Got an new K8400 printer, and assembled it. All axis can be driven from menu, but E axis (extruder 1) isn’t working,
Changed the polulu driver and motor with other axis.
Motor and driver does run in all axis ports.
But on ext1 and ext2 step led doen’t respond. Even tested it without stepper drive
What could be wrong. Ramp pcb dead???
Also meausured the VCC and VSS, drive gets 15V and Ic gets 5 volts.
All ok, exept the step output to the drive.
Regards Nico from the Netherlands.
Allready found the answer.
Extruder temperature must be in range before stepper does anything.
Maybe nice option, to have a menu where you can test your stepper drive manual.
Couse waiting for extruder to warm up isn’t an option.
By the way diable the printhead connector doesn’t work in the new firmware, it stays in the main menu.
It looks like an test if temp sensor is there.
There’s a failsafe in the firmware preventing cold extrusion. So the extruder won’t work if the measured temperature is under 160°.[quote=“Afterburner27”]Couse waiting for extruder to warm up isn’t an option.[/quote]Why not? You can do it from Repetier (you can set it to 170° it should be enough) or with the preheat function on the LCD. As long as it’s for a short period it won’t do it no harm.
You can also test if the stepper driver is working by swapping it with another one.
[quote=“raby”]There’s a failsafe in the firmware preventing cold extrusion. So the extruder won’t work if the measured temperature is under 160°.[quote=“Afterburner27”]Couse waiting for extruder to warm up isn’t an option.[/quote]Why not? You can do it from Repetier (you can set it to 170° it should be enough) or with the preheat function on the LCD. As long as it’s for a short period it won’t do it no harm.
You can also test if the stepper driver is working by swapping it with another one.[/quote]
Yes i know, but manual says that testing should be done with connector disconnected from head, so that it can’t warm up.
But software does not allow that. Maybe old firmware does.
But no problem, allready got it to run!
[quote=“Afterburner27”][quote=“raby”]There’s a failsafe in the firmware preventing cold extrusion. So the extruder won’t work if the measured temperature is under 160°.[quote=“Afterburner27”]Couse waiting for extruder to warm up isn’t an option.[/quote]Why not? You can do it from Repetier (you can set it to 170° it should be enough) or with the preheat function on the LCD. As long as it’s for a short period it won’t do it no harm.
You can also test if the stepper driver is working by swapping it with another one.[/quote]
Yes i know, but manual says that testing should be done with connector disconnected from head, so that it can’t warm up.
But software does not allow that. Maybe old firmware does.
But no problem, allready got it to run!
Thanks!![/quote]
As a rookie, I faced the same problem and it took me time to understand. Obviously, programming a dynamic menu on such a system is uneasy, however, i am sure that some clever experienced person will quickly come with an idea. Because checking x, y, z, ext motion makes a lot of sense after assembling the printer.