Another printer (it is a disease, once you start collecting them...)

Yeah, bowden. First time for us too.

Well now, this is cool. With Repetier firmware and a RAMBO board you can control the current to the stepper in code.. It is set in CONFIGURATION.H

That is neat. Easier than breaking out the meter and tweaking pots.

I think I need to bump the extruder drive current a bit.

 

Hey! Wheres you find a fuse ? Or is it a bent paperclip until tomorrow cant wait to see the print.

 

https://ultimachine.com/

They had them. 3 bucks for 3 fuses (Fuse 0448005.MR)
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Frankly, to stop the skipping all I had to do was remove the cosmetic panels from the side of the top and get more air in there.
The steppers are running ... quite warm. I will probably add some more DC fans on there. They have one, rather small, DC fan that cools the RAMBO and I think we need more airflow,


(edit: I called the RAMBO a RAMPS -- newb mistake)

 

https://www.facebook.com/video.php?v=10154745274366318

I still need to add some fans to the top section to keep things cool, but with the top open it is printing fine (finally)

 

and it is a noisy beast already... more fans will not fix that

but 36 inches of build volume ... Oh my!

And I guess I need to clean up the mess from building it now.
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.
.

 

Finished. I think I finally have it dialed in

 

Holy mother of delta. Tgat is one nice lookin machine ! Thank you for sharing...now where is max build size print

 

It is roughly a 12 inch circle that is 36 inches tall.

 

That would be one huge print ....DO IT!!!!! lol

 

Well, turns out the issues I was having with the extruder (effector) was really a bad extruder stepper motor.
I went through tweaking the Repetier firmware to increase the motor drive currect (like you would do with a screwdriver on the Robo) and the stepper completely died.

Ordered a few more and will tackle this again next weekend

I have gotten really good at field-stripping the effector. I can have that puppy apart and back together in no time.

 

So I took a no-name Nema 17 I had sitting around and plugged it on for giggles.
It was not quite as torquey as the stock one, but not super weak. Same crap. Skips/pop/stutters.
Could not extrude more than 50mm at a shot without a skip.

Arggh. We had even rebuilt the hotend (again) with the bowden tube pre-inserted all the way into the heatbreak. Same for the EZR Extruder.

Their support suggested another spool since that one may be OOS diameter-wise... Not buying it.

So after some pondering I thought what if we crank the heat up? I jacked it all the way to 225c ?


did a test extrude 50mm... no problems, 100mm no problems, 150mm no problems.

Well crud. I still am waiting on feedback from them, but at least I can get extrusion working. Maybe we really do just need to run it hot, but... my concern there is that PLA run that hot will be a stringy mess. Sure, I could use some flavor of PET or some nylons and not have that issue, but those cost more I like my cheap-as-dirt PLA.

Still looking into it, but that seems like a positive outcome. The replacement stepper will be in hopefully by the weekend, early next week latest.

 

I am going to print and use a Gregs Wade I suspect.
We were trying to use 'normal for teh Robo' temperatures to print and .... not getting it done

Someone posted on thingiverse a modified gregswade that works with this model so I am likely to end up there.
But.... if I stay with the EXRstruder ... flexible filaments are a non-issue ... decisions, decisions...

 

Excellent suggestion, but why not just print one?

http://www.thingiverse.com/thing:1843195/#files

Still have two working Robos and a DLP ...

 

Just an FYI. I was looking at a replacement RAMBO board when troubleshooting the issues, because .... spares.
Damn... those are non-cheap. It is almost cheaper to buy every electrical and and mechanical component for a Robo than a spare RAMBO

They are a tad pricey.