Žiedas Lenkimo Staklės pirkti naudotą (48 474)

Sąlyga: naujas, Condition: new Delivery time: approx. 10 weeks from order Country of origin: Turkey Price: €53,600 Leasing rate: €1,013.04 Bending length: 2050 mm Sheet thickness (420 N/mm²): 3 mm Max. sheet thickness – stainless steel: 2 mm Max. sheet thickness – aluminium: 4 mm Drive: motorized Length: 3350 mm Width: 2200 mm Height: 1900 mm Weight: 3800 kg Backgauge: 1000 mm CNC CONTROL WITH TABULAR PROGRAMMING - 15.6" touchscreen mounted on swiveling arm - Tabular programming via entry of respective axis values - Open or closed hemming function Dksdpfxswiq E Nj Af Hju - Multi-radius functions for hemming or bending - Programming of material grade, sheet thickness, springback, bending corrections, and creation of a database for various material types, sheet thicknesses, and sheet lengths - Piece counter - Authorization by password - 128GB HDD, offering virtually unlimited storage - Remote maintenance via WLAN - detailed alarm, tooling, and parameter pages Motorized drive (AC motors) for upper beam and bending beam (Z and Y axes) Motorized backgauge (X axis) with servo drive, 1000 mm, rectangular configuration, with ball rollers in the sheet inlets Upper beam opening: 220 mm (without tools) Manual adjustment of the bending beam: 35 mm Upper beam with 45° geometry Continuous upper tooling rail 20° with R1 2 pcs bending beam rails (7 or 10 mm, 15 or 25 mm) Front light curtain safety Triple foot pedal OPTIONS: Segmented Dutch bend rails Pneumatic tool clamping Segmented lower and bending tool Servo drive for the bending beam Manual crowning system Second foot pedal Side gauge Rear light curtain safety 2D or 3D graphic control PC software Special omega geometry for lower and bending tool Tapered backgauge Backgauge extension Vacuum holder

Sąlyga: naujas, Gamybos metai: 2025, veikimo valandos: 50 h, Funkcionalumas: visiškai funkcionalus, mašinos/transporto priemonės numeris: HorizOne50_2, bendras svoris: 1 500 kg, įrankio aukštis: 300 mm, darbinis greitis: 10 mm/s, bendras ilgis: 1 850 mm, bendras aukštis: 1 250 mm, bendras plotis: 850 mm, atbulinės eigos greitis: 40 mm/s, darbinio aukščio: 1 000 mm, stalo plotis: 1 000 mm, stalo ilgis: 1 000 mm, stalo aukštis: 1 000 mm, eigos ilgis: 250 mm, spaudimo jėga: 50 t, ilgio ribotuvas: 1 000 mm, lenkimo ilgis: 300 mm, kėlimo greitis: 10 mm/s, lenkimo jėga (didž.): 50 t, garantijos trukmė: 36 mėnesiai, Electric horizontal bending machine HorizOne 50 with spindle drive from CoastOne, Finland. Dedoxd U Emopfx Af Heku 500 kN pressing force provided by a precise and low-maintenance spindle drive with servo motor and servo controller. Simple, intuitive programming via the proven CoastOne TC12-2D control system. Automatically controlled side stop enables convenient processing of your sheet metal parts, from single item production to series manufacturing.

Sąlyga: naudotas, Gamybos metai: 2000, veikimo valandos: 70 000 h, Gamintojas: TBE BUTLER Tipas: TBE MULTIBEND Visiškai dokumentuota, peržiūrima, patikrinama! Djdpfoxclfhox Af Hoku Laido skersmens diapazonas: nuo 1,0 mm iki 10,0 mm 8 servo ašys standartiškai – pasirinktinai iki 24 ašių Integruota programų atmintis Nepriklausoma kilpų formavimo stotis Lenkimo galvučių posvyrio valdymas Servo indeksavimo įrenginys 3D sukimui Automatinis detalės pasukimas daugiasluoksniam lenkimui Moduliniai įrankiai – greitas pritaikymas Integruotas atraižų atrinkėjas Pilnos diagnostikos ir klaidų tolerancijos sistemos Jutiklinis ekranas programavimui – Allen-Bradley®

