mRuss wrote:stunning results, as usual.
Yes, a master pumper. One serious machine, don’t you think “mRuss”. I plan to try to make a unit like this some day. This is a masterpiece. The wood tenons, fan cooling for the power supplies and the pump, high quality solenoids looks like Humphrey, or the same style laboratory type units. I wonder if the coil of tubing is a vacuum storage volume. The power supplies must be for the heater or the solenoids. The timer looks a bit more than an egg timer but I don’t know. I will not ask for any response from you “Tanuki-Balls”. I hope you don’t mind me speculating on your design.
My system (below at bottom) uses a honeywell UDC and a vacuum sensor with a 4-20ma output. I run the ramp soak program on the UDC “SPP” set point programming. What it looks like is that your system is entirely timer based. I dabbled in that design a time or two and maybe that is the secret. My system will not respond quickly enough to perform the vacuum ramps that you show on your table.
Yes I can control the vacuum very accurately and ramp very accurately up and down. But I am not able to drop vacuum as fast as you show, and in no way can I do anywhere near the fast ramps up either.
Look like “Tanuki-Balls” profile goes like this? (blue = minimum of any ramp, red maximum peak of any ramp , over the entire session. Lower left= starting profile, lower right ending profile. With a smooth transition between from start to finish. )
I think you have found the secret to powered pumping.
Look at it this way, short saw tooth shaped ramp provide a means for the fluid to be drawn into the tissue, then the sudden drop in vacuum allows for another wave of fluid to come in to the scrotum not blocked by the hard steady vacuum the long steady vacuum. In other words the tissue is vacuum pumped in waves that propel the fluid freely into the scrotum.
I vaguely remember that I felt that was happening to me once. I used a timer with separate on and off periods. By setting the two timers correctly, it was kind of like what I described above. The thin I have never had is fast drop. I am thinking of using 3 ports on the tube. (I have 3 on my monster tube from my system) 1 port for the main vacuum, 2 ports in parallel for vent to drop the vacuum. What may be smart is to use 2 or 3 or even more solenoids to get the best vacuum profile. About control, well you may not need it. All one b=needs to do is set up and run the timers: vacuum on vacuum off, vent on vent off and various mutation with the timer separate or like I did just one timer with the fallowing: timer 1 on time = pull vacuum, timer 1 off time = open vent (fast drop) & close vacuum. I bet the profile will look like the table shown in this thread.
Started11-2002.9-2006 I am now a MonsertTube Sr. Owner. http://forums.newart.com/phpbb/viewtopic.php?p=18763&highlight=#18763