Steves69LS3;n79945 said:
I think that the needle profile plays a big part in fluid tip size design. I've seen really sharp 1.3's and really blunt 1.3's.
The depth of the needle drilling in the fluid cap and so on.
So what im thinking is even though the satas opening is bigger than what is stated at 1.3
Depending on needle profile and fluid cap it may be designed to spray like a 1.3
Or im just drunk
Hey Steve, just a quick follow up on this.
I took a look at the nozzle and needle today. The final fluid passage in the nozzle is tapered, it is at it's narrowest right at the outside face of the nozzle. It gets bigger back inside the nozzle, a gradual increase in diameter for about .140" length, then she's opens up far beyond any metering effect the needle could have. The needle is fairly blunt but it looks to have a really long range in flow control from closed to wide open. Some needle and nozzle sets on other guns are more like an on-off switch with it either being open or closed and with maybe .050" needle travel worth of actual metering ability.
I would say this sata meters fluid flow for about 80% of it's needle travel from fully seated to wide open. It looks like mine has about .200" of needle travel from seated to full draw.
.165" of it's travel puts the tip of the needle flush with the inside of the final fluid metering passage. Which at that point I would consider the gun pretty much wide open as far as fluid flow goes. The needle will travel another .035 beyond that point on a full trigger pull.
On my gun, this all equates to two full turns of effective fluid metering (from closed) I would say that anything past 2 full turns out from a seated needle probably doesn't do much. My gun actually only has another 3/4 of a turn past that point and the trigger bottoms out anyways (which is where the .035" of over travel comes into play).
I would say the inside of the nozzle is sort of a 2 stage forcing channel, the inside of the nozzle throat is around 3/8", then reduces abruptly down to about 1/4", then it does a gradual funnel down to around .095" which is where the final .140" length of fluid metering starts, then funnels even more gradually down to the .060" opening at the outside face of the nozzle. When the needle is fully seated, about .025" of the needle hangs out of the fluid nozzle face.
My thoughts are that this is a 1.5 with 1.3 printed on the nozzle.
And I can't wait to use it. Lol!
I also have the new Iwata WS400EVO on my desk, local rep just dropped it off. It has a 1.3mm Fluid nozzle on it, which measures an honest 1.3.
Lol!
