Just turned the rod around above the hot end fan and it stopped it dead put it back and it is running fine. I believe I have had this problem early on with the Delta Effector I had several prints ruined by the hot end fan stopping mid print. I think i just got lucky when i put it together last since it has been a long time back to my last filament feed failure. Thankfully that hot-end fan is pretty loud so i can hear if it quits. I t would be nice if Escher or who ever created the original part cooling design would create something using a 50mm blower instead of a fan. The blower is much more efficient and quieter at the required speeds. I have looked at it several times and it seems like either I lose a significant amount of print area or I need to design a very convoluted path to put the blower above the effector.

@pta00066:

With my DELTA SMART EFFECTOR I just had the same thing getting a brand new 24v 40mm part cooling fan installed per the instructions with the fan mounting 3d parts as provided. Every time I got the fan within 5mm of the mounting position the fan quits. I swapped one rod end for end per Carsten and the issue went away. Tested fan off the printer with a 8mm strong magnet and I could stop the fan from 19mm away if I placed it in just the right location. The 2 wire fan I used in the past seemed immune it died I suspect from the magnetic field effect but don't know I tried it with a bench power supply and it was a done. I don't have any others to test right now. This is a 40mm 3 wire fan with only the power leads attached.

Thanks, Ron

With my DELTA SMART EFFECTOR I just had the same thing getting a brand new 24v 40mm part cooling fan installed per the instructions with the fan mounting 3d parts as provided. Every time I got the fan within 5mm of the mounting position the fan quits. I swapped one rod end for end per Carsten and the issue went away. Tested fan off the printer with a 8mm strong magnet and I could stop the fan from 19mm away if I placed it in just the right location. The 2 wire fan I used in the past seemed immune it died I suspect from the magnetic field effect but don't know I tried it with a bench power supply and it was a done. I don't have any others to test right now. This is a 40mm 3 wire fan with only the power leads attached.

Thanks, Ron

Thanks I have it working reliably now.

It was the config not sure what was wrong I reran the web configurator and the problem went away.

@dc42:

@pta00066:

…
Error reason: SyntaxError: Unexpected token a in JSON at position 65"...

By chance I just received this exact message while testing beta 12 firmware. The condition under which it happens is that the XYZ position can't be computed because it is impossible. The way I provoked it was to use very low motor currents that didn't reliably trigger the endstop switches, so that the apparent length of the homing move made by one tower created a geometrically impossible position.

I'll fix this in beta 12. In the meantime, my suspicion is that you have a delta printer, and the M665 parameters you have specified are physically impossible - in which case the problem will go away if you correct them. Please share your config.g file.

I just setup my delta with a new DuetWifi I just purchased and it has been a struggle.

I kept having JSON errors and was unable to use the web server, consistently it would switch from being in AP mode and back to being associated with my AP depending on it's mood when I would restart.

So I upgraded to 1.19beta11 following the instructions in the document. I used M997 S0:1 to do the upgrade of both firmwares.

So now it crashes with JSON shortly after opening the web page.

"× Communication Error

An AJAX error has been reported, so the current session has been terminated.

Please check if your printer is still on and try to connect again.

Error reason: SyntaxError: Unexpected token a in JSON at position 65"

So I put it back to 1.18.1 and had the same issues. I erased the firmware and reloaded using the SAM-BA tool and I upgraded to the beta again and I still have the same problems.

This is disappointing.

Firmware Name: RepRapFirmware for Duet WiFi
Firmware Electronics: Duet WiFi 1.0
Firmware Version: 1.19beta11 (2017-07-25)
Web Interface Version: 1.17+2
Web Interface by Christian Hammacher

No matter what I have done has not worked as of yet.

Please help I ordered your system because it looked to be the best integrated most complete…....