A black, rectangular soft magnetic accessory designed for a 3D printer with holes for mounting. QIDI X-MAX 3 Soft Magnetic Build Plate

QIDI X-MAX 3 Soft Magnetic Accessory by QIDI Tech | Qidi Tech Qidi 3D Printer

$40.99

QIDI X-MAX 3 Soft Magnetic Accessory The QIDI X-MAX 3 Soft Magnetic Accessory is a 325x325mm flexible PEI-coated spring steel sheet with a magnetic base, designed exclusively for the QIDI X-MAX...

Qidi Tech 3D Printers Filaments Accessories

Description

QIDI X-MAX 3 Soft Magnetic Accessory

The QIDI X-MAX 3 Soft Magnetic Accessory is a 325x325mm flexible PEI-coated spring steel sheet with a magnetic base, designed exclusively for the QIDI X-MAX 3 3D printer — it lets you remove prints by flexing the plate in 2 seconds, supports bed temperatures up to 130C, and costs $40.99 with free US shipping.

The X-MAX 3 Soft Magnetic replaces the stock glass or fixed build surface with a two-part system: a magnetic base that adheres to the printer's heated bed, and a flexible spring steel sheet with a PEI (polyetherimide) coating that snaps onto the magnet. When a print finishes, you lift the sheet off the magnet, flex it gently, and the part pops off — no scraper, no waiting for the bed to cool completely, no risk of scratching glass.

Product Specifications

Parameter Value
Product Name QIDI X-MAX 3 Soft Magnetic Accessory
Price $40.99 USD
Build Plate Size 325 x 325 mm
Sheet Material Spring steel with PEI coating (double-sided)
Base Material Flexible magnetic sheet with adhesive backing
Total Thickness ~0.8mm (spring steel) + ~0.5mm (magnetic base)
Maximum Bed Temperature 130°C
Surface Texture Smooth PEI (glossy finish)
Print Removal Flex-to-release (2 seconds)
Compatibility QIDI X-MAX 3 only
Installation Peel-and-stick magnetic base + drop-in steel sheet
Weight ~350g
Warranty 90 days
Expected Lifespan 6-12 months (PEI coating), 2+ years (steel sheet)
Cleaning Isopropyl alcohol (90%+), soft cloth
Filament Compatibility PLA, PETG, ABS, ASA, TPU, PA, PA-CF, PC

How It Works

Two-Part Magnetic System

The system consists of two layers. The magnetic base is a thin flexible sheet with a strong adhesive on the bottom and a magnetic surface on top. You peel the backing and stick it directly onto the X-MAX 3's heated aluminum bed. The spring steel sheet has a PEI-coated print surface on top and a bare steel bottom that snaps onto the magnetic base.

Flex-to-Release Mechanism

When a print completes, you do not need to wait for the bed to cool to room temperature. At 40-50C, simply lift the steel sheet off the magnetic base by the corner, flex it gently (bend it into a slight arc), and the printed part releases on its own. The PEI surface contracts slightly as it cools, breaking the adhesion bond. For large flat parts, flexing in two directions (X and Y) ensures complete release.

PEI Coating Benefits

PEI (polyetherimide, also known as Ultem) is the gold standard for 3D printer build surfaces. It provides excellent adhesion for PLA, PETG, ABS, ASA, TPU, and nylon when heated, and releases cleanly when cooled. Unlike BuildTak or painter's tape, PEI does not leave residue on prints, does not need to be replaced after every print, and can be cleaned with isopropyl alcohol.

Pros & Cons

Pros (Advantages)

  1. 2-second print removal: Flex the plate and parts pop off — no scraper, no cooling wait, no damaged prints.
  2. Double-sided PEI: Both sides of the spring steel sheet are PEI-coated, doubling the usable lifespan. When one side wears, flip to the other.
  3. 130C max temperature: Supports high-temp filaments like ABS (100-110C bed), PC (110-130C bed), and PA-CF (80-90C bed).
  4. Perfect fit for X-MAX 3: Pre-cut to exactly 325x325mm, no trimming needed. Aligns with the printer's bed clips and leveling probe.
  5. No bed adhesion sprays needed: PEI provides natural adhesion for most filaments. Hairspray, glue stick, or ABS slurry are unnecessary for PLA/PETG/ABS.
  6. Scratch-resistant: Spring steel surface is far more durable than glass. Dropping parts or using a scraper will not crack it.
  7. Easy to clean: Wipe with 90%+ isopropyl alcohol between prints. PEI resists staining and filament residue.
  8. Consistent first layer: The flat spring steel sheet provides a more uniform surface than warped glass, reducing first-layer failures.
  9. Lightweight: At ~350g, it adds minimal weight to the print bed, preserving Z-axis speed and accuracy.
  10. Replacement sheets available: When the PEI coating eventually wears, you can buy just the spring steel sheet without replacing the magnetic base.
  11. Works with enclosure: The magnetic base and PEI sheet are rated for enclosed chamber temperatures up to 70C.
  12. Affordable: At $40.99, it is cheaper than third-party PEI spring steel systems of equivalent size (Wham Bam $55+, BuildTak $35 for consumable sheet only).

