Beli Sakura Tissue-Tek Printer Kaset Sakura Tissue-Tek Auto Write bekas (12.600)

Kondisi: sangat baik (bekas), Complete Desktop Metal 3D Printer System Here we offer you a complete Desktop Metal 3D printer system. Desktop Metal 3D Printer Studio System Complete system: 3D printer + debinding machine + sintering furnace Manufacturer: Desktop Metal The three-part solution comprises a 3D printer, debinder, and furnace. Manufacturer: Desktop Metal Model: Desktop Metal Studio System Condition: Used (Good) Year of manufacture: 2019 Desktop Metal Studio System includes: 1.1 Desktop Metal Studio 3D Printer Bound Metal Deposition (BMD) Technology Features: - Printed materials: Metal - Technology: FDM - Application: Industrial - Other features: Office-compatible - X-axis travel: 30 cm (12 in) - Y-axis travel: 20 cm (8 in) - Z-axis travel: 20 cm (8 in) Description: Unlike laser-based systems that selectively melt metal powders, this printer extrudes bound metal rods—similar to an FDM printer. This eliminates the safety requirements commonly associated with metal 3D printing and enables new features such as the use of closed-cell infill for lightweight, strong parts. 1.2 Desktop Metal Studio Debinder (Debinding Machine) - Fully automatic debinding - Cleaning tank: 17.4 L (in process) / 22.5 L (storage) Description: The debinder prepares green parts for sintering by dissolving the primary binder. With a low-emission design, it does not require external ventilation and is safe for office environments. Automatic fluid distillation and recycling means no refilling is required between cycles. 1.3 Desktop Metal Studio Sintering Furnace - Hybrid technology (microwave & conventional heating elements) - Build volume: 305x205x205 mm - Carbon steel housing - Gas supply: 2 x 900 L gas cylinders - Heating power: 20 kW Features: - Function: Sintering Njdpfxezd Tlls Afvjlf - Configuration: Chamber - Heat source: Gas - Other features: High-temperature, automatic - Maximum temperature: 1,400 °C (2,552 °F) Description: Fully automated and sized to fit through a standard office door, the furnace delivers industry-grade sintering in a package suitable for office environments. Built-in, material- and build-specific temperature profiles ensure uniform heating and cooling, avoiding residual stresses typical of laser-based systems. Condition: used / gebraucht Scope of delivery: (see picture) (Subject to modifications and errors in technical data, specifications are subject to change!) If you have further questions, we are happy to answer them by phone.

Kondisi: sangat baik (bekas), 3D Systems Model: DT60 Build volume: 600 x 450 x 450 mm External dimensions: 1265 x 780 x 1725 mm Z-axis accuracy: 1.25 microns X and Y-axis accuracy: 7.5 microns Max. extruder temperature: 500 ºC Max. build chamber temperature: 120 ºC Nozzle diameter: 0.6 mm Additional available nozzle diameters: 0.2 / 0.4 / 0.8 / 1.0 / 1.2 mm Titanium thermal barrier Two independent extruders Heated filament feed 4 print modes: SINGLE, DUAL, TWIN, REFLEX 220 - 240 V, 50-60 Hz Maximum power consumption: 3 kW/h 7” LCD touchscreen Remote monitoring Industry 4.0 ready: WiFi, Ethernet, HotSpot, USB MMS System – Modular Maintenance System Dual filament loading Automatic filament change Heated feeder Jam detection Filament runout sensor Print recovery system Liquid cooling Njdpfx Ajzd Tugefvjlf Double-hardened glass Bed fixed by vacuum High printing speed Encoder-controlled positioning Condition: used Scope of delivery: (see pictures) (Sale from location!) (Technical specifications subject to change and errors!) For further questions, we are happy to assist you by phone.

