Thread Number: 75176  /  Tag: Vintage Automatic Washers
Custom Control for Unimatic
[Down to Last]

automaticwasher.org's exclusive eBay Watch:
scroll >>> for more items
Post# 989918   4/8/2018 at 13:25 by lebron (Minnesota)        

lebron's profile picture
Hello all. The timer on my 1955 Unimatic was toast so I decided to wire up my own semi-automatic control. The first picture is the wiring of the control board and fuse. This entire thing is serviced from the original motor protector switch. I know little about electricity so I'm sure it could have been done a lot better, but I just wanted to throw this together to see if it would work. The washer seems fine and functions just like a normal Unimatic. Is there a backplate for behind the console? I wish I knew more about electricity and computers, but I had an idea. This is controlled by manual switches. Instead of a board of toggles could I have a board of relays? How can I control the relays then with a computer? I would probably need my own little 12V system that could interface with a computer program. Fun to dream if I had more time and resources :D

  Photos...       <              >      Photo 1 of 6         View Full Size



Post# 989919 , Reply# 1   4/8/2018 at 13:25 by lebron (Minnesota)        

lebron's profile picture
Feel free to check out the videos.


















Post# 989920 , Reply# 2   4/8/2018 at 13:29 by lebron (Minnesota)        

lebron's profile picture
Does anyone know how many amps a Unimatic draws during spin startup?

What about during full speed spin?

And finally agitation?

I assume it would actually draw more amps during agitation than once it is spinning full speed?


Post# 989966 , Reply# 3   4/8/2018 at 20:08 by eddy1210 (Burnaby BC Canada)        

eddy1210's profile picture





Post# 989969 , Reply# 4   4/8/2018 at 20:48 by bajaespuma (Connecticut)        

bajaespuma's profile picture

Brilliant!


Post# 990033 , Reply# 5   4/9/2018 at 10:09 by turquoisedude (Ogden & St-Liboire (where??), QC, Canada)        

turquoisedude's profile picture

Wow!  I love the idea of an 1140 rpm spray rinse.   Great job, Jed!


Post# 990037 , Reply# 6   4/9/2018 at 10:42 by swestoyz (Cedar Falls, Iowa)        

swestoyz's profile picture
Hey there Jed,

Great start so far! I've been using the following relay when restoring Unimatics, to control the motor via the original timer. It's listed at 30A @ 240v, which is plenty sufficient to carry the load for the transmission and moves the heat/current load from the delicate timers to these heavy-duty and easily replaceable relays.

www.grainger.com/product/...

Omron PN - G7L-1A-TUBJ-CB-AC100/120

If you are planning on having a low voltage controller/PC interface in place, I'd look at this 12v DC relay for the motor -

www.grainger.com/product/...

Omron PN G7L-1A-TUBJ-CB-DC12

For the water valve and the spin solenoid, you can probably get away with a relay that's rated at 10A 120v to control those devices.

Good Luck!

Ben


Post# 990099 , Reply# 7   4/9/2018 at 20:19 by jimmler (Nipomo, CA)        

jimmler's profile picture
A couple controllers come to mind that are affordable and fairly easy to learn: Arduino and Raspberry Pi
There is tons of info and interface boards available for both platforms. You could even hook them up to the Internet and control them remotely, etc. I thought about doing this with my Maytags, but they are my daily drivers, so I'm a bit skittish about messing with them.

Good luck!


Post# 990444 , Reply# 8   4/12/2018 at 15:26 by Jetcone (Schenectady-Home of Calrods,Monitor Tops,Toroid Transformers)        
I totally forgot about Robertsí

jetcone's profile picture
Rah-Hah Frigidaire test !! What a throw back! Nice Revive Eddie !!


That first machine is a Unimatic and it drew between 25-26 amps. The second machine, it is a Pulsamatic different altogether it drew 12 amps at spin-start before the start winding cutout.

I have tested several of my Unimatics and found the draw to be 25-26 amps in spin-startó HUGE !!

So that relay Ben pointed out will work just fine. I put one in my 57 Charcoal washer as the timer contacts were overheating on spin-start and that relay now lets the timer run cool and smooth





Forum Index:       Other Forums:                      



Comes to the Rescue!

The Discuss-o-Mat has stopped, buzzer is sounding!!!
If you would like to reply to this thread please log-in...

Discuss-O-MAT Log-In



New Members
Click Here To Sign Up.



                     


automaticwasher.org home
Discuss-o-Mat Forums
Vintage Brochures, Service and Owners Manuals
Fun Vintage Washer Ephemera
See It Wash!
Video Downloads
Audio Downloads
Picture of the Day
Patent of the Day
Photos of our Collections
The Old Aberdeen Farm
Vintage Service Manuals
Vintage washer/dryer/dishwasher to sell?
Technical/service questions?
Looking for Parts?
Website related questions?
Digital Millennium Copyright Act Policy
Our Privacy Policy