Support our Sponsors, they keep FADU free:   AG Photographic   Keyphoto   The Imaging Warehouse   Process Supplies   RH Designs   RK Photo   Second-hand Darkroom Supplies   Silverprint Ltd

Notices

Go Back   Film and Darkroom User > Equipment > Darkroom

  ***   Click here for the FADU 2015/2014 Yearbooks   ***

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 4th January 2019, 05:07 PM
longhouselife longhouselife is offline
Friend
 
Join Date: Nov 2018
Posts: 69
Default Enlarger timer

I was fortunate to be gifted a darkroom setup just before christmas from a former photographer.

All seems good, however the enlarger timer is marginal.

0.1 - 0.9 secs working
1 - 2 secs working, 3 - 4 secs seem too long, 5 - 9 not working
10 - 99 not working.

I have no knowledge of electronics... Any suggestions, advice, help etc welcomed









Reply With Quote
  #2  
Old 4th January 2019, 06:36 PM
Lostlabours Lostlabours is offline
Friend
 
Join Date: Apr 2012
Location: West Midlands/Aegean
Posts: 1,676
Default

Try some switch cleaner.

Ian
Reply With Quote
  #3  
Old 4th January 2019, 06:53 PM
longhouselife longhouselife is offline
Friend
 
Join Date: Nov 2018
Posts: 69
Default

Quote:
Originally Posted by Lostlabours View Post
Try some switch cleaner.

Ian
Which is what exactly and where am I cleaning..?
Reply With Quote
  #4  
Old 4th January 2019, 07:45 PM
John King John King is offline
Friend
 
Join Date: Nov 2012
Location: County Durham
Posts: 2,390
Default Cleaner

What is termed as 'switch cleaner' is usually a highly volatile solvent liquid in a spray can. What I use and do so regularly, is brake and clutch cleaner which is readily available from Halfords. It is pretty well much the same as electrical cleaner used in TV repair workshops, but costs a mere fraction. It will shift dirt like liquid Pickfords, dry is less than a minute and will leave no residue.

It will not harm electrical contacts, insulation or any paintwork, it will just clean them.

It does smell a bit - actually it is quite pungent, but not offensive like bad eggs, but better to use it in a well ventilated area. It is also inflamable!

Last edited by John King; 4th January 2019 at 07:49 PM.
Reply With Quote
  #5  
Old 4th January 2019, 08:48 PM
alexmuir alexmuir is offline
Friend
 
Join Date: Jan 2010
Location: Glasgow, Scotland.
Posts: 2,315
Default

You need to get the cleaner into the guts of the rotary switches. You may need to remove the knobs, then the retaining nuts to get in at them. The knobs may have a grub screw securing them, or simply a push fit/pull off. If you do that, set them all to the minimum, or maximum setting first so that itís easy to get them back together with the pointers in the correct position. If the switches are fully encased, a spray cleaning product might be best.
Alternatively, pick up another timer from eBay. I was browsing there last night and there are some good bargains in darkroom stuff at the moment.
Alex.


Sent from my iPhone using Tapatalk Pro
Reply With Quote
  #6  
Old 5th January 2019, 11:04 AM
longhouselife longhouselife is offline
Friend
 
Join Date: Nov 2018
Posts: 69
Default

Quote:
Originally Posted by johnking
What is termed as 'switch cleaner' is usually a highly volatile solvent liquid in a spray can. What I use and do so regularly, is brake and clutch cleaner which is readily available from Halfords. It is pretty well much the same as electrical cleaner used in TV repair workshops, but costs a mere fraction. It will shift dirt like liquid Pickfords, dry is less than a minute and will leave no residue.

It will not harm electrical contacts, insulation or any paintwork, it will just clean them.

It does smell a bit - actually it is quite pungent, but not offensive like bad eggs, but better to use it in a well ventilated area. It is also inflamable!
Many thanks for the info John.

