Moving Your CF Nylon Slicer Profile to a New Printer: What Transfers and What You Retune

You spent two weeks dialling in PA6-CF on your old printer. Corners are crisp, walls are glassy, parts fit. Then the new machine shows up, you load the same spool and the same profile, and it prints like trash: blobby seams, gappy top layers, a first layer that either squashes or floats. Nothing about the filament changed. Almost everything else did.

A slicer profile is two things stacked together: material facts and machine facts. Carry the first set over. Rebuild the second.

What Actually Transfers

Material-side numbers travel with the spool, because they come from the polymer and not the printer.

The nozzle temp window moves with you (275-290°C for PA6-CF, 285-300°C for PAHT-CF). So does the bed band, 80-100°C, and the chamber target, 50-60°C on tall nylon. Drying stays identical: 80°C for 6-8 hours, then straight into a dry box. Part cooling transfers too: for CF nylon, a floor of cooling and never a blast. Same for the material's flow ceiling, roughly 12-18 mm³/s on a 0.6 nozzle, and a layer height range of about 0.2-0.35mm.

What You Always Retune

Machine-side values come from geometry and motion, and they are worthless on new hardware. Pressure advance, retraction distance (0.4-0.8mm direct drive, 2-5mm through a long Bowden path), input shaping, Z-offset, rotation distance, max acceleration. Copying a pressure advance value from a Bowden machine onto a direct-drive head is the fastest way to pinch corners and starve the tail of long moves.

The Retune Order, About Thirty Minutes

Run these in sequence, because each one breaks the next if you skip ahead. Rotation distance first. Flow ratio off a single-wall cube second. Pressure advance third, typically 0.03-0.05 on direct drive with 0.6mm CF nylon. Input shaping fourth. Retraction fifth. Z-offset and the first layer last, since nozzle pressure quietly decides how much that first layer squishes.

Save Two Profiles, Not One

Keep a filament profile holding only material facts and name it PA6-CF BASE. Put every machine value in the printer profile. Next time a machine lands on the bench you build a printer profile and inherit the filament. No guessing which numbers were yours.

Log each spool too: date opened, dry time, temp and pressure advance that worked. That page saves you a tuning session later.

Print Three Coupons Before a Real Part

A 20mm cube for flow and corners, a 60mm bridge for cooling, an 8mm tower that shows how a small part handles heat soak. Twenty-five minutes total. If one fails, you fixed it before burning 200g of nylon on a bracket.

One warning: never tune around wet filament. A spool that has taken on moisture pops, strings, and reads exactly like pressure advance error. Dry it first, or every number you write down is wrong.

What We Use

We keep TINMORRY PA6-CF loaded for profile work because the spools run consistent batch to batch. You are tuning the machine, not the roll. If the new machine is a high-temp enclosed unit, the QIDI Plus5 runs a 370°C nozzle and a 65°C chamber, which is what CF nylon needs to hold shape on tall parts.

Affiliate disclosure: some links are affiliate links — you pay the same price, we earn a small commission that keeps our testing free.