More detailed information about Craftsman 1/2 horsepower opener

AndrewBolingerAugust 8, 2011

Hello, I am looking for a bit of information. Here is the background:

I am planning on using this old craftsman garage door opener as a motor for the purpose of raising and lowering some stairs. Given the weight of the stairs I am planning on setting up a more favorable gear ratio for the motor, however, this requires it to run for longer than it usually would.

I have removed the plastic gear mechanism that tells the motor when the door has reached it's final location. I was hoping to preserve the rest of the circuitry and not have to hotwire the motor so to speak. To do this I was just going to have these existing contacts be triggered when the stairs reach the up/down position.

HOWEVER: even with this contact mechanism removed, the motor will only activate for a certain number of seconds before it is deactivated, as if the contacts were triggered. I was wondering what kind of other mechanisms the garage door opener might use to deactivate itself after a set number of turns. Anyone know?

I have noticed there is some kind of IR sensor which detects the motor's movement. I was wondering if there was some kind of counter in the logic board that would use this sensor to count up to the maximum allowable turns, then deactivate the motor. I tried to trick it by covering some of the holes with tape, but it seems to be primarely used to assure a certain motor speed so changing what it thinks the speed is causes the motor to deactivate.

Hope one of you knows enough information about how these are designed to help me out! Otherwise, I will have to make my own motor control circuit and forget about the existing one.

Thanks in advance.

Thank you for reporting this comment. Undo
don_1_2006

It sounds like you have disconnected the sensors in the doorway. Without them it will never operate like you want. The sensor you are experimenting with is not counting anything. By interrupting an infra-red beam the black plastic cup causes a pulse to be sent to the logic board. When the door hits an obstruction it causes the motor to stall and the pulse is no longer sent. This causes the motor to stop if the door is on the way up and to reverse if the motor is running in the down direction. Have fun.

    Bookmark   August 9, 2011 at 9:53AM
Thank you for reporting this comment. Undo
randy427

Have you also disabled the UPFORCE/DOWNFORCE protection?
A GDO is not designed to lift a heavy load by itself. A garage door must be in fairly good balance with its springs to operate correctly or the sensors will detect an overload.

    Bookmark   August 9, 2011 at 9:56AM
Sign Up to comment
More Discussions
Sears GDO does not close
I've searched on the forum without any luck. My Sears...
jerseybob_gw
Light on my garage door opener won't turn off
The light on my old Genie Medallion Series garage door...
liviey
Turning part of garage into storage/man cave/laundry
Some background in my project: 1. I need a study, so...
toffee-el
GDO / SENSOR LITES? ONE GREEN - OTHER ?
craftsman 1/2 hp battery key pad ok / remotes &...
bronxbill
Snowblower help
I have a M t d model 317e760f118 track driven snow...
thechad1985
Sponsored Products
Harbor Outdoor Teak Pedestal
$229.00 | FRONTGATE
Serena & Lily Wyeth Duvet Cover
Serena & Lily
Gray & White Elle Sideboard
$199.99 | zulily
37" Lyndon Red Cherry Vanity
Signature Hardware
20-Piece San Remo Flatware Service - RED
$44.90 | Horchow
Sutton Successor Black Table Lamp
Lamps Plus
Home Decorators Runner Rug: Divani Terra and Beige 2' 6" x 8'
Home Depot
Upton Home Scrolled Black Corner Etagere
Overstock.com
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™