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sudden drop in table during print
Posted: Sun Sep 27, 2015 2:12 pm
by Amorese128
Can anyone tell me why the print table drops suddenly during a print? I replaced the mother board, sd card reader.
Re: sudden drop in table during print
Posted: Sun Sep 27, 2015 2:24 pm
by Matt_Sharkey
inclued in your startup gcode
if this isn't provided then the bed motor will time out after not moving for 5 minutes, which is probably the duration of the first layer.
Re: sudden drop in table during print
Posted: Sun Sep 27, 2015 2:51 pm
by Jules
Is it dropping after the print finishes, or in the middle of the print? How far does it drop?
If it is dropping after a print finishes, you can add a bit of G-code to the ending Script to take it down closer to the bottom before it cuts power. I use this code in the Ending G-Code tab of S3D:
M104 S0 ; turn off extruder
M140 S0 ; turn off bed
G91 ; relative mode
G1 Z10 ; lift 10mm
G90 ; absolute mode
G1 Z190 ; drop Z axis to just above spring
G28 X0 ; home X axis
M84 ; disable motors
M106 S0 ; stop bed fan
M108 S0 ; stop extruder and electronics fans
Re: sudden drop in table during print
Posted: Sun Sep 27, 2015 4:37 pm
by sthone
Are you printing from USB or the SD card when the drop happens?
-Steve
Re: sudden drop in table during print
Posted: Mon Sep 28, 2015 12:21 am
by Amorese128
The table drops after the first layer. I just started having this issue. It only drops 1-3 levels hot end continues going as if nothing is wrong. filament everywhere.
Re: sudden drop in table during print
Posted: Mon Sep 28, 2015 12:23 am
by Amorese128
I am printing from USB I also have a issue with SD card. I have several files on the SD card however when I click on print from SD card nothing shows up. I just replaced the mother board and SD reader. The files are still on the card because when I place SD card in my computer they are there.
Re: sudden drop in table during print
Posted: Mon Sep 28, 2015 12:29 am
by jsc
Regarding the table drop: that can happen when the stepper loses a step for whatever reason. Perhaps you have an intermittent wiring issue, or perhaps you are over extruding and the nozzle is contacting part of the print and being pushed down? I've had this happen when I tried to print with a tall print already on the bed that ran into the gantry. It can also happen under fast Z travel moves if you haven't lubricated your Z rods in a while.
Regarding the SD reader, are you super sure you have it wired in the correct orientation? Also, your SD card must be formatted as FAT, perhaps it is not?
Re: sudden drop in table during print
Posted: Sat Oct 03, 2015 3:49 pm
by MagicEngineer
I had this exact issue. At first I thought it was just a z axis calibration problem, but after resetting the z axis 3 times in 3 days I realized there was the deeper issue. It turns out that the screw holding the hot end in was slightly loose. This caused the hot end to slowly push out and hit the bed.
Re: sudden drop in table during print
Posted: Sun Oct 04, 2015 2:16 pm
by Amorese128
Ok help anyone I have replace everything motherboard, SD reader, hot end. Yet when I print the table is continuing to drop during a print ruining the print and losing a lot of filament in a big ball of nothing. I leveled the bed and the hot end is not touching the bed anywhere can anyone out there help?
sd card reader
Posted: Sun Oct 04, 2015 2:19 pm
by Amorese128
Can someone also answer why I cannot print from my SD card. My M2 is not recognizing the card and I get a error issue. There are files on the card because when I place it in my computer the files are there. When placed in the M2 they are gone.