Kondisi: sangat baik (bekas), ProJet 3000 HD 3D Printer We are offering an untested ProJet 3D printer. The ProJet™ HD 3000 prints precise plastic parts suitable for functional testing, as communication models, for rapid manufacturing, rapid tooling, and other applications. With features such as a wide selection of materials, various resolution modes, and easy operation, these office-friendly 3D printers help accelerate and maximize your return on investment (ROI). Print Modes: HD – High Definition, UHD – Ultra High Definition Net build volume (xyz): HD Mode: 298 x 185 x 203 mm UHD Mode: 127 x 178 x 152 mm XHD Mode: n/a Resolution: HD Mode: 375 x 375 x 790 DPI (xyz); 32μ layer thickness UHD Mode: 750 x 750 x 890 DPI (xyz); 29μ layer thickness XHD Mode: n/a Nedpfozdnnuox Afvjlf Accuracy (typical): 0.1 – 0.2% of part dimension Accuracy depends on build parameters, part geometry, part placement, and post-processor settings Email Notification: No Build materials: VisiJet® EX200 build material: durable solid material VisiJet® SR200 build material: affordable multipurpose material, available in natural, blue or grey VisiJet® HR200 build material: available in blue, specifically designed for investment casting applications Support material: VisiJet® S100 support material: non-toxic wax for melt-away supports without manual intervention Power supply: 100–127 VAC, 50/60 Hz, single phase, 15A Dimensions (LxWxH) printer only: 737 x 1215 x 1504 mm Weight: printer only 254 kg ProJet Accelerator Software: Easy job setup, template and queue management Automatic part placement and processing optimization tools Comprehensive part file editing tools Automatic support generation Job statistics Network compatibility: 10/100 Ethernet interface Hardware requirements: 1.8 GHz with 1 GB RAM (Open GL support 64 MB Video RAM) or higher Operating system: Windows XP Professional, Windows Vista, Windows 7 Supported file formats: STL and SLC Ambient temperature: 18–28 °C Noise level

Kondisi: Pembawa suku cadang rusak (bekas), SLM Solutions Tipe: SLM 280 HL Dijual satu unit mesin cetak 3D logam profesional tipe SLM 280 2.0 buatan SLM Solutions (Lübeck). Mesin SLM ini dirancang untuk operasi 24/7 dan terakhir digunakan untuk mencetak titanium. Instalasi dilakukan tahun 2018. Mesin sudah dilengkapi panel sintering untuk aliran gas. Selama tiga tahun terakhir, mesin hanya menggunakan argon. Sekitar 50.000 jam laser. Jumlah 50.000 jam tersebut adalah Laser-On-Time; waktu eksposur tidak dicatat pada seri SLM 280 tipe lama. Jika waktu pelapisan diabaikan, estimasi jam laser aktif sekitar 10.000 jam. Perawatan terakhir dilakukan awal 2026. Saat ini, terkadang terjadi gangguan komunikasi antara komputer dan PLC. Hal ini, dalam kasus yang jarang, dapat menyebabkan laporan status yang salah sehingga proses kerja dapat terhenti singkat selama pekerjaan sedang berlangsung. Spesifikasi teknis (ringkasan): Single Laser 400W Berat: 1.245 kg Volume cetak: 280 × 280 × 365 mm Laser: 1 × 400 W fiber laser (IPG) Optik: Sistem 3D Galvo Diameter fokus: 80 – 115 µm Kecepatan pemindaian maksimum: hingga 10 m/s Tebal lapisan: 20 – 90 µm Ukuran fitur minimum: sekitar 150 µm Kecepatan bangun: hingga sekitar 113 cm³/jam (tergantung material) Material: Baja tahan karat, baja perkakas, titanium (Ti64), aluminium, Inconel, CoCr Gas inert: Argon Konsumsi gas proses: sekitar 2,5 – 8 l/menit Nsdjzhlr Eopfx Afvelf Konsumsi gas pembersih: sekitar 70 – 110 l/menit Udara tekan: sekitar 6 – 7 bar Listrik: 400 V, 3P+N+PE Sekering: 63 A Daya terpasang: sekitar 3,5 – 5,5 kW Dimensi mesin: sekitar 2600 × 1200 × 2700 mm Berat: sekitar 1300 kg (kosong), hingga sekitar 1800 kg (termasuk bubuk) Catatan penting: "Meja yang terlihat di foto tidak termasuk dalam penjualan." Kondisi: bekas / used Lingkup pengiriman: (lihat gambar) Mesin SLM 280 Kabin kontrol Ruang proses Panel operasi internal dengan layar (Perubahan dan kesalahan pada data teknis dapat terjadi; informasi dapat berbeda!) Pertanyaan lebih lanjut dapat kami jawab melalui telepon.

