Hello Dave,
that is a good way to go with the blow off valve.
Just keep in mind to make safety relevant sealing tests never with air but always with incompressible water.
For the oven I have a few tips. (a year ago I finished a Labratory oven for paint solvents that was supposed to work at 105ºC +/- 2ºK. I got it to an accuracy of +/-0,3ºK.
1. use best high voltage resistences at low voltage. (in my case 240V/80W became 120V/40W) that way you do not get red hot resistences but stay black and will not become a ignition source .
2. do not use termostates but PID regulator with "puls with modulating" or "fase cut in modulation" out put. (with patience and a little experience you get its behaviour well adjusted)
3. after the obligatory cut off contactor use a SSR "solid state relay" and you are free off hastle with sparks and worn contacter points.
4. use a temperature sensor that is trustable. (from -50ºC to 150ºC I use a type that is called KP10 it has a voltage output equivilant to ºKelvin =>2,73V=273ºK=0ºC=32ºF, which has its ageing curve for 15 years already preprogramed in its sensor chip. => it even survived 3 month connected under water without need of recalibration after I resoldered the eaten up pathes)
other good ones are PT100 or PT1000 "as long they or their connections do never get wet or humid"
Thermo couple pairs work at only 2-50mV and become completely unpredictable very fast.
If you like, I send you more information and an electric plan.
Best regards
Sven
I'm curious, with 4 heating units in the oven are you going to have to have a dictated 240 line other than a house hold 240, a house stove has one and you have 4 oven units to feed, granted the burners use up some of the amp's but I don't think they use as much as your oven is going to use, you may have to get a 440 line run and split it.
the welding line with 240V/80A does it handle normally. but If you have 440V threefase that is optimum....=> why heat the supply cables when you need to heat just the oven.
But remind the the beams do transport the heat outside and make for a lot of energy loss. Isolate at least with 3" mineral wool or Polyurethane for not to pass with the electric bill throught the roof, Then the wife will start to pick on you.
Sven
Shadow1100T - 1/6/2010 8:00 AM
I'm curious, with 4 heating units in the oven are you going to have to have a dictated 240 line other than a house hold 240, a house stove has one and you have 4 oven units to feed, granted the burners use up some of the amp's but I don't think they use as much as your oven is going to use, you may have to get a 440 line run and split it.
My oven is on a dedicated four wire line. Two hots, a neutral and a ground. The breaker is 60 amps and the unit pulls 50 amps. Resistive loads generally do not cause arciing since they start up graduallly. Practically every house with an oven uses a thermostat and a definite purpose contactor. My oven will hold temperature within 5 degrees F easily.
The system that Sven is talking about is one step up. Using a PID (Proportional, integrated, differential?) unit to control an SSR (solid state relay) will enable the system to virtually stabilize at any degree setting you want. Powdercoating is somewhat similar to baking bread. Set the preheat, put the item in and then wait until it's done.
Air lines tonight.
Hope it holds air.
Blow off valve pops off at 70 and back closed at 40psi.
There is enough air in the tank at 70 psi to fill the bag twice. I found a new 12 volt compressor up in the shop attic I could put that behind the seat if needed.
Peter
If I gave you the dimensions of my air bag could you give me a spring rate or load rate for different pressures.
I also started on a dolly for taking the side car on and off. The truth is I don’t have a place to keep the whole thing when it’s done. The bike is 5 feet 10 inches wide not including the handle bars and door to the shed the bike goes in is 6 feet even. I have a trailer I store some other bikes in and that door is 6 foot also. So maybe this week end I will try to see if it will fit in the shed if it not snowing I will have to try it down the road anyway. Maybe I can bolt a piece of plywood on and get the wife to sit it for ballast. Lol
I also put some blow foam where I want to build up the floor. The low spot you see is covered with plywood and all ways seemed to be full of coke bottles. This time it would be dog toys. So I’m closing it up.
If you wanted to fill the whole depression just get a piece of wood/plywood drill 3 holes in it and cover the down side with plastic wrap, weight it and slowly put the foam in, it will come out flush and have a smooth finish, if you do this cut a relief slot in one end so the excess has somewhere to go. Or put the floor in then do it.
If it isn't there already I suggest that you put a piece of plywood behind the dash for strength so if someone grabs it it won't flex,,,,but then you knew that already Huh.
The 12 volt compressors are nice and can run automatically via a presostat, but often do not last long (pure disposable plastic).
