I found that using an op amp comparator board made tuning much much easier. I initially ran without it and it does work if everything is tuned perfectly. However I found that the FSRs would drift over time. The FSRs are made of two conductive layers spaced apart by a very small distance. When the FSR is pressed the two layers flex and touch, with a low force the contact between the layers is poby Moriquendi - General
I used a print head FSR based levelling system on my kossel mini and it worked very well with a couple of caveats; Using the FSR connected directly to my smoothieboard did not work well for me, I used a very simple op-amp comparator to convert from an analogue to digital signal. I could also adjust the trigger point on this circuit. I used three FSRs because, at least with a delta, when you proby Moriquendi - General
Thanks for the response, As it's currently setup the PSU is remote from the printer and unfortunately I didn't think to run a seperate ground wire for the 5v supply. There are four 16awg wires for high current (+12v, +24v and 2 GND) then some smaller wires, one for +5v and two PSon signals. Ground for the edison is tied into one of the two 16awg GND wires at the power in connector of the Kossel.by Moriquendi - Controllers
Does anyone have any experience with problems caused by the PWM switching of a HB? I'm running a Kossel Mini with a Smoothieboard and an Intel Edison (Octoprint). I recently upgraded to a 24v, 20A PSU that also supplies 12v 20A and 5V (it's a pair of modified server PSUs). The HB and Hotend both run off 12v while the steppers are on 24v. The Edison runs from the 5V supply and there is also a 5Vby Moriquendi - Controllers
Hi Frank, Perhaps my explanation isn't very good, I don't want to generate a map per printed object rather to have a map for the print area/volume of the printer. Moriquendiby Moriquendi - Firmware - experimental, borrowed, and future
TL,DR... Rather than calculating coordinate translation on the fly is it possible or desirable to have a translation map or algorithm in logic where we could plug in cartesian coordinates and get values for the positions of the various steppers in whichever geometry of printer we're using. Last night I ran across the Cypress PSoC line of chips, essentially a PSoC 5 is a Cortex M3 cpu sitting inby Moriquendi - Firmware - experimental, borrowed, and future
I've not tried it but common wisdom is that the hot end has too much goop/stray plastic on it to make effective electrical contact. I did try using FSRs but they're too temperature sensitive to use with a heatedbed at ~120c. I tried all sorts of methods of isolating the FSR from the heatbed but to no success. My current system uses tactile switches but I use a lever system to amplify the movemeby Moriquendi - Let's design something! (I've got an idea ...)