Hi.
I’m using my Velleman K8400 printer for ± 6 months. But I have a big problem right know.
Today I received new 1.75mm PLA. I just replaced the wire and will load the filaments. But when I will load or unload the filaments the printer reset himself.
It’s always when the printer will make the comment to go down. I upload a little movie.
Who knows what I can do ? I checked everything, but everything looks oke.
Hi,
First try the sequence : restore failsafe/store memory. If it doesn’t work then try reloading the firmware, it might be corrupted.
Hi Raby. Thx for your fast reply.
I try the 2 options, but those did not help.
I was using the old fireware: M1-V1.1-H1
I just uploaded the new version: M1-V1.4-H1
I only have the problem when I try to load or unload the filaments true the LCD screen. The other options all looks fine.
Auto home works and than I can move the axis true the LCD and PC. Also with my PC I can move the plate downstares.
But when I will load my filament the printer reset himself when he move the plate downstares. What can I do ?
Try swapping the Z stepper driver with another one. Also check if the wires are correctly plugged.
You mean this ? :
This is a picture from the internet. Not from my printer 
[quote=“mich777”]You mean this ? :[/quote]Nope I mean the small chips pointed by the probe.
These are the motor controllers. Swap the one for the Z axis with one other (X or Y).
This is confusing.
The picture you posted is a K8200.
@Wrong Way.
I know, sry for that. I tought it was the motor himself.
I changed the Z stepper driver with the Y driver. But still the same problem. I also checked every connection on the hardware.
Why does it make such a horrible rattling noise??? My first assumption would be a burned Driver, when you inserted the other one like you said you tried did it also rattle like that? If so somethings wrong with the stepper motor IMHO.
First Hunch after watching the video: Is the bed completely upwards? Try turning it manually down a bit, because at first it will home… But if its past the homing point it just runs into the printhead and start rattle like that as well. Might be a faulty Z-endstop also…
But reading everything wel you say it does auto-home correctly… So the whole endstop thing isn’t plausible… Might be the speed going down is to fast… And causes it to rattle? Try swaping the stepper with one of the x or y axle? See what it does then.
You could always load the fillament manually… Heat up and just push the fillament all the way down.
Sidenote: Young man empty bottles belong in the trashcan, not on the floor
Kind Regards
JeAfKe
My question is why do the end stop LEDs turn off?
Have you checked the output of the power supply?
And if you disconnect the z motor does it do that also… Simple to check…
I assume by shorting something out and reseting that’s why it starts doing the Christmas tree thing…
Kind regards
JeAfKe
Hi. Thanks for thinking with me.
@Jeafke: That noise is something with the rod ( don’t know what the correct word for “draadstang” is.
If I look good I can see that the rod is curved a bit. When I let the workplate go down he makes that noise.
So something what I fould also strange. A few times the printer is repeating resetting himself when I pluged the power in.
When I also pluged the USB cabel in the printer starts.
This is not always !!
The output V =14.8V DC.
When I disconnect the z axis and z end you would think he can not give that fold.
However when I try to load the filaments he also reset himself… So the problem is not in on the elektronics I think but in the commando Load filaments.
Is there in Belgium no shop ore person who can fix this ? I have a lot of customers who need 3D parts and can not print for more than a week at the moment.
Thanks,
Michaël
Yes hmmm…
Draadstang = threaded rod
The USB cable also powers the board, so the display will light up and work, but nothing will move. But now it sounds more like by the vibrating your connection between PSU and mainboard is interrupted. Could you check if the PSU -> Mainboard wires are connected good… Or to be sure disconnect the wires and solder the tips of the wire and connect them again.
And also disconnect the reset button, just to make sure this isn’t messing with it by the vibrations.
Kind Regards
JeAfKe
[quote=“jeafke”]And also disconnect the reset button[/quote]Also check if the reset button on the LCD panel is free in its hole. It can also be triggered by vibrations if it’s pressed by the panel.
So that’s also a reset button? I noticed it has a small hole but never actually pushed it… Try to straighten the rod cuz that’s just gonna mess up and loosen every bolt and nut on your machine eventually.
Kind regards
JeAfKe
I’m defently gonna check that when I’m home. But don’t think that is the problem.
Reson: If I open Repetier host I can move all the axes. Also the Z axe without a problem.
The printer only reset himself when I load or unload the filament. So I think that somewhere
in the programming of the movement from the load and unload option the fold must be.
Why: I can move the workplate without a problem with my computer.
So it can not be that the printer is interrupting when he move the workplate down.
Extra information about the reset:
It’s not really a reset. When I reset the printer you can see on the display that he reset himself.
When I do a load fillament first the printerhead is moving with the x and y axe. Afther that the
workplate goes down with the z axe. If the workplate go down it goes wrong. The printer is resetting
himself but if you look at the display also the display lose power and falls out for about 1 second. Than
he start again. Not really the same as a normal reset.
In repetier you move the z axis much slower I think… That’s the whole point… Fast movement huge rattle, slow movement minor rattle… Then if you say the display loses power you really should go look into the power cables to the mainboard imho…
Common sense and logic problem solving is the thing you need to do. It worked before, now the most obvious thing is that terrible rattle that gives me the creeps by only watching that video. Fix that first. Then see what it does. If it isn’t fixed try other non obvious things.
The firmware is absolutely not your issue…
BTW: You can heat up and push filament trough manually so you can print your parts for your customers… So that’s not the huge issue… I actually never use the load unload thing on the display… I just unloaded and loaded woodfill all by hand and only by heating the extruder and letting the fan blow a bit 5 minutes ago…
Kind regards
JeAfKe
I found something else.
Everything looks normal, so I really don’t understand what it can be so I just would load a filament like you say by heating up the extruder and found something strange.
When I heating up the nozzle the printer is resetting himself.
So it’s not the workplate that goes down that is the problem, it’s the extruder. When you heat that up he reset.
The ventilator and extruder 2 can I start. ( Don’t use a second extruder at the moment ). But when I start extruder 1 he reset.
Afther he reset it looks like he gives me a fold on the hardware. Look at this short movie.
youtu.be/vHH7-_n9b5Q
Is that normal that those 2 leds blink ?
Michaël
The blinking leds are the Transmit/receive leds of the serial link. It’s quite normal with the USB cable plugged in.
Have you checked the connections and the resistance on the heating element?
I think it should be around 8 to 9 ohms.