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

Member postings for sean logie

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

Thread: fitting new heating thermostat
23/12/2019 15:24:18

Thanks everyone .

Merry xmas


23/12/2019 10:39:13

Am I right in saying I will only need to use red and yellow wires for the new thermostat ?

Merry xmas

Sean img_20191223_095801-600x800.jpg


Thread: Threading on Colchester triumph 7 1/2
10/10/2019 15:46:22
Posted by Andrew Johnston on 10/10/2019 14:06:23:

+1 on an Ainjest unit.

I've got an imperial unit, on an imperial lathe, and it makes cutting imperial threads a doddle, even into blind holes like these 3/8" BSP glands:


Once I'd got the DOC sorted it was four passes and about a minute per gland at 260rpm with 4 thou clearance at the back.



What change gears do you run for metric. All I have are the 120T,42T and 36T which don't work for unless I've missed something on setup. Leadscrew is a 4Tpi. Serial No of lathe is 4/46477.

Any help would be appreciated.



10/10/2019 11:33:53
Posted by sean logie on 10/10/2019 11:32:28:
Posted by Ian Parkin on 10/10/2019 11:08:30:

You should have a 21 tooth to replace the 42 tooth one

as set you can do the bottom row of threads on the chart ( the coarsest ones)

The big idler in the middle doesn't appear to move vertically only in a left to right arc.

My apologies sir I missed where it can move up and down

10/10/2019 11:32:28
Posted by Ian Parkin on 10/10/2019 11:08:30:

You should have a 21 tooth to replace the 42 tooth one

as set you can do the bottom row of threads on the chart ( the coarsest ones)

The big idler in the middle doesn't appear to move vertically only in a left to right arc.

10/10/2019 11:04:36

img_20191010_104106.jpgBeen trying to cut threads on this old girl for a while, think I'm missing a gear and I'm hoping someone can help me out. Also I need to know the age of the lathe, is this possible from the serial number.



Thread: 1.5 hp dc motor
31/12/2018 11:44:51
Anyways ..... back to the job in hand and on topic ,I'm confused enough without being side tracked by the shocking stories (No pun intended 😉

31/12/2018 11:34:32

Well turned on the PCB the red light bottom right corner beside the dc output lit up had the pot wired as shown turned the pot and nothing happened, swapped the red and black wires around and still nothing . I'm wondering if the caps are blown .

Sean 20181231_111340.jpg

31/12/2018 10:29:27
I too have had multiple 240v shocks over the years . My father was thrown across his workshop years ago by a poorly earthed 415v welder plug he nearly lost all the strength in his right arm ,never did fully recover from it .

30/12/2018 20:17:32
Thanks Dave ,been having a few sherbits this evening ,best not try powering up the motor tonight . Appreciate your input .

30/12/2018 16:39:05
If you don't hear from me you'll know it gone tits up 😂🤣I'm having a beer just now will have a look later on 😉.

30/12/2018 12:39:00


Some more photos of the PCB , motor runs really smooth albeit at slow rpm 😁.



Edited By sean logie on 30/12/2018 12:43:31

Edited By sean logie on 30/12/2018 12:54:06

30/12/2018 08:49:18
Posted by XD 351 on 30/12/2018 08:42:21:

Sean , it would appear to me that you have little experience with mains powered electrical or electronic items so i would suggest you leave it alone until you can get some help from someone who does .

Your controller may just be a simple ac to dc converter and pwm controller but i can't work out what the black lead does . The red ones are probably power but can't be sure . You don't know yet if the controller even works and it could be dangerous to power it up .

I would look around on some various sites like ebay or bangood for a pwm controller that can handle the power requirements of the motor and buy one of them .

I'm not going to be using the original speed controller . I have other plans .


29/12/2018 20:56:52

Now I'm confused (not hard) which is it ? 240vdc or 110vdc . I've been researching YouTube and the net ,and I'm thinking of going the SRC motor controller and bridge rectifier route , but things like 240vdc being more dangerous simply worries me 🤔😐. So can anyone say for definite what this motor is , I'm tempted to throw it back in the skip 😁😂. On a side note , I'm not needing this motor to run full tilt but will it have torque at low rpm say at 100-200 rpm 



Edited By sean logie on 29/12/2018 21:00:31

29/12/2018 19:12:24

There wasn't any display in the middle it was missing ,and as far I could see the circuit board I have was the only one .


29/12/2018 19:06:31

What would you suggest , I wouldn't know where or what to look for ,more so not knowing what to look for .


29/12/2018 18:46:46

So I can't use what's in the photos ?

29/12/2018 18:38:13

It's off a treadmill don't know what model . I have the stop start and the speed control switches, I forgot to take the power on switch .



Edited By sean logie on 29/12/2018 18:40:38

29/12/2018 13:58:54
My wife has the all singing and dancing treadmill in the spare bedroom and hardly uses it .

29/12/2018 13:21:15

Was at recycle centre today and score a dc motor . The guys there let me strip all the parts I might need . Next is how I'm going to get this thing working ,kinda hoping you guys on here might know 🤔.



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

Latest Forum Posts
Support Our Partners
Eccentric July 5 2018
Allendale Electronics
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