I wasn't aware the piezo wires would be sensitive to induced current, but it makes sense. tnx. g.by geneb - General
Is there any reason the piezo leads can't be really long? The idea here would be to keep the sensor board close to the controller board and just run the piezo wires through the same harness as the hot-end power and thermistor wires. (assuming a delta setup) tnx. g.by geneb - General
I wonder if a 1/4" "fish mouth" end mill would work... I've got lots of those. The reason for the nut glued to the ceramic face is to give additional mass to it in order to deform the ceramic on impact when the piezo is oriented vertically. If it works, it would allow the use of the piezo system without having to make any special changes to the hot end mount. When I can, I'll get one of thoseby geneb - General
dart16, did you bore a hole through the Piezo or did you just attach it to your hot end mount? I ask because I'm really hesitant to drill through those things. If the Piezo was oriented vertically and had a #8 nut glued to the ceramic face, it might provide enough mass to trigger the sensor properly... tnx. g.by geneb - General
That site is basically eBay for South America. The gentleman that did the MPCNC design has had problems with people printing parts and selling them on that site, using his and other folks pictures. More on it here: I did get my boards in and got one assembled - hand-soldering 0603 parts was not fun. Unfortunately, I ran out of spare time before I could test it. Hopefully next week... g.by geneb - General
Yes, that's the idea. Based on a tap test I did on Wednesday, it should work. I just need to get one of the boards soldered up so I can test it "for real". I won't be offended if someone beats me to it. g.by geneb - General
QuoteDjDemonD Okay so the idea is one part of the disc is attached to the hotend the other to the mount? Not really. The idea is to suspend the piezo between the two spacers that hold the hot end assembly to the effector platform. If the piezo by itself isn't sensitive enough to record the hit, a #6-32 nut could be glued to the ceramic face in order to add mass to that side of the device. g.by geneb - General
Here's what I was referring to by a "vertical" mount: The piezo in the photo is 27mm, so there's plenty of room in there. g.by geneb - General
My thought was to mount one between two of the mounting spacers that attach the hot end assembly to the effector platform. You could even mount it to a thin cork disk to damp out any vibration introduced by the motion system. (assuming a small weight (a nut) glued to the ceramic face would produce adequate movement when the nozzle struck the bed) I can't sketch it up right now, but I could tomoby geneb - General
Has anyone tried orienting the piezo vertically instead of drilling a hole through the center of it? I hooked one to my 'scope last night and could get what I think is a usable signal by tapping it on the edge of the disc. Maybe glue a #6-32 nut to the ceramic face in order to "pull" on the ceramic? I got the boards in from oshpark last night, but I won't be able to get them assembled for a feby geneb - General
It would be nice to have that display work with the Duet though. While the SD card socket isn't needed, it's a LOT less expensive than the interface & color touchscreen route and would allow people (like me) to leverage hardware they've got laying around. The interface wouldn't have to be comprehensive, just allow things like homing, picking a file from the internal SD card, etc. g.by geneb - Duet
Sorry for the noise - a new SD card and the board was happy. I'll try re-formatting the old one to see if it works. g.by geneb - Duet
I've got a pair of Duet 0.8.5 boards I'm having problems with. Board #1 has the 1.09b firmware (as I received it) and it won't come up on the network - the only change I've made to config.g is setting the ip address, gateway & netmask for my internal network. The board doesn't respond to pings nor does it's MAC address appear in my router. Webserver doesn't respond on the address I specifiby geneb - Duet