Head Strike on print

Topics around mechanical design, controller and electronics. Mods & hacks welcome.
Alc28
Posts: 8
Joined: Mon Sep 26, 2016 4:07 am

Head Strike on print

Postby Alc28 » Tue Oct 11, 2016 4:54 am

I am getting head strikes on the print. The nozzle height to the plate is already calibrated to 20mm gap. Could it be the flowrate?



Thank You
Albert
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HeadStrike_01.jpg
HeadStrike_02.jpg

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Vicky@Raise3D
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Joined: Fri Mar 25, 2016 3:54 am

Re: Head Strike on print

Postby Vicky@Raise3D » Tue Oct 11, 2016 7:15 am

Try these two settings:
1.png


Z hop for avoiding nozzle scratch on print when moving.
Avoid Traveling Through Holes for reducing the strings inside the characters.

Alc28
Posts: 8
Joined: Mon Sep 26, 2016 4:07 am

Re: Head Strike on print

Postby Alc28 » Tue Oct 11, 2016 10:18 am

Thank you very much for the reply Vicky. The Zhop and avoid holes should work but they increased the time to print significantly. Is there a way to reduce the time?

Thank You
Albert

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Vicky@Raise3D
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Re: Head Strike on print

Postby Vicky@Raise3D » Tue Oct 11, 2016 10:24 am

The estimated time of Z hop is not correct. It will not add such much time of printing. Normally only extra 5% to 10%.

Alc28
Posts: 8
Joined: Mon Sep 26, 2016 4:07 am

Re: Head Strike on print

Postby Alc28 » Wed Oct 12, 2016 10:02 am

The Zhop and Avoid holes option made the printing situation better but its still scraping the surface. I am wondering if the nozzle height is the cause. The nozzle is set at .20mm (2layers of copy paper). I also noticed there is no lock nut on the Z screw just spring on it. More problems came up. I do not know if the head strike cause it. The X axis rod is starting to make noise when moving from right to left. It might be going out of alignment?

Thank You
Albert

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Vicky@Raise3D
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Joined: Fri Mar 25, 2016 3:54 am

Re: Head Strike on print

Postby Vicky@Raise3D » Thu Oct 13, 2016 5:42 am

Would you like to share a before and after picture to compare and check the current problem?

Please check whether the nozzle height has been changed with the paper. Based on our test, the Z screw is tight enough.

Turn off the print and hand move the print head. Check whether it feels more stuck from right to left than left to right.

Alc28
Posts: 8
Joined: Mon Sep 26, 2016 4:07 am

Re: Head Strike on print

Postby Alc28 » Thu Oct 13, 2016 10:04 am

I adjusted the z height using a business card and its much better now. I still hear scraping sound but there are no visible scraping marks on the print. I always put the top cover on when I print. Is it possible with trapped heat in the chamber cause the scrapping problem? I tried to move the print head on the x axis and found out its more stuck from left to right.

Thank You
Albert

Alc28
Posts: 8
Joined: Mon Sep 26, 2016 4:07 am

Re: Head Strike on print

Postby Alc28 » Thu Oct 13, 2016 10:32 am

What is the difference between the 2 printer profiles: Raise3D N2 Plus and Rais3D N2 Plus V2 Hotend? I have been using the Raise3D N2 Plus V2 Hotend all the time.

Thank You
Albert

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Vicky@Raise3D
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Joined: Fri Mar 25, 2016 3:54 am

Re: Head Strike on print

Postby Vicky@Raise3D » Fri Oct 14, 2016 2:39 am

It depends on what filament are you using. If you are using high temperature filament, the top cover is necessary to hold the heat and avoid shrinkage. If you are using normal filament, like PLA, please take off the top cover. PLA needs more cooling. Or the shaping will be not good.

Please check this list first.
X and Y axis check list.pdf
(205.63 KiB) Downloaded 36 times


There are a little difference between V2 and no V2, like flowrate, temperature. Please choose the type of hotend on your printer. If your printer is not a very early one, it should have V2 hotend.

Alc28
Posts: 8
Joined: Mon Sep 26, 2016 4:07 am

Re: Head Strike on print

Postby Alc28 » Sun Oct 16, 2016 11:05 am

I did the X and Y Axis check list and the screws are all find. But the x axis is still stuck pushing from left to right. How do I check the alignment of the X and Y axis and fix them besides checking for tightness of the screws.

As for the scrapping issue, it still present. I bought a feeler gauge to accurately set the height at .25mm but its still scrapping. I am running out of solution ideas for this issue. Anyone who had this issue before?

Thank You
Albert

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Vicky@Raise3D
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Joined: Fri Mar 25, 2016 3:54 am

Re: Head Strike on print

Postby Vicky@Raise3D » Mon Oct 17, 2016 7:18 am

Are you printing with PLA? If so, have remove the top cover and taken off the bottom fan cover?
2.jpg
1.jpg


For the rod stuck problem, please shoot a ticket on our support system. We will set a one-to-one help ticket for you there.


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