Ebay SINTRON Kossel Mini full kit

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gkr
Hello GrAndAG (or anyone else):
What E-steps value are you guys using?
Currently, I have it as 110:
#define DEFAULT_AXIS_STEPS_PER_UNIT {79, 79, 79, 110}
But, I'm thinking that might be too high, and it's trying to force too much filament through the nozzle, than the nozzle can handle. So, suddenly midway thru the print, I see that the extrusion stops (especially on long prints). I think originally Sintron had it at 95.
Wondering what values you guys are using?
Thanks,
Ganesh

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DRTak

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dc42

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DRTak
...
Nice permutation. Here is the result.
1) 3 wires, correct connection. No pull-something resistors. "0" level will mean triggered.
Three wires connected as dc42 mentioned results in NO LED lights on for the stepper motor on the duet or duex4. However, when the endstop is triggered, the system reboots and the other red LED lights are on. Also ALL the orange LED lights are on on the duex4. NO stepper motor lights turn on for the duet when the endstop is triggered. When the endstop is released the system shuts off (all of my fans on the effector shut off).

Then either there is a short on your Duet, or your endstop board does not match the schematic here [forums.reprap.org]. As the fault goes away after a while, I'm leaning to the view that you have a a short on or near the Duet endstop connector that clears when the board heats up, probably between the STP pin and ground. Some suggestions:

1. If you swap over the X and Y endstop connectors on the Duet, does the problem move to the X tower endstop switch (which should show up as Y triggered in M119), or does it stay on the Y switch (which should show up as X triggered in M119)?

2. Use a multimeter to check the resistance between STP and GND, and between STP and 3V3 when the board is cold and un-powered (including from USB ) and the endstop disconnected.

Also for #1. I think it is odd. If I push the y endstop, the duet LED light goes off. But M119 shows not stopped? Randomly it will say at max stop if I try pushing just the Y endstop 20 times. But a majority of the time the duet web interface will read not stopped.

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DRTak
Also for #1. I think it is odd. If I push the y endstop, the duet LED light goes off. But M119 shows not stopped? Randomly it will say at max stop if I try pushing just the Y endstop 20 times. But a majority of the time the duet web interface will read not stopped.

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dc42

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DRTak
Also for #1. I think it is odd. If I push the y endstop, the duet LED light goes off. But M119 shows not stopped? Randomly it will say at max stop if I try pushing just the Y endstop 20 times. But a majority of the time the duet web interface will read not stopped.

That does sound like a fault on the Duet. I suggest you check the soldering of the series resistor (R57), also look at the resistor with a magnifying glass in case it has cracked. Then check that pin 16 of the atsam chip looks soldered on its pad.

Also you can go to the Settings tab of the new web interface (version 1.08) and select the Machine Properties sub-tab. This displays the live endstop status. Then you wan watch the status while you prod that resistor and the chip pin with a plastic tool.

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dc42
The endstop states are all showing as n/a so I guess either you haven't configured the endstops with M574 or you are using old firmware that doesn't report them to the web interface.

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dc42
DRTak, use 1.09r, and start a new thread.

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GrAndAG

Mine settings is:
#define DEFAULT_AXIS_STEPS_PER_UNIT {80, 80, 80, 95.2}
And yes, I measured it on "cold extrusion". It's perfectly provides 100mm of filament for me if I request 100mm. So, the default Sontron's "95" is correct in general.
But I'm printing with 92% fillrate, even if my filament diameter is 1.75 +-0.02 (also measured). I get better results if it's underextruded a bit. I suppose that's because nozzle hole diameter is not ideal 0.4mm.

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GrAndAG
Plastic parts on Sintron's kit are not strong and durable at all. In my printer I used only 3 original plastic parts: spool holders, extruder drive mount bracket and hot-end mount. Hot end mount was cracked into 2 halves about a month ago. And today I noticed that extruder bracket is also broken, despite on the fact that there is no force at all applying on it during printing.

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gkr
GrAndAG.

Do you mind attaching your Marlin Configuration.h file as well?

That would be much appreciated.

Regards.

• Patched "Wait for user" bug when printing from SDcard and the printer in the same time is still connected to host program, i.e Pronterface. (in both versions)
• Patched negative on-screen coordinates representation bug (this bug was in Marlin_delta2 only).
• Patched to have M666 command (software adjustment of end-stops, Marlin_delta2).
• Software adjustments of end-stops can be made in Configuration.h without enabling of EEPROM support (both firmwares).
• Patched to add individual adjustments for towers based on this thing (Marlin_delta2 only, Marlin 1.1.0-RC2 already has this ability).
• Patched "No SD card" menu to re-init card instead of showing of empty content (Marlin 1.1.0-RC2 only). For some reasons I have to do double init for my SDcard, or turn on the printer with SDcard inserted already, to normally work with it.

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gkr
Thanks, GrAndAG for the Marlin firmwares.

BTW, I have assembled a e3D Lite hot-end as per these instructions:
[wiki.e3d-online.com]

Anything, I need to worry about, or make sure I need take care of, prior to/or during the swap-out, before I can start printing with it?

I know, I need to change the following in the Marlin Config.h, and reload the firmware:

Reconfigure your firmware for the Semitec 104GT2 thermistor: In configuration.h:

#define TEMP_SENSOR_0 5

Just wondering if there is something else I need to be aware of.

Any input is greatly appreciated.

Regards.

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gkr
Hello hacker,

You may still upload the Z-probe holder design, so I can try and add that functionality, once I'm up and running with this new e3d hot-end.

Thanks.

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hacker

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gkr
Hello hacker,

You may still upload the Z-probe holder design, so I can try and add that functionality, once I'm up and running with this new e3d hot-end.

Thanks.

Sure, here it goes: [www.thingiverse.com] it also has an arm for attaching circular duct (linked from the description) in case you want one.

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Noitome
All is connected, everything is checked, double checked and triple checked. Only the wires are not neatly put away yet... But I'm scared. Scared of turning it on for the first time. Any tips? I'm going to turn it on by using a socket with a remote switch. What is the first thing I should do after turning it on? Oh I hope it's not just a poof of smoke and that was it... I'm going to meditate on this

All or any advice at all is very welcome!

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Noitome
What is the first thing I should do after turning it on?

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Noitome
exit status 1
error compiling

Any clues on how to fix this anyone? It's the part where I should be able to succesfully upload the firmware with arduino IDE

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gkr
I'm using Arduino version 1.0.6 (rather old), but works fine.