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Discussion Starter #1
I've been using Scott Oilers (and others) for years, but have never been completely satisfied with them. The quantities of oil dispensed was never consistent. It seemed that there was always too much or too little being dispensed. Additionally, the oils used, at least in the Scott Oilers, were pretty thin and therefore there was lots of fling-off. The rear wheels were always a mess.

To address some of these issues, I decided to make my own oiler:



90 weight hypoid gear is gravity fed to the chain through the solenoid.

A microcontroller monitors the ambient temperature and adjusts the time the solenoid is on to provide a single drop at the varying temperatures. A 4 position dip switch allows selection of the time period between drops. As configured now, there are selections of 1 through 10 minutes in one minute steps, and 15 through 30 minutes in 5 minute steps.

The oil reservoir is simply a 1/2" tube that runs to the solenoid:



It snakes up to where you see the capped end. After filling, the end of the tube is tucked under the plastic panel at the rear.

I'm still experimenting with time period intervals, but so far, 15 minute periods have worked well. The chain remains moist and there is virtually no fling-off.

As an aside, I've never used gear oil on my chains before. I'm really pleased with the performance of the gear oil. It seems to provide a cushioning effect with the chain going over the sprockets. It's both quieter and smoother than what I have been used to.

Ron :mrgreen:
 

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Ron that is awesome, I wish I was that innovative. I have s Scott Eoiler it works much better than the older ones. There is still some fling but not as bad as the older ones.
Were did you get the parts to make yours?
 

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Brilliant, but I'd like mo bettah pics of the solenoid and controller.
Put a Gold star on this guys collar!
What is the refill interval of you reservoir?
 

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I was going to order a Scottoiler this week, but I love DIY stuff. Can you give some specs and a source on the solenoid you're using? :thumbup:
 

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Discussion Starter #7
Thanks for all the kind words! Here's some more info.

The solenoid that I used is a bit of overkill for this application. It's got extra ports that I didn't need, so I blocked them off. I had a few of these left over from some portable emission analyzers we used to make.

I think any 12 volt solenoid would work. The one I used was intended for air or gasses as were just about all the ones I looked at. I wasn't sure if it would work with the 90 weight, but it does. I ran it for about 24 hours with 90 weight before I decided to use it. It's a fairly expensive solenoid, more so than necessary for this project.

Here's a closeup:



If I hadn't had these, I would have bought something much cheaper. I saw some 12 volt miniature solenoids at one of the surplus sites on line for about $3.00. I would have bought a couple of those if I didn't already have the one I'm using.

The rest of the unit, except the circuit board, is just Home Depot type stuff. A 1/2" reservoir tube is the upper part of the assembly. It is reduced down to 1/8" at the solenoid. An 1/8" tube goes from the solenoid to the chain. I had a Scott Oiler on the bike previously and just reused the tubing and dispenser nozzle.

I designed and made the circuit board and wrote the program for the microcontroller. All the parts on the board are standard electronic parts from Digikey.

Here's a picture of the (hand drawn) board taken while prototyping:



You can see there's really not much to it. Modern microcontrollers have really reduced parts counts. Much of what used to have to be done with hardware can now be done with software. The power supply portion is up at the top of the board. The microcontroller is the multi-pinned chip in the middle. To the right of that is the temperature sensor. Top right is the programming connector and bottom right is the dip switch. There is an LED to the left of the micro that was used during debugging.

Ron :mrgreen:
 

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"There's really not much to it" maybe for you. I have a hard time changing batteries. Man I wish I could do stuff like that.
 

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As the Scare Crow said, If I only had a brain! Dude wanna market a kit? it may be a wunnerful cottage industry.
Some of us are end users and not constructors of devices.
 

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That is very neat!

My Dad something more basic on a few of his bikes. He used a solenoid too but had it rigged to the front brake switch. One drop every time he braked. Later on he added a switch so he could switch it off around town or when riding in a manner which required frequent braking...His reservoir was a 35mm film canister.
 

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I was very impressed with this and decided to make my own but without a micro controller. I have a question though. I have adjusted it to drip about every 26 seconds. Does anyone know if this is an appropriate rate? Should I make it drip less? I will say that I don't want it to drip more than what I have now.
 

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My Scott Eoiler recommends one drop every 50 to 60 seconds when dry more if wet or dirty. I have it set at 60 seconds between drops. Chain is shinny and fling is minimal.
 

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Thank you very much! I made a somewhat calculated assumption that 26 sec was kind of on the wet side. I will do some more adjusting.
 

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So I guess I'm a copy cat

I ended up making an oiler myself with a 1/8" NPT normally closed solenoid from ebay. I wired it to the tail light wire so that it can only run when the bike is on, and I added a lit switch (that I know will corrode and fail eventually). I wanted the switch because I plan to use the oiler about once a week to and from work. I figure that even oiling a chain once a week will be more attention than it usually gets on any bike. I finally got the drip rate adjusted to drip about every 80 seconds or a bit more. My system isn't as fancy as the one in the thread I am jacking, but I am not an electronics engineer, so I do what I can to my abilities. Here are some pics.








 

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Discussion Starter #19
seriously, would you consider making these and selling them?

ked
Sorry to take so long to answer. I've been away (Lake Powell).

I thought about possibly assembling a kit as notacop suggested. Most likely, the cost would be more than most would want to pay. The circuit board and parts in small numbers would probably be somewhere around $50.00. The cost of a solenoid and plumbing parts would be additional. I looked at solenoid prices and they vary from about $3.00 (surplus take-outs) to around $50.00 new.

Ron
 

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Discussion Starter #20
Nice job. What make and model micro controller?
It's a PIC 16F616.

When in the planning stage, I thought I might use the speed of the bike as one of the parameters for computing the amount of oil dispensed. The 16F616 has a capture module that is useful for measuring the time period of the speed sensor. Miles per hour can be computed from that. As the project progressed, I decided to use fixed time periods instead of vehicle speed as a method of dispensing the oil. Without the requirement of determining mph, many other chips would have worked, but I already had the 16F616 on the board.

Ron :mrgreen:
 
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