Cons (Limitations)

  1. X-MAX 3 exclusive: The 325x325mm size and pre-cut shape will not fit other printers. Not compatible with Bambu Lab, Creality, Prusa, or other QIDI models.
  2. PEI coating wears over time: After 6-12 months of regular use (300-500 print hours), the PEI coating can develop scratches and lose adhesion, requiring sheet replacement.
  3. PETG can stick too well: PETG adheres extremely strongly to PEI. At bed temps above 70C, PETG parts may be difficult to remove and can pull up PEI coating. Use 60-70C bed for PETG.
  4. Magnetic base is permanent: Once the adhesive base is applied to the bed, removing it can leave residue. It is designed to stay on permanently.
  5. Not for ultra-flexible filaments: Very soft TPU (below 85A) may ooze and stick to PEI at low temps. Use a higher bed temp (50-60C) or a separate surface.
  6. Requires Z-offset recalibration: Adding ~1.3mm of total thickness changes the Z-offset. You must recalibrate after installation.
  7. Steel sheet can warp if abused: Excessive flexing or dropping can permanently bend the spring steel, causing an uneven print surface.
  8. Single texture only: This version has smooth PEI only. A textured PEI option is not available for the X-MAX 3 at this time.
  9. Shipping time: Free US shipping takes 15-25 business days. Expedited options are available at extra cost.
  10. Large flat parts may need cooling: Very large flat prints (250mm+) may need to cool to 30-40C before flexing to prevent part cracking during removal.
  11. Adhesive base can fail at high temps: While rated to 130C, prolonged use above 120C may weaken the adhesive over 12+ months.
  12. No included spare sheet: The package includes one magnetic base and one steel sheet. A spare sheet costs extra.

Installation Guide

Before installing: Ensure the printer is powered off and the bed is completely cool (below 30C). Clean the aluminum bed surface with isopropyl alcohol to remove any grease, dust, or adhesive residue.

Step 1: Clean the Bed

Wipe the X-MAX 3 aluminum build plate with 90%+ isopropyl alcohol and a lint-free cloth. Remove all dust, grease, and old adhesive. A clean surface ensures the magnetic base adheres properly.

Step 2: Apply the Magnetic Base

Peel the protective backing from the magnetic base. Align it with the bed surface, starting from one corner. Press firmly from the center outward to eliminate air bubbles. The magnetic base should cover the entire 325x325mm print area.

Step 3: Place the Spring Steel Sheet

Drop the PEI-coated spring steel sheet onto the magnetic base. It will snap into place automatically. Ensure it is centered and flat. The sheet should not wobble or lift at the corners.

Step 4: Recalibrate Z-Offset

The added thickness (~1.3mm) requires Z-offset recalibration. Run auto bed leveling, then print a first-layer test. Adjust Z-offset in 0.05mm increments until the first layer is perfect (slightly flattened, matte, lines touching).

Filament Temperature Guide

Filament Nozzle Temp Bed Temp Adhesion Notes
PLA 190-220C 50-60C Excellent adhesion, easy release when cool
PETG 220-250C 60-70C Very strong adhesion; do not exceed 70C bed or parts may stick permanently
ABS 240-270C 100-110C Good adhesion; enclosure recommended to prevent warping
ASA 240-270C 100-110C Good adhesion; UV-resistant, good for outdoor parts
TPU (95A) 210-230C 40-50C Good adhesion; slow print speed (20-30mm/s)
PA (Nylon) 250-275C 70-80C Good adhesion; dry filament before printing
PA-CF 265-285C 80-90C Excellent adhesion; carbon fiber parts release cleanly when cool
PC 290-320C 110-130C Good adhesion; enclosure required; max bed temp 130C

Maintenance & Care

Cleaning Schedule

  • After every 5-10 prints: Wipe PEI surface with 90%+ isopropyl alcohol and a lint-free cloth.
  • Monthly: Deep clean with warm water and mild dish soap, rinse thoroughly, air dry completely.
  • When adhesion drops: Lightly sand the PEI surface with 2000-grit sandpaper in a circular motion, then clean with alcohol. This restores adhesion for 50-100 more prints.

