Voron Clone Nozzle Situation - Sovol SV08 Update 

They should send the new nozzle to everyone who ordered the printer. That would be a PR win. The least they could do is send the new nozzle to anyone who asks for it.

I would prefer a threaded nozzle. Lessen the chance of it falling off. Chc pro been good so far. Next will be trying a TZ-V6.

I swapped my SV08 over to the bambu knockoff hotends. It was a really simple swap. The peace of mind and hardened steel nozzle was well worth it.

While looking at the spare nozzle one simple cheap fix would be to add a 1.5mm lock screw to the nozzle before press fitting.

The problem with the hotend is the manufacturing tolerances. Most people are having fails printing Petg and not other high temp materials just for the fact that most of the printers sold are not enclosed. If not would also see a lot of this problem with Abs etc, because the higher the temp the more it expands and so makes it easier for the nozzle to fail in such way. If the manufacturing tolerances were better you shouldn’t have issues up to 300c hotend temp like most press fit nozzle/hotend designs are rated to.

Hey. Holding together the PTFE and the cable harness of the extruder, what are you using, zip-ties?

I had exactly the same problems a few days ago, I have only printed PCTG since I got the SV08 (about 50 hours of printing) and yesterday the nozzle slipped out and scratched the whole build plate. Sovol responded immediately (a few hours later) and I get a new hot end, a new build plate and a new nozzle. They also wrote: "We have updated this nozzle and it is expected to be sent to you at the end of this month." So I think the new design of the nozzles is already ready.

i can tell you now, without going past the 1.4minute mark, 100% of the issue is the fact that the nozzle is "press fit" into aluminum. Press fitting + pressure + dissimilar metals with dissimilar thermal expansion rates == problems. Ir really doesn't matter if it's a "clone" or not, you're press fitting steel into aluminum. this is already a bad idea, because one of them is very soft. On top of this you're doing so in an environment that will see thermal expansion, and high pressures under load.... It really doesn't take an engineering genius to determine this is a design flaw.

I have no problems with PETG from Sunlu and Prusa so far. I use it all the day. Nozzle is fine.

Remember the revo only flows like 11 mms. The high flow can do 22ish.

No problems with petg, not raise your temp on petg about 5c to 10c

I had to refund my SV08 order due to a many months delay was just too much down time for me. My experience with their customer support was very similar, just give them a day to respond to an inquiry and they were really good, refund was very fast and totally painless, just ask and get it. I'll certainly be getting one of these in the future when I can just order one.

@8:00 What do you mean 'no spares are available'? You can simply order spare nozzles or a complete tool head on the Sovol website..

I just looked and they did not allow my post of 3 stars to be put up online. What a rip off they do not want the truth to be out.. I am printing with petg and am thinking to stop. I love my printer just not sovol since they have to approve your post before it goes live. I am 70 years young and have been an electronics engineer for over 45 years but now retied. I own 6 creality printers and thought it was a good idea to get a cheap voron since money is now tight. anyway keep up the great work.

If you have a large print with a lot of long straight lines or circles, independent of acceleration, the effective volumetric flow rate at a given set feedrate is going to be very similar, so if it were that, the hotend-nozzles would be disassembling themselves just about the same. The acceleration on the T300 isn't that low. The max movement speed is not reached (at all) but you run into max volumetric limit within like a centimetre or a couple of start of acceleration, which stops it from going full speed. I think the acceleration itself is a contributor to peak nozzle pressure since every time you accelerate or decelerate there's that pressure buildup. Without pressure advance or with undertuned advance, there would be pressure buildup on deceleration that pressure advance is preventing. Pressure advance isn't tuned to pressure, it's tuned to flow, to achieve the consistent flow in time for the corresponding XY movement, so on acceleration, it ramps up pressure to make up the flow. So at higher acceleration values, the PA incurred pressure is correspondingly higher. Now you look at your calibrated K-values for pressure advance. You will find that ASA, ABS and HIPS have a low value, PLA has a slightly higher value but not by much, and PETG has twice as high value on 0.4mm nozzle. Curiously on larger nozzles the difference is smaller, i wonder why? PETG has really weird flow properties. It's called linear advance in other firmware because the amount of motor steps additionally emitted (to advance the extrusion motor) is a linear factor (K-factor) multiplied with the desired change in extrusion speed (extrusion acceleration). Now it's really difficult for me to reason what sort of pressure relationship occurs when you quickly double the effective amount of material supplied, it could be much more than double the amount of pressure. After all you can put 1 litre of water into a 1 litre bottle at atmospheric pressure, but if you put 2 litres of water into that bottle, it wouldn't be at double the atmospheric pressure, it would be at an unimaginably high pressure. When you open a bottle of soda, it's got maybe 3atm internal pressure keeping the gas dissolved, but there isn't 3 litres of water in there, you know? :D Oh btw sorry for extra confusion, the base for the values is different all over the place, the factor and calibration value are not the same. It's almost beyond human comprehension. Maybe i'll understand it properly someday.

Kinda proud and kinda sad to see a clip of my failure on here

im hoping that putting in an E3D volcano with a smaller heatsink shouldnt be too difficult

I wouldn't say printing pressure is higher with PETG which would indicate via stickiness in a friction test, but the glycol portion does expand more versus other polymer formulas. At any rate, I've been on the fence about this printer versus something like the Qidi max 3. I'm mostly a resin printer but have a few project FDM machines that aren't reliable, and need one that is for mold-making with higher-spec materials. I've been leaning towards the 'enclosed' option of the SV08 for the open-source nature mostly, as I could see it being Ender-like in longevity. That Revo mod is amazing to see already and I'd be onboard to swap to one right out of the box. Availability of hardened nozzles for filled/abrasive materials is also a consideration against the SV08 presently.

Personally the idea always replace the nozzle immediately, and hotend almost immediately anyways on a new printer.

I just got my Sv08 on Tuesday and the spare nozzle that the printer came with does not appear to be the same as the ones having this issue.

i know i just commented on your other video, but i think it would be awesome if Sovol decided to thread their nozzle to allow for V6 or V6 Volcano nozzles

I'm very interested in the SV08, thanks for explaining this issue. Please do more videos about this printer.

Thank you so much for the updates!

Mine just did this at 270c! destroyed my plate AND my bed

Could this be the reason why orders take so long to be deliverd I orderd in may and did not got my printer yet.

Unless you enjoy dealing with all sorts of problems popping up and getting in the way of you actually 3D printing, I never recommend getting any printer until it has been out for at least 6 months to a year. By then you should at least be able to find out what the quirks are, and in many cases, those problems may have already been addressed. It's great having cutting edge tech, but not if it causes complete failures because so many companies put 3D printers out without doing enough (if any) serious testing.

Thanks for the follow-up! From a technical point of view it's easy to fix the issue by only updating/changing the nozzle. It doesn't require a different hotend. Your voice over is distorted bytheway. sounds like clipping.

I wonder if a high temp retaining compound would help when pressing the nozzle together

You can actually stock nozzles now, they are available to order.

Glad Sovol is sending you out new nozzle & plate. I see there is a Revo upgrade will be looking into that 4 sure. Thanx 4 da update Bud Keep them vids coming Cheerz.

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