Quote:
Originally Posted by alexmuir View Post
You need to get the cleaner into the guts of the rotary switches. You may need to remove the knobs, then the retaining nuts to get in at them. The knobs may have a grub screw securing them, or simply a push fit/pull off. If you do that, set them all to the minimum, or maximum setting first so that itís easy to get them back together with the pointers in the correct position. If the switches are fully encased, a spray cleaning product might be best.
Many thanks for the info Alex.

As an aside I would have to drive to Glasgow or Inverness to get even close to a Halfords, but I will ask about in Fort William next time I am off the island...
Reply With Quote
  #7  
Old 5th January 2019, 11:08 AM
Lostlabours Lostlabours is offline
Friend
 
Join Date: Apr 2012
Location: West Midlands/Aegean
Posts: 1,676
Default

Quote:
Originally Posted by longhouselife View Post
Which is what exactly and where am I cleaning..?
This is where I miss Maplins, they were great for things like switch cleaner, Come their resurrection . . . . . they are recruiting

As others have said you need to get it into the switch. Usually it's dirty or oxidised contacts. You need to keep rotating the switch while wet with the switch cleaner.

Ian
Reply With Quote
  #8  
Old 5th January 2019, 11:12 AM
longhouselife longhouselife is offline
Friend
 
Join Date: Nov 2018
Posts: 69
Default

Quote:
Originally Posted by Lostlabours View Post
This is where I miss Maplins, they were great for things like switch cleaner, Come their resurrection . . . . . they are recruiting

As others have said you need to get it into the switch. Usually it's dirty or oxidised contacts. You need to keep rotating the switch while wet with the switch cleaner.

Ian
Many thanks Ian.
Reply With Quote
  #9  
Old 5th January 2019, 11:29 AM
mpirie mpirie is offline
Friend
 
Join Date: Jul 2009
Location: Highlands of Scotland
Posts: 358
Default

Quote:
Originally Posted by longhouselife View Post
As an aside I would have to drive to Glasgow or Inverness to get even close to a Halfords, but I will ask about in Fort William next time I am off the island...
Depending on which island you are on....I may be closer than Glasgow or Inverness and can let you have some contact cleaner.

It's possible that the build up of carbon from the tracks of the rotary potentiometers is stopping the current flow to some of the other pots.

Flushing the pots out with cleaner would be the best place to start.

Mike

As an afterthought.....a good petrol station may have spray tins of brake and clutch cleaner.....could save you a long trip.
Reply With Quote
  #10  
Old 5th January 2019, 11:33 AM
longhouselife longhouselife is offline
Friend
 
Join Date: Nov 2018
Posts: 69
Default

Quote:
Originally Posted by mpirie View Post
Depending on which island you are on....I may be closer than Glasgow or Inverness and can let you have some contact cleaner.

It's possible that the build up of carbon from the tracks of the rotary potentiometers is stopping the current flow to some of the other pots.

Flushing the pots out with cleaner would be the best place to start.

Mike

As an afterthought.....a good petrol station may have spray tins of brake and clutch cleaner.....could save you a long trip.
I'm in Knoydart, so not exactly an island, but as good as...
Reply With Quote
Reply

Tags
darkroom, timer enlarger
Support our Sponsors, they keep FADU free:   AG Photographic   Keyphoto   The Imaging Warehouse   Process Supplies   RH Designs   RK Photo   Second-hand Darkroom Supplies   Silverprint Ltd

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanted: Enlarger Timer ianbarber Sale or Wanted 5 22nd August 2018 03:20 PM
Enlarger timer RussKelly Darkroom 0 14th September 2014 11:10 AM
FS: Baeuerle enlarger timer paulc Sale or Wanted 2 7th May 2012 06:56 PM
Durst enlarger - what timer? Lozkins Darkroom 8 24th March 2012 05:32 PM
Enlarger timer issues PaulG Darkroom 20 27th November 2009 12:29 PM


All times are GMT. The time now is 05:47 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.