Geris Vienna Build

Geris Vienna Build

Postby geristockreiter » Fri Jan 16, 2015 2:08 am

Hi to all in this wonderfull forum.

My Name is Gerald, i am from Vienna, Austria so please be patient with my quirky English ;)
I am also lurking around here for weeks (now for month) and felt in Love with GUS.
So here is a Photo of what have done until now:

this is th highest position of the arms.
WP_20150116_02_46_17_Pro.jpg
WP_20150116_02_46_17_Pro.jpg (1.51 MiB) Viewed 63451 times

The Hotend is a dummy, i plan th put a E3D into GUS.


I use RAMPS 1.4 and Repetier Firmware 0.83 with Mr. Sewards Settings. I have wirded up xyz and the endstops to RAMPS and i can moving the arms.

WP_20150116_02_58_07_Pro.jpg
WP_20150116_02_58_07_Pro.jpg (1.22 MiB) Viewed 63451 times


So what should i do next and how is the calibration done? Is there a HowTo anywhere around ? This is my first 3d printer build and i want the other side of "utter havoc" :D

Greetings from vienna, Geri
geristockreiter
 
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Re: Geris Vienna Build

Postby ajiau » Fri Jan 16, 2015 6:53 am

Congratulations, that's a very impressive result! I see you have the same relatively lower power steppers as I have. Were you able to get fairly fluid movement without friction?
ajiau
 
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Re: Geris Vienna Build

Postby geristockreiter » Fri Jan 16, 2015 8:49 am

Thank you ajiau. looking on your previous posts i see that my spools are mounted in the wrong direction ;)
i will correct this asap. the movement of my arms is relative smooth and i use no springs at this time but i must fairly say that my tests are not very accurate. when i open/close the arm manually with the motor installed i feel 2 points where i must use a little more force to go over this points. i dont have exact measured
this force it is only my personal feeling and the spools are mounted wrong.

Grüsse, Geri
geristockreiter
 
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Re: Geris Vienna Build

Postby timrwilliams » Fri Jan 16, 2015 8:20 pm

I agree, a good looking build.
I don't think it matters which way round the spools are mounted. Mine are the same as yours with the spool grub screws lined up with the holes in the motor arm.
The first part of calibration is the arm movement value, steps/mm. I use Marlin, but I'm sure Repetier will have XYZ values for this. These values are adjusted so that the arm movement measured across the axis of the two arm end bolts equals the value sent by software (or LCD panel). A big Vernier caliper is useful for this but it can be done using a good quality ruler.
The second part of calibration is getting bed zero values, but this is probably best done when you have a permanent hot end fitted.
I wish you good progress.
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Re: Geris Vienna Build

Postby ajiau » Mon Jan 19, 2015 1:18 am

Mine is now set up so that the grub screw holes lineup with the holes on the motor arm, however the shaft of my stepper is too short, but the screws don't even do anything! It's still better to the this way up though, because of the alignment of the thread holes on the spool. I was having problems with threads crossing over when the spool was upside-down, even though I could correctly tighten the grub screw that way round. ;-/

I still have not got repeatable movement on mine, and I thing it's mainly a problem with friction. It it worth putting grease on the thread?
ajiau
 
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Re: Geris Vienna Build

Postby geristockreiter » Mon Jan 19, 2015 4:18 am

Thank you tim, yesterday my GUS did his first cordinated move and homing. For now, i dont have screwed my spools and have only one mounted in the correct way. I did homing with g1 x-1000 y-1000 z-1000. It helps a lot that i have installed my endstops in the right way. now i think it is time to collect some values for the bed.
I dont have a problem with friction, have 3 wraps around the spool downsides and 4 wraps upside.

Gruesse, Geri
geristockreiter
 
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Re: Geris Vienna Build

Postby geristockreiter » Tue Feb 10, 2015 11:47 am

Hi,

today GUS prints for the first Time. And as you can see a first result.
WP_20150210_030.jpg
GUS print his first squirrel
WP_20150210_030.jpg (1.48 MiB) Viewed 63251 times

I am absolutly happy :D
WP_20150210_036.jpg
GUS print his first squirrel a few minuites later
WP_20150210_036.jpg (1.31 MiB) Viewed 63251 times



Greetings from Vienna,

Geri
geristockreiter
 
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Re: Geris Vienna Build

Postby timrwilliams » Tue Feb 10, 2015 1:15 pm

Thats a great looking first print. A squirrel if I am not mistaken!!
I had many distorted and failed prints before I got anything near that quality.
Good work.
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Re: Geris Vienna Build

Postby ajiau » Tue Feb 10, 2015 11:54 pm

Wow! Great work! I'm still messing around with my first arm, getting movement to be reliable, low friction etc. Still a *long* way off a finished machine. Can you answer a few questions?

- What size / model motors do you have?
- Did you end up getting the grub screws to fit to the motor shaft correctly?
- Can you please take several close up shots of shaft, spool, threading around the bolts, etc for me to use as a reference?
- How did the print turn out when finished? Any problems with scale, distortions to shape, skipped steps etc?

Overall, great work, it's really made me want to get mine finialised and working now!
ajiau
 
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Re: Geris Vienna Build

Postby geristockreiter » Wed Feb 11, 2015 11:26 am

Hi.

Thanks a lot for the compliments :D
Unfortunately a few minutes after my posting yesterday the bowdentube went out of the hotend and the print of the squirrel failed. Fixed this and tody i try to print another squirrel with scale 66% 20%infill and 0.3mm Layerheight. ABS 230°C and i put UHU Stic on capton tape. See the results here: https://plus.google.com/u/0/photos/1158 ... 0165741281

ajiau - Standard NEMA17 motors. i have to adjust the motor current in the way that when one arm is closed to the max, the two other arm are open (endstop). then i tried to open the closed arm. If i heard and see missing steps (the spools shrugs) i turn the little pot an my stepper driver a little bit clockwise.
- no
- i have a lot of photos from my build and i think i can share them via Gogle+ or so.
- the print has a lot of errors but it is one of the first prints on my GUS and iam absolutly happy with the results.

Greetings, Geri
Attachments
WP_20150211_10_16_09_Pro.jpg
2nd Squirrel
WP_20150211_10_16_09_Pro.jpg (1.41 MiB) Viewed 63223 times
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