Help needed - loss of y accuracy

Any topics that don't fall into above categories. Please note that your thread may be moved to other discussion boards.
caxton3d
Posts: 29
Joined: Tue Dec 27, 2016 1:59 pm

Help needed - loss of y accuracy

Postby caxton3d » Tue Dec 27, 2016 2:35 pm

I have just had my printer a few days and have failed to make a satisfactory print with the part shown.

Image

The problem that I have is that the y axis walls are horribly jagged.

Image

Does anyone have any experience of this in the past? What surprises me, (although I have no experience of previous printers to make a comparison) is that when the printer is making high speed quick moves filling in a small area, it appears to shake quite a lot.

You can see by the smoothness of the main body curve that both the x and the z axes are perfectly aligned, it is only the y axis where the problem seems to occur.

Thanks in advance,

Best wishes for the New Year,

Barry.
Last edited by caxton3d on Tue Dec 27, 2016 7:46 pm, edited 1 time in total.
Pattern making for the restoration of vintage Dennis Fire Engines

checktest
Posts: 51
Joined: Fri May 13, 2016 5:35 pm

Re: Help needed - loss of y accuarcy

Postby checktest » Tue Dec 27, 2016 4:37 pm

Try to move the print head by hand. Is it loose in the Y direction? Maybe one of the fasteners on the pulleys has come undone? Check your belts, are they tight?

User avatar
walshlg
Posts: 1022
Joined: Wed Mar 23, 2016 12:01 pm

Re: Help needed - loss of y accuarcy

Postby walshlg » Tue Dec 27, 2016 4:44 pm

also see if it is sticking - mine seemed to stick when the belt pulley alignment was off. ANother thing, try printing more slowly, eg 20 mm/sec. Do test cubes come out ok?

caxton3d
Posts: 29
Joined: Tue Dec 27, 2016 1:59 pm

Re: Help needed - loss of y accuracy

Postby caxton3d » Tue Dec 27, 2016 7:43 pm

I checked the belt tension using a CLAVIS optical tension meter - all 4 belts were around 45Hz.

Image

Not knowing what the correct tension should be is a problem, but being consistent I would guess it must be right. What value of tension do Raise3D use?.

I have checked all the pulley set-screws and they seemed tight, and there is not any 'slop' which can be felt. I am printing a new test cube now with a pyramid on top, so we will see how that turns out.

Can anyone direct me to the procedure for cleaning out a blocked nozzle?

Thanks,

Barry.
Pattern making for the restoration of vintage Dennis Fire Engines

User avatar
Vicky@Raise3D
Posts: 1721
Joined: Fri Mar 25, 2016 3:54 am

Re: Help needed - loss of y accuracy

Postby Vicky@Raise3D » Wed Dec 28, 2016 11:06 am

Please check the couplings.
Please check whether Y coupling is loose connections. If so, that will cause such problem.

Here is the instruction video for nozzle:
https://www.youtube.com/watch?v=o-3GuO_eiRA

If it does no help, you need take the whole hotend apart to check whether there has something block inside.
Here is the instruction video for disassembling:
https://www.youtube.com/watch?v=Q3EaDHNdlKU
You can directly throw nozzle into fire to melt all the filament inside.

And also assembling:
https://www.youtube.com/watch?v=hobwePlokQc

caxton3d
Posts: 29
Joined: Tue Dec 27, 2016 1:59 pm

Re: Help needed - loss of y accuracy

Postby caxton3d » Thu Dec 29, 2016 8:47 am

Vicky, thank you for your reply. Can you tell me where the couplers are?! I cannot on initial looks actually see the axes drive stepper motors. Is there an exploded picture available showing all the major components?

Thanks, Barry.
Pattern making for the restoration of vintage Dennis Fire Engines

User avatar
Vicky@Raise3D
Posts: 1721
Joined: Fri Mar 25, 2016 3:54 am

Re: Help needed - loss of y accuracy

Postby Vicky@Raise3D » Fri Dec 30, 2016 2:21 am

Hi Barry,

I'm so sorry that I don't have exploded picture of our printer, but I can show with photos.

The X's coupling is at the rear, left corner of your printer.
X.png

You can see it from the left side of the printer.
X1.png

If you want to touch it, you may need to remove the left side trans cover.

The Y's coupling is at the rear, right corner of your printer.
Y.png

You can see it with right side door open.
Y1.jpg

caxton3d
Posts: 29
Joined: Tue Dec 27, 2016 1:59 pm

Re: Help needed - loss of y accuracy

Postby caxton3d » Thu Jan 05, 2017 12:29 pm

With the y axis coupler tightened up (one screw was quite slack) the result is this;

Image

An absolutely perfect print!

Thank you!
Pattern making for the restoration of vintage Dennis Fire Engines

User avatar
walshlg
Posts: 1022
Joined: Wed Mar 23, 2016 12:01 pm

Re: Help needed - loss of y accuracy

Postby walshlg » Thu Jan 05, 2017 5:46 pm

Nice, makes me want to go check all the screws on my machine before next big print!


Return to “Others”

Who is online

Users browsing this forum: No registered users and 1 guest