Any suggestions before trying again after a reset? This is my first go round changing nozzle diameter. I went from a 0.4 mm nozzle to a 0.6 mm nozzle.
After the swap I checked my extrusion multiplier (no change needed) and tuned pressure advance (I had to decrease the value a bit, but it looks spot on now).
As part of the nozzle swap, I also bumped line width from 125% to 150% in Orca Slicer (should be around 0.9mm extrusion width) and increased layer height to 0.3mm. This should put me around 22 mm^3/s of material, which shouldn’t be an issue for a Rapido 2 but this is the most flow I’ve pushed through it so far. Maybe I should bump temp a touch? I’m still at my fairly-low-for-ASA 230 that I was using with my 0.4mm nozzle.
The print didn’t move on the bed and shows no signs of warpage. There also aren’t any signs of curling on the areas that the nozzle must have hit to cause the layer shift.
The only thing that seems like a miss was having z lift turned off while troubleshooting a print quality issue. I had it set to only lift above 0.25mm (not on the first layer) and only lift below z 0mm (this probably disabled z-hop). Z hop when retracting is set to 0.2mm, which is less than my 0.4mm retraction length so it seems like changing the “only lift below below z” value would re-enable z-hop.
Generally speaking yes, with bigger nozzles and higher flow rates you will need slightly higher temps- the conduction rate thru the nozzle to the plastic is constant, but you are heating up more plastic and need more energy (thus, higher temps).
You will then also need more part cooling fan as there is more plastic bulk to be cooling.230 is much much too low for ASA, that stuff is a bit picky. Try 250.
Bah, I typoed. I’m running 250 first layer/240 following layers, which is still lower than what most usually recommend. I was running 235 pretty consistently previously. I’ll have to try printing a temp tower with the bigger nozzle. Here’s one from the 0.4mm nozzle, granted also with my prior Rapido 1 (RIP).
Below 230 or so, layer adhesion was pretty poor
Above 245 or so, I started getting a lot of very fine/wispy stringing. It basically looked like ultrafine thread and would get itself stuck in my hot end fans.
You will then also need more part cooling fan as there is more plastic bulk to be cooling.
Thanks to somewhat low chamber temps (350mm^3 printer with only acrylic panels), I’ve been keeping cooling somewhat low. I recently added some more bed fans to help my bed filter out, so maybe I can try a bit more if it starts becoming an issue.
Still try the higher temp, but bump up your retraction to counteract that. I went with the same move for printing silk to get cleaner layers, and it’s worked out really well.
