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PostPosted: Wed Oct 28, 2015 1:07 pm 
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Hello Rabi,

Tanks for the respons,
I worked uot the follw action:
- To avoid the surges on the mains, I put a interferences fliter in the mainss.
- fixed the X- and Y axes so the printhead moves very smooth.
- put the acceleration from 10 to 8 and store it in the eeprom.
- measured the voltage on the steppermotors : 0.921 - 0.914 - 0.914 . and bring the voltage to 0,914V for all tree of them.
- Improved the airflow over the board
- Started a large project (10 hours printing time).
- measured the temperature of the motors : After 5 min. 40 deg.
- put a big fan at the opening to cool down the motors.
Unfortunately, after 20 min. the machine stops with Vertex is ready.
When I bring the X-axes down, the machine stops , the screen started up again and give a tepm. of 736 deg for extruder 2.

I'll hope you have more tips.


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PostPosted: Wed Oct 28, 2015 2:56 pm 
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Did you move when the printer stops printing?
Static electricity can be a cause


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PostPosted: Wed Oct 28, 2015 4:31 pm 
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Yes in this case was that after printing.
Just the empty machine tested with the follow results:

number of retries: 10
without mitake: 3
stop moving down: 5 (with different distance)
stop moving up : 2 (stop after 20 and 25 mm)
At every stop the display switches off and restarts with incorrect temperatures on the display.

The machine is properly grounded. also the support for print bed.


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PostPosted: Wed Oct 28, 2015 6:17 pm 
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In addition to the last reply:

A recurring problem is the following.
The printing is started. At any time the movements stops. The nozzle remains at temperature. The display shows: "vertex is printing".
The product is lost. The computer does not longer responds to movements of the encoder knob.
By the way: I was printing from a SD cart.


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PostPosted: Wed Oct 28, 2015 9:03 pm 
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You could try to unplg it from the computer when printing from the SD card.


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PostPosted: Thu Oct 29, 2015 7:36 am 
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Did you check if the .gcode file on the SD card isn't truncated?


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PostPosted: Thu Oct 29, 2015 10:09 am 
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Thank you for reply.
Are there programs for testing a G-code file on truncate ?


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PostPosted: Thu Oct 29, 2015 10:16 am 
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martvanhest wrote:
Are there programs for testing a G-code file on truncate ?
Open it in the Notepad and check if the End G-code is present.


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PostPosted: Thu Oct 29, 2015 10:40 am 
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Now I think the cardreader is the problem.

I turn on the machine.
place an SD card (there is no laptop connected).
select home and then print from SD card.
The machine switches off spontaneously and one second later ON again.
I remove the SD card.
in the menu "printing from SD Card"
Without SD card he reveals the SD card files (which are not there).

To make a long story short:
the card reader switches OFF spontaneously even without printing.

I would like to exchange the defective card reader for a new one.
What is the procedure?


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PostPosted: Thu Oct 29, 2015 1:49 pm 
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Have you tried printing from your computer?
This would rule out a few other faults.


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PostPosted: Thu Oct 29, 2015 3:39 pm 
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good afternoon,

Yes I have tried to print with the usb cable on the laptop.
Everything went normal until he stops.
On the display "vertex is ready" like the start screen when you turn on the machine.
My conclusion is that the operating panel turned off and on again.
Something is almost wrong.which are the most difficult errors.


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PostPosted: Sat Oct 31, 2015 7:40 am 
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Hello martvanhest,

are stepmotors x ore y axis, become very hot during printing ?


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PostPosted: Sun Nov 01, 2015 4:52 pm 
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Hey Rolf,

Thanks for your reply,

The temperature of the the X-,Y- and Z motor is not more than 48 deg.

But I've found something els.
I removed the LCD Cardreader unit and discovered that the reset button reacts not only by pressing in.
Also by push the button sidewards, the reset works.
On the pictures of the instruction pages, you can see that the reset button is not in the middle of the hole in the sideplate. The button stucks against the edge of the hole.
So I drilled the hole to 3mm and made the assembly of the unit a lot easier by gluing the 8 spacers on the holes from the LCD-board.
Now you can mount the assembly into the machine without violence.
The reset button is free.
That was my problem: because of the vibrations during the printing , the reset button was operated and the machine stopped and started up again.
Now I'm printing a project of 10 hours. After 4 hours I can (I think) conclude the problem is solved.


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PostPosted: Sat Apr 15, 2017 11:28 am 
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ok I've been testing this over the past couple of days.

I did an initial test with using the same file but direct from the SD card in the Melzi and no reset jumper. First print was a total success and I thought I'd solved it. However, second print failed 1/3 in. Same issue where it just stopped mid print with no error.

So last night I went over the whole machine, snugged up all bolts, screws and double checked all electrical connections. The printer is on my office desk and is plugged into an extension cord, along with various other devices. They all lead back to the same socket on the wall. I decided to reconfigure everything, so that the printer plugged directly into the wall. Next to the printer I had a RPI setup with a camera for monitoring prints. I took that out of the mix for the time being. Then I ran a print with only the PC and the Printer powered on. So far I haven't had a stall out of 3 prints. 3d printing service chndigarth kochi bhopal

The only other thing it might be is some LED strip lights that I ran around my desk and above the printer. I don't know why they would be causing an issue, but it's the only new electrical addition since the problem started. Tonight I'm going to run some test prints with the LED lights on and see if it fails. Otherwise, it may have been some sort of electrical noise through the extension leads.


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