Can the digital outputs from universal V2.75 and or V2.85 be paralled if I want to use 1 board per piezo element?by Alexander Mundy - General
Thought I would share what worked for me for underbed mounts with a very heavy (3.9 Kg) 400mm diameter bed. There are 3 sets of 27mm discs. Each set is wired in parallel with the 2 discs in each set opposite polarity. One disc in each set has the bed resting on it through a printed cylinder and the other does not. They are all wired to a universal board. With this set up the noise picked up fromby Alexander Mundy - General
But is it differential is what I was interested in? IE swing below .5VCC flex one direction and above .5VCC flexed the other?by Alexander Mundy - General
So there is an output on the 2.85 universal board that is a conditioned analog representation of the raw piezo voltage? Is 0V to VCC the range ignoring inverted polarity signal, or is it 0V (max piezo flex 1 way), 1/2VCC (piezo at rest), VCC (max piezo flex the opposite way)?by Alexander Mundy - General
Is there a step file available for the Andromeda?by Alexander Mundy - General
Quoteleadinglights Quoteexecutivul What uC version? What do you want to do with the uC? MCU is a PIC12F1830 although I am looking at a more recent PIC as well, I am using the MCU to look for the shape of a nozzle contact by looking for an unchanging signal followed by a rise where both the rate of rise and the trigger value can be programmed in. The fully evolved idea is to use it also as a miniby Alexander Mundy - General
Well it works great with bed compensation, so I'm pleased. I did try holding the bed down tight against the piezo's with various amounts of force from spring wire, that helped but didn't alleviate it and the sensitivity started dropping off at a certain point.by Alexander Mundy - General
No luck with eliminating the usual problems with underbed sensors (teeter totter and variable sensitivity). I tried supporting the bottom of the piezo's solidly since I designed the mounts with a recess under them and tried spring loaded pressure from above the bed. Lessened the effects but didn't get rid of them. I went back to the recess and turned the sensitivity up. Like your video I can blowby Alexander Mundy - General
Oh, I'm very pleased with the single point probing results. I need to change my design to eliminate the normal teeter totter effect of probing outside the triangle of the sensors without a rigidly mounted bed. With the FSR's I went to only probing in a line from center to a sensor. I was hoping the increased sensitivity would let me probe outside the triangle, which it helped alot but it's stillby Alexander Mundy - General
Preliminary probing results of my underbed mount piezo's: Sensitivity set to where moving carriages do not light LED. (Note I hadn't adjusted config.g for new bed height) Moving probe cold at center (moves around outer portion of bed between probes): Bed probe heights: -1.671 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -1.659 -by Alexander Mundy - General
Printed these mounts for underbed on my delta to replace the FSR's. Black parts are CF PETG and white are 40 hardness TPEE. Should I install the piezo's as shown or with the solid metal side against the plunger or does it matter? Don't have time tonight to install them and test, but will report back when I do. Edit: mockup showed I designed the plungers a little too tall so have to reprint theby Alexander Mundy - General