Kondisi: bekas, penawaran mesin flexo drum sentral FLEXOTECNICA NG10 tahun 2009 dengan lebar 1280 mm Nedpfx Afoy Sfcnevelf

Kondisi: sangat baik (bekas), Tahun pembuatan: 2019, Fungsionalitas: berfungsi sepenuhnya, jumlah kartrid tinta: 5, saluran warna: 6, jumlah kepala cetak: 12, resolusi (maks.): 1.200 DPI (titik per inci), Zuverlässiger und gepflegter Großformat-UV-Flachbettdrucker für anspruchsvolle Produktionsumgebungen. EFI Pro 30f UV-LED-Flachbettdrucker in gutem Zustand zu verkaufen. Die Maschine befindet sich aktuell im täglichen Produktionseinsatz. Der Drucker ist voll funktionsfähig und wurde regelmäßig gewartet. Interessenten sind herzlich eingeladen, die Maschine im Produktionsumfeld zu besichtigen und vor dem Kauf eigene Testdrucke durchzuführen. Technische Daten Hersteller: EFI Modell: Pro 30f Baujahr: 2019 UV-LED-Drucktechnologie Ricoh Gen5 Druckköpfe Farben: CMYK + Weiß Optionale Klarlack-Funktion Druckbereich: 3,05 × 2,04 m Maximale Materialstärke: 100 mm Im Lieferumfang enthalten EFI Fiery RIP-Software Produktions-PC Njdpfjzbqfxjx Afvolf Komplett betriebsbereites Paket Zustand Voll funktionsfähig Aktuell im täglichen Produktionseinsatz Regelmäßig gewartet Testdruck möglich Lieferung Lieferbedingungen: EXW (Incoterms® 2020), Veikkointie 9, FI-03100 Nummela, Finnland. Der Käufer ist für Demontage, Verladung, Transport und Wiederinbetriebnahme der Maschine verantwortlich. Bei Bedarf können wir erfahrene Partner für Umzug und Inbetriebnahme empfehlen. Bei Fragen oder für weitere Informationen können Sie uns gerne eine Nachricht senden oder anrufen.

Kondisi: bekas, jarak tempuh: 153.044 km, daya: 125 kW (169,95 hp), jenis bahan bakar: diesel, tipe perpindahan gigi: otomatis, konfigurasi gandar: 4x4, jarak roda: 3.220 mm, pendaftaran pertama: 11/2022, kapasitas tangki bahan bakar: 80 l, Emisi CO₂: 234 g/km, kelas emisi: Euro 6, warna: abu-abu, jumlah tempat duduk: 2, jumlah pemilik sebelumnya: 3, Tahun pembuatan: 2022, Perlengkapan: ABS, kantung udara, kemudi berkuasa, kendali jelajah, komputer bawaan, kontrol traksi, kopling trailer, kunci sentral, lampu kabut, pendingin udara, penggerak semua roda, program stabilitas elektronik (ESP), sensor parkir, sistem immobilizer, sistem navigasi,

Tahun pembuatan: 2015, Kondisi: sangat baik (bekas), Dip-Tech GlassJet AR6000, digital glass printer, year 2015 Printing resolution: 360 dpi (true) DIP SPECTRUM INK: Ceramic ink for tempered ESG and TVG glass Ink colors: Black, white, etch simulation, and various decorative colors Currently, 7 print heads are in operation: 4 black and 3 white. This allows for printing in black and white. Maximum glass size: 3300 x 6000 mm Minimum glass dimensions: 400 x 400 mm Glass thickness: 2 – 19 mm Nodjrhkp Espfx Afvslf Operator required: 1 Inline features: Conveyor system Overall dimensions: 6071 x 7746 x 1600 mm (width x length x height) Image format: All common graphic formats including PDF, PS, EPS, TIFF, BMP, and JPEG Ambient temperature: 18 – 25°C Installed power: 400 VAC x 16A, 3-phase, 50/60 Hz In very good condition. Dismantled in February 2024. Available: NOW

Kondisi: baik (bekas), Built-in measuring device, built-in measuring instruments, measuring mechanism, moving-coil instruments, moving-coil measuring mechanism, temperature measuring device, control panel, temperature measuring instrument Nodpfjfcqrrox Afvolf -with: Measuring and control technology type M19 -Measuring range: 20 - 600 °C -Connections: 6 -Dimensions: 545/285/H350 mm -Weight: 21 kg