Sąlyga: naujas, The KPB 81 is a powerful tube and profile bending machine from the KNUTH series, combining maximum bending performance with advanced mechanical engineering. Equipped with three motor-driven rolls and hardened rollers and shafts, it ensures precise bending of medium and heavy steel profiles. The hydraulically adjustable bending rolls provide not only high drive power but also optimal adaptation to various profile shapes. Additionally, the KPB 81 features an adjustable overload protection and offers the flexibility to operate both horizontally and vertically. Standard equipment includes a digital display, operator console, and a footswitch with emergency stop. This machine is ideally suited for metal construction, locksmith workshops, as well as applications in the furniture and advertising industries. Purchase your KNUTH tube and profile bending machine KPB 81 now and benefit from its robust capabilities in tube and profile processing. Dedpen Upglefx Af Heku

Sąlyga: naujas, Sheet width: 1070 mm Sheet thickness: 2.0 mm Djdpfsfv A Epex Af Hsku Frame opening: 1100 mm Top roller diameter: 76 mm Total power requirement: manual operation Machine weight: approx. 0.22 t Space requirement: approx. 1.8 x 0.8 x 1.3 m Sheet bending machine equipped with: - Capacity: 1050 x 2 mm - High-strength, forged steel rollers with SAE 1050 certification - Conical bending capability - Swing-out top roller - CE marking

Sąlyga: naujas, Condition: New Delivery time: approx. 10 weeks from order Country of origin: Turkey Price: €55,300 Leasing rate: €1,045.17 Bending length: 2,550 mm Sheet thickness (420 N/mm²): 2.5 mm Max. sheet thickness – Stainless steel: 1.5 mm Max. sheet thickness – Aluminium: 3.5 mm Drive: Motorized Length: 3,830 mm Width: 2,200 mm Height: 1,900 mm Weight: 4,050 kg Backgauge: 1,000 mm CNC CONTROL WITH TABULAR PROGRAMMING - 15.6" touchscreen on swiveling arm Dksdpfxewiq A Ue Af Hou - Tabular programming via axis value input - Open or closed hemming function - Multi-radius functions for hemming and bending - Programming of material quality, sheet thickness, springback, bending corrections and creation of a database for various material types, sheet thicknesses and sheet lengths - Piece counter - Password authorization - 128GB HDD, providing nearly unlimited storage capacity - Remote maintenance via WLAN - Detailed alarm, tool, and parameter pages Motorized drive (AC motors) for the upper beam and bending beam (Z and Y axes) Motorized backgauge (X axis) with servo drive, 1,000 mm, rectangular configuration, with ball rollers in the sheet support Upper beam opening 220 mm (without tooling) Manual adjustment of bending beam 35 mm Upper beam with 45° geometry Continuous upper tool rail 20° with R1 2 pcs. bending beam rails (7 or 10 mm, 15 or 25 mm) Front light curtain safety system Triple foot pedal OPTIONS: Segmented gooseneck rails Pneumatic tool clamping Segmented lower and bending tools Servo drive for the bending beam Manual crowning system Second foot pedal Side stop Rear light curtain safety system 2D or 3D graphic control PC software Special omega geometry for lower and bending tool Tapered backgauge Backgauge extension Vacuum holder

Sąlyga: naudotas, Gamybos metai: 1996, Lakšto plotis: 2050 mm Lakšto storis: 4,0 mm Stovų tarpas: 2100 mm Volelių skersmuo: 140 mm Bendra galingumo poreikis: 4,4 kW Djdow In Azepfx Af Hsku Mašinos svoris apie: 1,4 t Užimamas plotas apie: 3,1 x 0,7 x 1,1 m 3 volelų lakštų lenkimo staklės - 3 varomi voleliai

