Anyone with a Prometheus head please check in!

Discussions related to the Rostock MAX v2
geneb
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Re: Anyone with a Prometheus head please check in!

Post by geneb »

Photo gloss paper is WAY too thick. (If I'm thinking of the same stuff). Use 20lb bond notebook paper, nothing thicker than that. I've also used that thin, wispy paper that credit card receipts are printed on.

g.
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ZenOhSix
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Re: Anyone with a Prometheus head please check in!

Post by ZenOhSix »

geneb wrote:Photo gloss paper is WAY too thick. (If I'm thinking of the same stuff). Use 20lb bond notebook paper, nothing thicker than that. I've also used that thin, wispy paper that credit card receipts are printed on.

g.


Wow!

A few things...

1) It is printing (like it use to). I am not sure what happened with the whole height thing, but I use to to be able to print little cubes on/off. Yet, I always used the printer paper. I measured it with a Caliper. The paper is .10mm. I then switched to a scratch notepaper after you said the comment above. That measures .04mm.

2) I swapped PLA to Orange. Orange is my favorite color.

1+2 = success past the original issue.

I am wondering how much that .06mm gap caused issues with the previous failed prints?

Also - there was a small anomaly when printing the base. The bed temp is 60c btw. Watch the video here:

(NO IDEA WHY I RECORDED SIDEWAYS LIKE THAT - SORRY) - skip to 45 seconds in.


Thanks,
Mike

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KAS
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Re: Anyone with a Prometheus head please check in!

Post by KAS »

My apologies for the late reply.

With the geared extruder, I usually run a bit cooler on the temps as it can handle the back pressure. I would look for a good string calibration print and keep running that until you find a temp that doesn't string as much. With PLA I do get some stringing but its easy enough to burn off. Also you'll probably have to run a calibration print on each color and brand of filament.

PLA.png


ABS.png

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Glacian22
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Re: Anyone with a Prometheus head please check in!

Post by Glacian22 »

I have a Prometheus V1 on a Rostock Max V1. The Prometheus requires more pressure to extrude than the stock hotend, and I had occasional issues with skipping with the default ezstruder. I ended up moving to a geared extruder, and things have been great ever since.

That waviness is in your last vid was weird, I've never seen that before. It kinda looked like it just wasn't sticking to the bed...what brand of filament is that, and what are you using for bed adhesion?

ZenOhSix
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Re: Anyone with a Prometheus head please check in!

Post by ZenOhSix »

Glacian22 wrote:I have a Prometheus V1 on a Rostock Max V1. The Prometheus requires more pressure to extrude than the stock hotend, and I had occasional issues with skipping with the default ezstruder. I ended up moving to a geared extruder, and things have been great ever since.

That waviness is in your last vid was weird, I've never seen that before. It kinda looked like it just wasn't sticking to the bed...what brand of filament is that, and what are you using for bed adhesion?


The Waviness happens occasionally. It usually irons out on the 2nd pass through for the skirt. I am using the Purple Glue stick, two lines (horizontal/vertical) per the instructions.

UPDATE: Failure again.

My next step is to go do another Z-Height calibration, but before I did that, I wanted to run this by everyone again...

I was able to print a TREX skull. Yay! Yet, it took two tries. The first one failed at 96% on a 13 hour print. Yeah, I had said a few words at that time. What occurred was it came unstuck from the bed and was knocked over. I noticed very small amounts of unleveling. A specific movements, the Hot End would hit the side of the part and make a CLICK noise. There was nothing I could do - so I continued to let it run. I increased the bed temp some, trying to make it grab a little more - but sure enough, it broke it free from the bottom.

I printed it again, but this time I used a raft. That did the trick. It still was clicking / hitting the side of a part at various places though.

One thing it did that isn't right: about 85% complete, the layers started to visibly separate. It made it look like it was leaving "cracks" into the part. Lucky enough for me, I was able to finish the print and put some superglue on it. Else, it would easily pull apart. Yet, the rest of the entire part was perfect.

On the next part (JAW for the TREX) - I have had 3 failures. The first was knocking the part over (with raft). The next was misasligned layer. I am not sure what occurred, but the part finished. Yet, it did it on pure luck, as the right side of the jaw had a layer split. In the middle of the jaw bone, one layer moved about 1/2" towards the Z-Axis from the center. If looking straight down at the part, it would look like an over-hang kind of. Further, the layer was not attached at all. Obviously there was stringing, etc. everywhere. The last one failed with a knocked over part as well.

The area of errors are not that far OUT of the middle of the glass plate (i.e. towards the edge of the bed). Rather, it is just vertical in height.

What would cause this? The JAW (2nd piece of the TREX) is much easier to print than the Skeleton - yet it fails every time now.

Thanks,
Mike

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Re: Anyone with a Prometheus head please check in!

Post by plasma »

Did you check that you have good belt tension and that your carriages have no movement. Make sure that the tension on the belts is the same on all 3 towers.

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d1rron
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Re: Anyone with a Prometheus head please check in!

Post by d1rron »

So did you ever get this figured out? I've had pretty good luck with my Prometheus. I just ended up here from a google search for something else, but now I'm invested into the story and need an ending! Lol
"I rather believe that time is a companion who goes with us on the journey and reminds us to cherish every moment because they'll never come again. What we leave behind is not as important as how we've lived. After all... we're only mortal."-JLP

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