In stead of an air compressor you might think of a small neumatic piston connected to the same swing arm or tub suspension. As you ride the oscilations will pump up the system continuously, just as the former Kawa Z650 did within a few meters of riding. I always have some used neumatic pistons flying around in the shop and have that Idea of an automatically adjusting suspension since I once rebuilt a trucker's seat. It would adjust its air presure and height accourding to the roughnes of the road and weight of the driver.
Spring rate and calculations?. Way to much hastle! Try and error is easier and faster.
That truck seat had simply a bag piston like you and two 3-way valves conected to the air tank. One valve short before the top edge of travel for to blow off and another one close to the lower travel for to fill up. Playing with their position you adjusted only the height and free floating distance. The rest does the system automatically on the ride. For higher luxury you could add throttle needle valves at the excaust of both valves to adjust the blow off rates.
The SSR stuff for the oven is when you have many cycles, then the contactors or thermostates always get eaten up. And on the other hand lets me permit any -time-load-temperature- profile at very tight tollerances without overshot or ignition danger.
Have fun.
Sven
A plumbed in compressor would be a good idea IMHO because the fill rate won't be the same with a load on it, X amount of air pressure to lift X amount of load, but if you did do that it would require a one way check valve to stop bleed off, it would be handy to be able to have air to keep the Res full plus you could run a tap to plug in to top off tires when needed. for ease of hooking it up I think I would put it on the car rather than behind the seat, once the plastic is stripped off the compressor look like a model airplane engine for those that don't know, which makes it very easy to mount.
I like the plywood idea.
I just cut the extra foam off with the wife’s turkey knife, or should I say her old one now.
I love the compressor to the swing arm idea. I can see me jumping up and down in the side car when I come out in the morning and the bag is flat.
I had a leak in the air bag . Loose fitting.
I think the compressor will be needed. I think this will do the job. no plastic on this baby.
I tried a test run on the half finished sidecar dolly.
When i got the side car off the sidecar fell over. I guess it needs more wheels.
I tried a boat seat in the sidecar didn’t like it.
The wife and the kids road testing.
Are you SURE that will enough compressor to do the job? 🙂
That compressor as long it is not for an air brush looks good and will be more then enough.
Sven
ya i think it will do. it will make 160 psi if not regulated. i have a50psi switch. i will wire it with a relay so when the lights are on the pump will start.
I'm curious as to why you just don't use one of the small pumps, there slow but will maintain the pressure your going to be working at and they weigh a lot less, to be honest I thought you were kidding when you said you were going to use that pump, I've had one of the small pumps on my last 3 bikes mainly for tires, never had to use it but I sure pumped a lot of tires up along side the road for others.
The newer SUV compresors are even smaller and make an excellent work even on my wifes 4*4 once a week.
The old small plastik things we lost once and again (means 3 times in 20 years) together with the rain coat somewhere in the montains. Always before they were worn, but I never felt confortable with them. The one you show there seams to be an old goody.
The presostat you can adjust siimply by tightening the screw/nut of the preload spring.
🙂 Sven
i have this compresor its free and new.
yesterday I wanted to take the bike for a ride and try parking it in the bike shed with the car on. I backed the bike out of the garage. With the wife and I pushing we managed to get to the driveway. All set now down the driveway and out the lower road. I convinced the wife to get in and off we went. About 1/3 of the way down the drive way I realized I could not stop or steer on the snow covered ice. As were headed for the telephone poll across the street I’m trying everything I could to get control I tried to turn right no steering I tried left no steering I finally locked the rear wheel and completely let of the front , turned left and prayed. We missed the poll and ended up in the snow bank across the street. After a lot of pushing we managed to get it back on the road. We both jumper on and off we went. in the wrong direction. no problem ill just turn around at the intersection up the street. When we got to the intersection I tried to turn left still too slippery no steering. We ended up backing and pushing to turn around. Once we were headed in the right direction the wife refused to get back in. so off I went down the lower road headed out to the paved road. I finally made it to the main road that road had a couple for lines of pavement with snow between.
The bike felt good. less left and right pull then I remember. I could not feel the flex the gold wing had.The car was very light. I will need to put some weight in it. when I got back in the yard I slide down to the shed and squeesed it in the shed. The center cap on the car side dragged on the door frame while I had about 1 inch clearance at the bike bags. I will have to make that door 6” wider.