Sąlyga: naujas, Condition: New Delivery time: approx. 10 weeks from order Country of origin: Turkey Price: €57,100 Leasing rate: €1,079.19 Bending length: 3,200 mm Sheet thickness (420 N/mm²): 2 mm Max. sheet thickness – stainless steel: 1.2 mm Max. sheet thickness – aluminium: 3 mm Drive: Electric Length: 4,450 mm Width: 2,200 mm Height: 1,900 mm Weight: 4,500 kg Back gauge: 1,000 mm CNC CONTROL WITH TABULAR PROGRAMMING - 15.6" touchscreen on swivel arm - Tabular programming by entering respective axis values - Open or closed hemming function - Multi-radius functions for hemming or bending - Programming of material grade, sheet thickness, springback, bending corrections, and creation of a database for various material types, sheet thicknesses, and sheet lengths Dedpfxswiq A Ie Af Hoku - Piece counter - Password authorization - 128GB HDD, virtually unlimited storage - Remote maintenance via WLAN - Detailed alarm, tool, and parameter pages Electro-mechanical drive (AC motors) for upper beam and bending beam (Z and Y axes) Motorized back gauge (X axis) with servo drive, 1,000 mm, rectangular configuration, with ball rollers in the sheet inserts Upper beam opening: 220 mm (without tools) Manual adjustment of bending beam: 35 mm Upper beam with 45° geometry Continuous upper tool rail, 20° with R1 2 bending beam rails (7 or 10 mm, 15 or 25 mm) Front light curtain safety system 3-position foot pedal OPTIONS: Split gooseneck rails Pneumatic tool clamping Split lower and bending tools Servo drive for the bending beam Manual crowning system Second foot pedal Side gauge Rear light curtain safety system 2D or 3D graphic control PC software Special omega geometry for lower and bending tools Conical back gauge Back gauge extension Vacuum holder

Sąlyga: naujas, Lakšto plotis: 1070 mm Dedow In A Iopfx Af Hjku Lakšto storis: 9,0 / 10,0 mm Stovo plotis: 1070 mm Viršutinio veleno diametras: 190 mm Lenkimo pajėgumas: 9,0 mm Prijungimo galia: 5,3 kW Staklių svoris: apie 2,4 t Užimamas plotas: apie 2,7 x 0,92 x 1,2 m Lakštų lenkimo staklės su profilių lankstymo įrenginiu - Elektriškai reguliuojamas galinis volas - Elektriškai reguliuojamas apatinis volas (medžiagos įtempimas) - Skaitmeninis ekranas galinio volo judesiui - Skaitmeninis ekranas apatinio volo judesiui (medžiagos prispaudimas) - Grūdinti volai - Kūginis volavimas - Pasukamas viršutinis volas - Stabdžio variklis - Avarinis stabdis - Dokumentacija anglų kalba - 400 V

Sąlyga: naudotas, Condition: Used Stock number: 080064 Delivery time: Immediate, subject to prior sale Country of origin: Germany In stock: 1 Bending length: 4010 mm Bending capacity steel (400 N/mm²): 1.25 mm Bending capacity aluminium (190 N/mm²): 2 mm Cutting capacity electric shear: 1.25 mm Number of frame clamping units: 4 Dodpfx Afowiqzks Hjku Number of driven bending elements: 4 Insertion depth: 1000 mm Opening width: 190 mm Working height: 835 mm Motor: 2.2 kW Length with electric shear: 5200 mm Width: 1300 mm Height: 1900 mm Weight: 1550 kg Factory overhauled in 2025 / Machine frame year of construction: 1992 Electric cutting device Angle presetting via rotary control Upper beam opening height infinitely adjustable Foot pedals Two-person operation via second foot pedal Operating manual in GERMAN including CE Declaration of Conformity

Sąlyga: naujas, Sheet width: 1000 mm Sheet thickness: 8.0 mm Frame opening: 1070 mm Top roll diameter: 150 mm Pre-bending capacity: 6.0 mm Dksdpfxsfv H A Hj Af Hsu Connected load: 4.0 kW Machine weight approx. 1.4 t Space requirement approx. 2.6 x 0.65 x 1.1 m Sheet bending machine with profile bending attachment - Electrically adjustable rear roller - Electrically adjustable lower roll (material clamping) - Digital display for rear roller movement - Digital display for lower roll movement (material clamping) - Hardened rolls - Cone bending - Swing-out top roll - Brake motor - Emergency stop - Documentation in English - 400 V

