Most of you Delta Kits users know that too little resin (below point B) will result in a decreased amount of pressure.
In the past few weeks I've encountered a few stubborn breaks (mostly combination breaks with small-radius centers) and tried adding more resin inbetween cycles in an attempt to displace the trapped air.
Does more resin = more pressure?
I always make sure that the end seal is at least completely filled with resin (between points A & B), but is there an advantage to filling it any higher?--- or am I just wasting resin?
WOW. You sure have the illustration thing nailed. Nice Job.
If you have sufficient resin to perform the repair. I say no to more resin equals more pressure. Pressure is a result of force applied on a substance weather static or dynamic and in the case of our injectors, the inside diameter of the of the tip seal is a factor as well.
Now if you do not have enough resin in the injector to allow constant contact with the injector plunger in the pressure cycle, you will not be generating any pressure and therefore may not completely fill the break.
To much resin on the other hand is just that a waste. I use the old style glass dropper pipets and like to fill it to just slightly past the radius at the tip. On the rare occassion I have a chip that likes to drink I unscrew the injector in the pressure position and add resin as needed. Then reinsert the injector plunger in the vacuum position and carry on. I think point points A & B on your illustration was meant to be the channel for a UV mini shield.
Take what I have said with a grain of salt as I am surely not a fluid dynamics expert. I am sure Brent can expand more on the design of the injector and seal.
I'm not sure I can add anything to what SGT has already said, but I will put it in my own terms.
Resin above point B does not increase pressure, but you do want the resin level just slightly above point B due to the fact that as the break is filled with resin and the air removed, the resin level in the seal will drop. When the plunger is placed in the vacuum position it allows reserve resin from above point B to refill the seal.
In order to get the best possible repairs from the Delta Kits I-100 the seal must always be full when the plunger is in the vacuum position. This it what makes it operate on a true hydraulic basis, and is one of the key factors that separates it from all other systems.
I do use just a little more for extreme vertical applications, but on most repairs I use about the same amount of resin as SGT, and rarely ever have to add more. It only takes 2-3 drops to fill the seal, but we recommend 7 drops (just above the radius of the tip of the glass dropper) to compensate for vertical applications and to assure there is enough resin to re-fill the seal during each vacuum cycle. Any more than that is wasting product.
Does your drawing program allow you to split and rotate the image? I'm not very good with such things, but the engineer that we currently work with provides our drawings in a format that allows us to view parts from every direction, and allows us to split the part open for an inside out view. He also provides us with a viewer, so even thought I don't know how to draw the part, I can manipulate the view of the completed drawing. It's all very mysterious, but very cool to me.
Thanks for the replies, guys--- that clears things up.
gt_repair, the program is called paint.NET, a basic imaging program you can download for free.
Brent, the program can only produce 2D images, so any kind of rotation is not possible. It is possible to create an artificial 'split-view' with layering.
