subscription mine cost me £60 per year

lots of woodwork,photography,men’s interests (and those too)

Thread: Brook Cub motor off Myford... funny thread?
28/03/2020 16:24:26

That stud has rolled threads....spoke thread?

Thread: Inverter failure guidance
28/03/2020 16:18:05

I’ve never seen a memory backup battery in any VFD

you can generally set default settings by a parameter

but i would look at your pot wiring first

Thread: Compressors
22/03/2020 21:55:44

Does the pulley on the pump get hot too?

Thread: QCTP dilema?
19/03/2020 15:00:54

Ian P

the piston and wedge type are very similar the toolholders are the same

but the piston pushes the toolholders out against the dovetails

the wedge type pulls the holders in towards the block

19/03/2020 09:54:55

Another consideration is to do with price as well

how many tool holders do you expect to end up with

i bought the Chinese piston type first (300 size)was quite happy with it but always had niggling doubts about its ridigity and repeatability

so at great expense bought a wedge type from USA ( 300 size not common over here)

and happy with that

ive had a Dixon type which came with my lathe but toolholders so expensive so sold that

and dabbled with a multifix ( the best in my opinion) but holders very expensive so sold that 

But all told now i have 50 toolholders all 300 size with various tools attachments in them.

so i would base your needs on the cost of toolholders...

Edited By Ian Parkin on 19/03/2020 09:57:11

Thread: G0704 type milling machine help - motors
17/03/2020 23:14:01

Wrinx

i,m in south sheffield and I have converted my mill (slightly bigger than yours) to 3 phase on both main motor and power feed

let me know if you want to look at it?

ian

Thread: Myford Super7 Valuation help
14/03/2020 15:25:41

Sorry looked at the sticky and they hosted on other sites

thought we had to be in our albums

14/03/2020 15:23:12

How did ben put those pictures on without them being in an album?

Thread: Finally got the milling machine home.
13/03/2020 08:19:24

How does changing the arbour work?

wont the taper in that just break free

all my mt3 tooling has fixed mt3 with m12 threads

Thread: Desoldering how to?
10/03/2020 18:32:06

I saw a desolating iron on amazon

https://www.amazon.co.uk/gp/product/B01N2H1CLS/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

and it works a treat on some sample boards

it leaves fully open holes components come straight out and new ones go easily back in

And only £13

i wish I’d had it yesterday desoldering 20 leds

Thread: Led id
09/03/2020 15:54:23

Thanks for all help i have large stocks of leds but none like the ones fitted

5095c026-f853-41f1-a1a6-9e0acc0e7744.jpeg

But after a job i hate stripped out all 20 uv ones and soldered in 3mm white ones I’m in business with white light

5mm ones wouldn’t go in the shroud so i had to downsize

its off a mantis microscope so should make all the small jobs go better

vision engineering wanted an astronomical price for a white led board

09/03/2020 12:48:19

Thanks bill

they are in a to18 can but i dont seem to be able to find any white in that can

09/03/2020 12:11:46

Can anyone identify these leds and suggest a replacement?

these are uv for a microscope i want to replace with white light

they are in a metal can withthe lens poking out the top

the body measures 4.66 mm and the can has a tag on it

from under the rim of the can to the top of the lens is 7mm

I need 20

d84809f4-c6d7-4f5f-8f6d-60a1447bd79b.jpeg

Thread: What does diamond turned mean?
03/03/2020 19:21:42

Howard

I was always under the impression that MPP’s were rather cheaper than the competition and looked down upon by the cognoscenti

having said that i suppose even £75 was a lot in the 50’s and 60’s

having said that I’m quite happy with my models that i own

certainly Basil Skinners book talks about the lack of funds at the factory for development

Thread: Colchester Student mk1 change gears
03/03/2020 19:11:10

dsc01847 (medium).jpg

 

Dc31k

Certainly on my Colchester student the 21 t is the driver for 4 rows of threads and feeds

the 42 is for 1 row of faster feeds and lower tpi’s

this with a student with a gearbox on as the op’s

Edited By Ian Parkin on 03/03/2020 19:12:37

Edited By Ian Parkin on 03/03/2020 19:13:49

Thread: What does diamond turned mean?
02/03/2020 12:38:50

But as Micheal G said you can see an iridescence in the top....would you not see that with any other type of cutter?

02/03/2020 12:37:38

John H

the knobs in question were supplied as lengths pre knurled and then diamond turned

I was just surprised to learn such an expensive process on a lowly camera part

img_2705.jpg

02/03/2020 08:48:34

So going back to a simple MPP camera knob why would you use a diamond tipped tool rather than a normal tool?

in the 60's to 80's

02/03/2020 08:31:00

I keep on seeing this term applied to mainly aluminium parts saying they have been "diamond turned"

what does this mean?

Mpp cameras have DT parts last made in 1988 so its not a new thing

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