Kondisi: bekas, Sensor, write head, read head, read/write head, reading/marking station - Manufacturer: Siemens, Moby-M reading/marking station LBS-32 Ovp - Type: 6AW5454-8BH Njdpfjuz H Uijx Afvelf - Box dimensions: 150/40/H40 mm - Weight: 0.2 kg

Tahun pembuatan: 2026, Kondisi: baru, Fungsionalitas: berfungsi sepenuhnya, new PMH filament line Extruder 30 mm - 28 L/D with die for 3D filament extrusion Nlodpfx Aech Sfqsfvsf with cooling bath with surface water blower with laser measuring system (option) with haul-off unit with filament accumulator (option) with winder and traverse unit MADE in GERMANY

Kondisi: sangat baik (bekas), nomor mesin/kendaraan: 12991843, Output: Up to 13,000 #10 envelopes/hour in draft quality Up to 13,000 #10 envelopes/hour in letter quality // Up to 12,000 #10 envelopes/hour in executive quality Image area: 9.4" x 15" (23.876 x 38.1 cm) Equipment / further specifications: Media size: Width: 3” min. to 12.25” max. Length: 5” min. to 15” max. Thickness: Up to 1/4" (depending on weight) Print resolution: 150, 200, 300, 600 dpi horizontal, 600 vertical Print modes: Draft, Letter, Executive Nodpeic N Epjfx Afvjlf Documentation

Tahun pembuatan: 2010, Kondisi: sangat baik (bekas), nomor mesin/kendaraan: LNDE002222, Ink technology: UltraChrome® Nedpfspitkrox Afvjlf Colors: Photo Black, Matte Black, Cyan, Vivid Magenta, Yellow Minimum droplet size: 3.5 pl Nozzle configuration: 360 nozzles black, 360 nozzles per color Print resolution: 2,880 x 2,880 dpi Paper formats: A0, A1, A2 (42.0 x 59.4 cm), DIN A3+, A3 (29.7 x 42.0 cm), A4 (21.0 x 29.7 cm), B1 (72.8 x 102.8 cm), B2 (51.4 x 72.8 cm), DIN B3, DIN B4, 17 inch, 24 inch, 44 inch Page margins – single sheet mode 1: 3 mm (top), 3 mm (right), 14 mm (bottom), 3 mm (left) Compatible paper thickness: 0.08 mm - 1.5 mm Duplex: NO Equipment / further details: with roll stand

Kondisi: sangat baik (bekas), Kondisi sangat baik, saat ini digunakan dalam lini produksi dengan mesin pemuat otomatis yang mengambil batang sereal, yang kemudian dimuat ke dalam mesin ini. Video lini produksi tersedia jika diminta. Mesin ini dapat dilihat beroperasi hingga akhir Agustus 2023. Nledenmv Raepfx Afvsf

Tahun pembuatan: 2026, Kondisi: baru, ADL III 1500 AUTOMATIC DUCT PRODUCTION LINE This machine is designed for the production of rectangular ventilation ducts; it can manufacture flat sheets as well as U- and L-shaped duct elements without the need for additional programming. It is also capable of producing a single type of Pittsburgh lock in an L-shape. The Auto Duct Former is equipped with a Servo Motor and Servo Gearbox, which ensures measurement accuracy and prevents errors. The drive for the bender and guillotine is provided by a hydraulic system. The machine is fitted with two types of embossing: Z-type and trapezoidal type. It features a selector for switching sheet coils on three decoilers. Technical Specifications Sheet processing range: Min: 0.5mm – Max: 1.5mm Min. duct size: 100x100mm Dimensions: Width 2,200mm x Length 5,000mm x Height 1,500mm Weight: 3,000kg Power: 2.2kW Servo Motor Rail-mounted decoilers: 3 pcs Njdpfop T Sk Hsx Afvelf Sheet change selector

Kondisi: diremaj di bengkel (bekas), de_DE_to_en_GB Nlodpfxsvq Sm Es Afvsf

Kondisi: sangat baik (bekas), Printer inkjet Videojet 1520/1560/1630 berbagai tipe Tipe 1520 Tipe 1560 Nodpjvmdw Ujfx Afvelf Tipe 1630 berbagai bahan habis pakai tersedia (1 palet) Total 25 unit!!! Penjualan hanya secara keseluruhan!!! Kondisi sangat baik, langsung dari produksi!!!