Sąlyga: naujas, Condition: New Delivery time: approx. 2–4 weeks from order Country of origin: Italy Price: €3,620 Max. diameter (steel tube): 38 mm Length: 245 mm Width: 300 mm Height: 320 mm Weight: 23 kg Max. bending section modulus: 19 cm³ Standard steel tube: 38 x 1.5 mm Furniture tubing: 38 x 1.5 mm St35 (for hydraulic lines): 35 x 3 mm Stainless steel AISI304-318: 30 x 2 mm Stainless steel AISI308 (food grade): 35 x 1.5 mm Dodpfx Aowiqxiof Heku Soft brass: 42 x 1.5 mm Hard copper and aluminium: 42 x 1.5 mm Soft copper: 50 x 2 mm Conduit pipe (TAZ): 50 x 2 mm Mepla, Gebereit and similar: 50 x 4 mm Round steel (S275JO): 20 mm Bar steel (S275JO): 10 x 25 mm Flat steel (S275JO): 25 x 20 (upright), 25 x 1 mm Max. bending radius: 180 mm Min. bending radius: 36 mm Min. tube Ø: 10 mm Max. bending speed: 2.8 rpm Motor: 0.9 kW Bending angle adjustment: 0–180° Single-phase motor: 230V / 900W Electric motor brake Indicator light for overload display Base made of forged steel – suitable for mounting on a tripod (tripod not included) 90° bend in 6 seconds Foot pedal No tooling included OPTION: Tripod base €320,-

Sąlyga: naujas, Sheet width: 1570 mm Sheet thickness: 10 mm Pre-bending: 8 mm Total power requirement: 7 kW Machine weight: approx. 4.5 t Space requirement: approx. 3.5 x 1.5 x 1.55 m – 4 rolls – Capacity: 1570 x 10 – Pre-bending: 8 mm – Hardened rolls – Upper roll diameter: 220 mm – Lower roll diameter: 220 mm – Side roll diameter: 180 mm – Hydraulic – Digital display for left roll movement – Digital display for middle lower roll movement – Digital display for right roll movement – Top roll hydraulically swing-out – Steel construction ST-52 – Hydraulic drop-end for easy roll positioning Dksdpfxjvkixxe Af Hju – Hydraulic up/down movement system with middle and side rolls – Hydraulic balancing system – Overvoltage protection – Documentation – 400V

Sąlyga: naujas, Gamybos metai: 2025, Būklė: nauja Pagaminimo metai: 2025 Sandėlio numeris: 080093 Pristatymo laikas: iš karto, galimas tarpinis pardavimas Kilmės šalis: Turkija Kaina: 5530 € Lizingo įmoka: 106,73 € Sandėlyje: 1 vnt. Lankstymo ilgis: 1050 mm Lakšto storis (420 N/mm²): 1,5 mm Maks. lakšto storis - nerūdijantis plienas: 1 mm Maks. lakšto storis - aliuminis: 2,2 mm Maksimalus lenkimo kampas: 150° Galinė atrama rankinė: 500 mm Didžiausias atidarymo plotis be įrankių: 200 mm Ilgis: 1300 mm Plotis: 750 mm Dedpfewiqwrox Af Hoku Aukštis: 1515 mm Svoris: 280 kg Lenkimo sija reguliuojama: 35 mm Segmentuoti viršutiniai, apatiniai ir lenkimo įrankiai pagaminti iš 42CrMo4 plieno, grūdinti iki 60 HRC Rankinė galinė atrama Reguliuojamas kampinis atmušas Įrankių skyrius ir dėžutė Staklės ant užfiksuojamų ratukų Eksploatavimo instrukcija vokiečių arba anglų kalbomis

Sąlyga: naujas, Sheet width: 1070 mm Sheet thickness: 3.0 mm Frame clearance: 1100 mm Top roller diameter: 95 mm Roll diameter: 140 mm Total power requirement: 1.1 kW Machine weight: approx. 0.37 t Space requirement: approx. 1.35 x 0.76 x 1.25 m Sheet bending machine with: - Capacity: 1050 x 3 mm - Electrically adjustable rear roll - Digital display for rear roll - Hardened rollers Dkodpfx Aefv A Ewsf Hsu - Cone bending - Swing-out top roller - Emergency stop safety cable - Documentation - 400V