What to Avoid

  • Do not use acetone on PEI — it can cloud and damage the surface.
  • Do not use a metal scraper directly on the PEI coating — use the flex-to-release method instead.
  • Do not exceed 130C bed temperature — it can damage the magnetic base adhesive.
  • Do not flex the steel sheet more than necessary — excessive bending can permanently warp it.
  • Do not print PETG above 70C bed temp on PEI — parts may fuse to the surface.

Frequently Asked Questions

What is the QIDI X-MAX 3 Soft Magnetic Accessory?
It is a two-part flexible build plate system for the QIDI X-MAX 3 3D printer: a peel-and-stick magnetic base (325x325mm) and a double-sided PEI-coated spring steel sheet that snaps onto the magnet. Prints are removed by flexing the steel sheet, which takes about 2 seconds. It supports bed temperatures up to 130C and costs $40.99.
Will this fit other 3D printers besides the X-MAX 3?
No. The X-MAX 3 Soft Magnetic is pre-cut to exactly 325x325mm and is designed specifically for the X-MAX 3 bed dimensions, leveling probe offset, and bed clip positions. It will not fit the QIDI X-Plus 3 (300x300mm), QIDI Max 4 (325x325mm but different probe), Bambu Lab X1 (256x256mm), Creality K1 (220x220mm), or any other printer.
How do I remove prints from the magnetic build plate?
Wait for the bed to cool to 40-50C (about 2-3 minutes after printing). Lift the steel sheet off the magnetic base by grabbing a corner. Gently flex the sheet (bend it into a slight arc) and the print will pop off. For large flat parts, flex in both X and Y directions. Never use a metal scraper on the PEI surface.
How long does the PEI coating last?
With normal use (PLA, PETG, ABS), the PEI coating lasts 6-12 months or 300-500 print hours. With abrasive filaments (PA-CF, glass fiber), it may wear faster (3-6 months). The sheet is double-sided, so when one side wears, flip it over. When both sides are worn, replacement spring steel sheets are available.
Do I need to use glue stick or hairspray with PEI?
No. PEI provides natural adhesion for PLA, PETG, ABS, ASA, TPU, and nylon when the bed is heated. Glue stick or hairspray is unnecessary and can actually reduce adhesion by creating a barrier. For very large flat ABS parts, a light wipe of ABS slurry (ABS dissolved in acetone) can help, but is usually not needed.
Why is my PETG sticking too hard to the PEI plate?
PETG adheres extremely strongly to PEI at high bed temperatures. Reduce the bed temperature to 60-70C (not 80-90C). Also, ensure the PEI surface is clean (wipe with isopropyl alcohol). If parts still stick too hard, a light dusting of baby powder or a thin layer of PVA glue can act as a release agent. Never try to force a PETG part off a hot PEI bed — wait for it to cool below 40C.
Can I use the magnetic plate for printing ABS or PC in an enclosure?
Yes. The PEI spring steel sheet and magnetic base are rated for bed temperatures up to 130C and chamber temperatures up to 70C. ABS (100-110C bed) and PC (110-130C bed) both work well. The X-MAX 3 has a semi-enclosed design that helps maintain chamber temperature. For PC, ensure the chamber stays above 40C to prevent warping.
How do I clean the PEI surface when adhesion drops?
First, wipe with 90%+ isopropyl alcohol and a lint-free cloth. If adhesion is still poor, lightly sand the surface with 2000-grit (or finer) sandpaper in a circular motion, then clean with alcohol again. This removes the glossy oxidized layer and restores adhesion. For stubborn residue, wash with warm water and mild dish soap, rinse, and air dry completely before printing.
Do I need to recalibrate Z-offset after installing the magnetic plate?
Yes. The magnetic base (~0.5mm) plus spring steel sheet (~0.8mm) adds approximately 1.3mm to the build surface height. After installation, run the X-MAX 3's auto bed leveling sequence, then print a first-layer test and adjust Z-offset in 0.05mm increments until the first layer is perfect. This is a one-time calibration.
What is the shipping time and return policy?
Free US shipping takes 15-25 business days. Express shipping options are available at checkout for faster delivery. The product comes with a 30-day free return policy — if you are not satisfied, return it within 30 days for a full refund. The magnetic base must be unused (not applied to the bed) for a full return.

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