How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
Goodday,
I need to print some parts for the nextruder in pc-cf.
I see a lot about extrusion multiplier and not correct dimensions.
Now my question is. Does prusa alter this extrusion multiplier or leave it on stock 1.04?
The parts like idler swivel and idler lever need to be the right size.
But what is the right size? The size from prusaslicer?; or the size coming from the print beds of prusa?
Or the size i have afrer calibrating?
I cannot reverse engineer the bgcode for core one pc-cf parts so i don't know the settings or if the altered the settings.
Thanks in advance.
RE:
The leave it at the stock 1.04. You can open the 3mf file in Prusa Slicer and it will give you the settings they used. The only thing modified from stock appears to be the cooling.
You can get it from here: CORE One printable parts under the Model Files/3MF/PCCF parts.3mf
RE:
This is very topical for me since I had a print go horribly wrong and break the fan shroud so I'm printing a new one as I write. The old one is currently patched up with Kapton tape... What is interesting is the parts were setup for printing on a MK4S but that shouldn't really matter. I'm printing right now on a Satin plate with Magigoo PC.
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
I've printed may Prusa parts with PCCF and just used the standard structural print profile and the default PCCF filament profile. The only change I made was to switch to cubic infill
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
Did you have problems assembling some parts ?. Unlike PETG, PCCF is very stiff so I'd quessed that, for instance, pushing the smooth rods and the linear bearings into the X carriage would be challenging if you print this part in PCCF. It's already a tight fit if it's made from PETG.
RE:
I've only used Prusa PC-CF for printing spare parts. They've mostly been small (like the belt tensioner pulleys) and I successfully printed the fan shroud which is a medium sized object. Both times I used the satin sheet with Magigoo PC and the stock settings for that filament. No issues with bed adhesion nor dimensional accuracy using the default 1.04 extrusion multiplier.
My suggestion is to not over-think this and just try it out first.
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
Ok will do. 😁
I have no problems because i don't have it yet. But i don't want to waste it.
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
Did you have problems assembling some parts
Oh you bet. Getting the smooth rods into my "Carbon" Mk4S required some serious conversation with a hammer...
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
Is that part original in pccf?
then the extrusion must be set to 0.97 or something i think?
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
No, it's not. It's PETG. I just reprint all my printer plastic parts in a different color for each printer, and this one was called "Carbon", so I printed all parts in PCCF (which did make it look supercool). In retrospect I should have printed those parts that hold the rods in PETG.
Formerly known on this forum as @fuchsr -- https://foxrun3d.com/
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
No, it's not. It's PETG. I just reprint all my printer plastic parts in a different color for each printer, and this one was called "Carbon", so I printed all parts in PCCF (which did make it look supercool). In retrospect I should have printed those parts that hold the rods in PETG.
Those parts have to be slightly flexible and not rigid. An alternative would be Nylon but it's a PITA if you don't anneal it.
RE:
Well. I tried the first pc-cf print.
As i expected the dimensions of holes are way off. I can make a thread in a hole which has to be an open hole for a bolt to slide through.
Hole is 2.75mm vs the expected outcome 3.4mm (prusaslucer) vs original prusa printed part 3.1mm
I have not altered any settings except some infill raise. And reduced all speeds to 30mm/sec to save my brass nozzle.
Also the magnet hole is almost invisible.
When i open the 3mf from prusa they altered alot of settings but not extrision miltiplier. What kind of sorcery is this?
and it is printed on an mk4s vs core one.
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
Well i set the extrusion multiplier down to 0.85 and this solved it almost.
The magnet hole was still small but i could push the magnet in.
Holes are now big enough and nice and tighty.
On the first parts with 1.04 the part was at one point 2mm thick and the original was 1,75mm
Alot of difference
RE:
Well i set the extrusion multiplier down to 0.85 and this solved it almost.
The magnet hole was still small but i could push the magnet in.
Holes are now big enough and nice and tighty.
On the first parts with 1.04 the part was at one point 2mm thick and the original was 1,75mm
Alot of difference
I agree this is the correct approach. As you pointed out however, the 3MF file Prusa uses is setup for a MK4S and they leave the multiplier at 1.04 so is there something about the MK4S that produces better results that then C1? I reprinted the Fan Shroud using their settings and the holes for the screws and square nuts were perfectly sized (within reason). I didn't have any issues inserting the nuts and the blower fan fit exactly into the end with no play. I guess maybe it depends on the size of the part. I don't recall how hydroscopic PC-CF is but you could try drying it first see if that makes a difference.
RE: How to print Pc-CF parts like prusa (size dimensions, extrusion multiplier)
I don't recall how hydroscopic PC-CF is but you could try drying it first see if that makes a difference.
I would not try printing PCCF without drying it first.