Kondisi: baru, Tahun pembuatan: 2025, Ukuran (Panjang/Lebar/Tinggi) 1500x700x1600 mm Berat 900 kg Total kebutuhan daya 0 kW Mesin pengasah mata pisau serut GRINDER 1000 AUTO MAGNETIC PLC - Lebar kerja maksimum 1000 mm - Proses kerja otomatis pada sumbu X dengan THK - Rel linear dan penyedot debu Nledpfx Aovz Hgbofvsf - Penyesuaian otomatis pada sumbu Z - Meja penjepit magnetik 140 x 1000 mm - Sudut pengasahan +/- 90° - Kecepatan putar roda pengasah 2840 RPM - Roda mangkuk 150 x 68 x 32 mm - Kecepatan umpan 3-9 m/menit, dapat disesuaikan secara bertahap dengan penggerak frekuensi - Motor 1,5 kW / 400 V - Motor penggerak umpan 60 W - Motor pompa pendingin 40 W - Sistem pendingin mencegah mata pisau menjadi terlalu panas - Lampu halogen dengan dudukan yang dapat disesuaikan - Dimensi P=1500, L=700 mm, T=1600 - Berat 900 kg

Kondisi: baru, Tahun pembuatan: 2025, kecepatan spindel (maks.): 1.450 rpm, daya motor spindle penggiling: 7.500 W, diameter roda gerinda: 250 mm, en-US Nodpfx Aogwct Defvjlf

Kondisi: bekas, Tahun pembuatan: 1986, nomor mesin/kendaraan: 246, Manual case maker Schmedt PräDeck, year 05/1986, serial no. 246. Online video inspection possible via Skype video. We would be delighted to welcome you for a visit – further machines in stock. Available immediately – inspections possible onsite. Located in Emskirchen / Nuremberg – machine can be tested. Nsdpfxjh Axi Ro Afvslf

Kondisi: bekas, jarak tempuh: 138.069 km, daya: 130 kW (176,75 hp), pendaftaran pertama: 11/2006, jenis bahan bakar: diesel, berat keseluruhan: 7.490 kg, warna: biru, tipe perpindahan gigi: mekanis, kelas emisi: Euro 4, jumlah tempat duduk: 3,

Kondisi: sangat baik (bekas), Tahun pembuatan: 2015, EFITM VUTEk® HS100 Pro, mesin cetak inkjet UV digital berkecepatan tinggi yang dirancang untuk volume besar, menggabungkan produktivitas pencetakan sablon dengan kualitas gambar yang mendekati hasil cetak offset. Mesin cetak telah dibersihkan dan disiapkan untuk pengiriman. Produktivitas revolusioner: • Printer UV digital hibrida 3,2 meter dapat memproses hingga 100 lembar/papan per jam dalam mode produksi; Nedpfx Aszl D Adefvslf hingga 70 papan per jam dalam mode P-O-P. • Biaya per papan lebih rendah karena menghilangkan persiapan untuk variasi pekerjaan, regionalisasi, dan penyesuaian. • Lebih sedikit limbah, lebih sedikit waktu henti, dan tidak ada peningkatan biaya tenaga kerja. Untuk detail teknis lebih lanjut, silakan lihat brosur terlampir.

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, jam operasional: 560 h, Massivit 1800 adalah printer 3D industri format besar yang dirancang untuk memproduksi prototipe skala penuh, display, cetakan, elemen scenic, dan tooling komposit berukuran besar. Mesin ini menggunakan teknologi Gel Dispensing Printing (GDP) milik Massivit, berbeda dengan proses FDM atau SLA konvensional. Mesin berfungsi penuh, masih aktif produksi. Demo dapat dilakukan atas permintaan. Hanya 560 jam cetak! Lokasi: Eropa Versi dengan double printhead (kepala cetak ganda). Harga sudah termasuk proses dekomisioning dan pemuatan ke truk. Instalasi dan pelatihan tersedia. Nlodpezcv S Hefx Afvjf Lisensi perangkat lunak permanen Produsen: Perusahaan: Massivit 3D Printing Technologies Model: Massivit 1800 Spesifikasi Utama: Spesifikasi Nilai Teknologi Pencetakan Gel Dispensing Printing (GDP) Volume Cetak (L×P×T) 1,17 × 1,50 × 1,80 m Berat Maksimum Bagian 150 kg Produktivitas Sumbu Z Hingga 35 cm/jam Kecepatan Cetak Linear Hingga 300 mm/detik Material Dimengel UV-curable photopolymer Format File STL Dimensi Mesin 3,1 × 2,2 × 2,8 m Berat Mesin 2.500 kg Kebutuhan Listrik 380–400 VAC, 3-fasa, 32 A Konsumsi Daya ~10 kW selama pencetakan Tingkat Tekanan Udara 6–8 bar udara terkompresi Suhu Operasi 16–30 °C Kepatuhan CE Untuk informasi teknis dan komersial lebih lanjut, silakan lihat brosur terlampir.

