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by andrewsi
Thu Feb 20, 2020 10:56 pm
Forum: Electronics
Topic: Pinout/config/compatibility for the Tec4 graphic display?
Replies: 8
Views: 1759

Re: Pinout/config/compatibility for the Tec4 graphic display?

It's a SPI interface from the mainboard that is expecting an ST7920 chip at the other end, which is responsible for controlling the LCD from the commands and data sent over the SPI interface.
by andrewsi
Thu May 31, 2018 5:48 am
Forum: Troubleshooting
Topic: How to stop ooze from the TOP of the tec4 heater block?
Replies: 1
Views: 1767

Re: How to stop ooze from the TOP of the tec4 heater block?

After writing this, I found the manual for assembly of the Tec4 head in the downloads section. I think the problem may be that the nozzle is tightened against the heater block rather than the heat break - I don't there is a gap between the nozzle and the heater block as described, so perhaps there i...
by andrewsi
Thu May 31, 2018 5:31 am
Forum: Troubleshooting
Topic: How to stop ooze from the TOP of the tec4 heater block?
Replies: 1
Views: 1767

How to stop ooze from the TOP of the tec4 heater block?

I had to disassemble my Tec4 head in order to clean a jam. I've put it back together but a certain amount of filament seems to be oozing from the top of the heating block across the narrow section of the heat break and creating a yucky cylinder of goo between the two. I see how the print nozzle and ...
by andrewsi
Thu May 31, 2018 5:24 am
Forum: Electronics
Topic: Pinout/config/compatibility for the Tec4 graphic display?
Replies: 8
Views: 1759

Re: Pinout/config/compatibility for the Tec4 graphic display?

Solved it myself.
Add the following to the Klipper printer.cfg file:

[display]
lcd_type: st7920
cs_pin: ar16
sclk_pin: ar23
sid_pin: ar17
by andrewsi
Mon May 28, 2018 8:20 pm
Forum: Electronics
Topic: Pinout/config/compatibility for the Tec4 graphic display?
Replies: 8
Views: 1759

Re: Pinout/config/compatibility for the Tec4 graphic display?

Still hoping for an answer... Guillaume? Maybe? Please? :-)
by andrewsi
Tue Apr 17, 2018 2:52 am
Forum: Electronics
Topic: Pinout/config/compatibility for the Tec4 graphic display?
Replies: 8
Views: 1759

Pinout/config/compatibility for the Tec4 graphic display?

I am experimenting with the new Klipper firmware on GitHub, which has been working great so far. Someone's recently added ST7920 support to allow some displays to work, and I'm curious whether this is the same hardware used in the Tec4 graphical display. If so, can someone please help me figure out ...
by andrewsi
Sat Nov 04, 2017 9:30 pm
Forum: Firmware
Topic: Error in batch file for latest single-extruder Tec4 firmware
Replies: 1
Views: 1234

Error in batch file for latest single-extruder Tec4 firmware

The line that invokes AVRDUDE needs to have the ".hex" added to the filename of the firmware - as it currently stands, avrdude fails to find the actual firmware file because the extension is missing.
by andrewsi
Wed Dec 16, 2015 2:50 am
Forum: Troubleshooting
Topic: Extruder skipping, sparse print
Replies: 33
Views: 38582

Re: Extruder skipping, sparse print

NOW I'm thinking the motor is bad too. I had an extruder motor go bad a while back, and if one of the wires is intermittent this is exactly how it will behave.

Easy test is to swap with one of the other motors that's known good, and see whether the problem goes away...
by andrewsi
Tue Dec 15, 2015 7:28 pm
Forum: Troubleshooting
Topic: Extruder skipping, sparse print
Replies: 33
Views: 38582

Re: Extruder skipping, sparse print

If the fans are identical parts, then there wouldn't be a problem with that. However, you will have to make sure that you always run the airduct fans at 100% from the first layer (which I think you said you're already doing), otherwise the extruder fan wouldn't be running full tilt and then you'd po...
by andrewsi
Tue Dec 15, 2015 1:57 am
Forum: Troubleshooting
Topic: Extruder skipping, sparse print
Replies: 33
Views: 38582

Re: Extruder skipping, sparse print

Cura: 1) Just set the slider in Repetier to 100% infill (or within the Cura settings dialogs that you can get to from Repetier. 2) Most modern slicers default to leaving the fan off for the first layer (or in Cura's case, I think it's the first "x" mm of height) to promote better sticking to the bed...

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