Kondisi: hampir baru (bekas), Fungsionalitas: berfungsi sepenuhnya, Tahun pembuatan: 2023, jam operasional: 50 h, panjang total: 1.000 mm, tinggi total: 500 mm, lebar total: 500 mm, jenis arus masuk: AC (pendingin udara), berat keseluruhan: 550 kg, suhu: 280 °C, suhu lingkungan (min.): 15 °C, suhu lingkungan (maks.): 28 °C, akurasi pemposisian: 0,1 mm, ketebalan dinding: 1 mm, persyaratan ruang panjang: 2.715 mm, kebutuhan tinggi: 2.765 mm, lebar yang dibutuhkan: 2.170 mm, High-Performance Materials: Best-in-Class Print Heads Equipped with advanced nozzles, the STUDIO G2 is ready to print fiber-reinforced and other industrial-grade materials at maximum speed and precision. Its specially engineered extruder delivers exceptional detail fidelity, with layer thicknesses starting from just 0.1 mm on objects up to one meter in length. This allows for more options to optimize the mechanical properties of your components. Optimal Printing Temperatures: The Heated Build Chamber Njdpewgbcysfx Afvslf The fully enclosed, temperature-controlled build chamber of the STUDIO G2 creates ideal conditions for printing with industrial-grade materials. Transparent doors provide operators with safe and easy access to the print bed and enable visual monitoring of the printing process. User-friendly features such as automatic pausing when the enclosure is opened ensure smooth and safe operation. Independent Temperature Control: Heated Filament Compartments Integrated heated filament chambers keep printing materials dry in a consistently controlled environment, ensuring unrivaled print quality within this class. The filament chamber goes beyond industry standards by offering temperature regulation independent of the build chamber. Optimal Printing Temperatures: Rapid Heating Print Bed Minimize setup times with a fast-heating print bed. The bed temperature can be increased up to 100°C to enhance adhesion and support a wider range of materials. A new inductive sensor enables quick, precise, semi-automatic bed leveling. Simple & Intuitive: The New Slicer The user-friendly BigRep “BLADE” slicing software offers enhanced control over print parameters and provides presets for all BigRep-compatible materials, enabling a fast and hassle-free printing start. BLADE is one of the fastest and most precise slicers on the market, developed specifically for large-format printing. Big Enough for Any Idea: The Large Build Volume Unleash innovation with the STUDIO G2’s spacious build volume of 500 mm x 1000 mm x 500 mm, all within a compact unit and equipped with features optimized for the rapid production of large-format, industrial-grade components at high resolution.

Kondisi: bekas, nomor mesin/kendaraan: LM70-064, Tahun pembuatan: 2022, Berat: sekitar 6.900 kg, lebar cetak maksimum (lembaran): 3.500 mm, lebar cetak maksimum (rol): 3.470 mm, kecepatan maksimum: hingga 330 m²/jam, ketebalan material maksimum: 70 mm, berat rol maksimum: 300 kg, pengeringan: pengerasan UV-LED, hasil produksi: sekitar 1,5 juta m² dicetak, sistem pengumpanan dan penumpukan otomatis penuh, sensor cahaya, 2 tempat palet, 1 unit pendingin SMC HRS024-AF-20, R407c, meja penumpukan rol yang dapat dilipat (mesin telah dibersihkan, kepala cetak dikosongkan dan ditutup, pengaman transportasi untuk kereta dipasang). Nlsdpfszqzawox Afvjf