Sąlyga: naujas, Gamybos metai: 2024, Būklė: nauja Pagaminimo metai: 2024 Sandėlio numeris: 8310 Pristatymo laikas: iš karto, galimas tarpinis pardavimas Kilmės šalis: Taivanas Kaina: 45 500 € Lizingo kaina: 869,05 € Sandėlyje: 1 vnt. Lenkimo ilgis: 2035 mm Lakšto storis (420 N/mm²): 3,5 mm Pavara: hidraulinė Maks. lenkimo kampas: 135° Ilgis: 3000 mm Plotis: 1100 mm Aukštis: 1750 mm Svoris: 2200 kg NC valdymas lenkimo kampo pasirinkimui Rankinis galinis atmušėjas 600 mm Hidraulinė pavara Viršutinės sijos vertikalus judėjimas Dodpfswiqvnsx Af Hoku Daloma žąsies kaklelio formos štampavimo juosta 30°, aukštis 110 mm su greito keitimo sistema Lenkimo štampavimo juosta 30 mm Įranga pagal CE reikalavimus

Sąlyga: naujas, Sheet width 700 mm Sheet thickness 4.0 mm Stand width 720 mm Upper roller diameter 95 mm Total power requirement 1.1 kW Machine weight approx. 0.37 t Space requirement approx. 0.95 x 0.76 x 1.25 m Sheet bending machine with special dimensions: - Capacity 700 x 4 mm - 2 speeds - Electrically adjustable rear roller - Digital display for rear roller Dedpsfv H Axjfx Af Heku - Hardened rollers - Conical bending - Swiveling upper roller - Emergency stop safety rope - Documentation - 400V

Sąlyga: naudotas, Gamybos metai: 2021, Condition: used Year of manufacture: 2021 Stock number: 9502 Country of origin: Turkey Price: €2,100 In stock: 1 Bending length: 1,050 mm Max. bending capacity – mild steel: 2 mm Top roller diameter: 75 mm Length: 1,930 mm Width: 700 mm Dksdpfxswiquqs Af Hsu Height: 1,160 mm Weight: 300 kg AS NEW CONDITION 3 rollers Asymmetric roller arrangement – with pre-bending Wire grooves on lower and rear rollers Lower roller adjustment via central lever – with gear drive Base frame Operating manual available in GERMAN or ENGLISH

Sąlyga: naujas, Sheet width: 1000 mm Sheet thickness: 5.0 mm Stand width: 1070 mm Top roll diameter: 130 mm Total power requirement: 4.0 kW Machine weight: approx. 1.15 t Space requirements: approx. 2.55 x 0.65 x 1.1 m - Electrically adjustable rear roll - Electrically adjustable lower roll (material clamping) - Digital display for rear roll movement - Digital display for lower roll movement (material clamping) - Hardened rolls - Conical rolling - Swing-out top roll Dksdpfxofv H A Aj Af Hsu - Brake motor - Emergency stop - Documentation in English - 400 V

Sąlyga: naujas, Gamybos metai: 2025, Condition: new Year of manufacture: 2025 Stock number: 090089 Delivery time: prompt, subject to prior sale Country of origin: Turkey Price: €8,900 Leasing rate: €171.77 In stock: 1 Pressing force: 20 tons Stroke: 185 mm Max bending capacity (mild steel): 200 x 12 mm Table: 480 x 1060 mm Tool holder height: 200 mm Pin diameter: 80 mm Working speed: 10 mm/s Return speed: 10 mm/s Motor: 2.2 kW Working height: 930 mm Length: 1150 mm Dsdpfx Aowiqt Tjf Hoku Width: 480 mm Height: 1200 mm Weight: 530 kg Programmable stroke and return point Adjustable speed and pressure Manual jog operation and automatic mode Tool holders and tooling hardened and ground 3 tool holder pins Press brake tooling Manual back gauge: 400 mm Foot pedal OPTIONS: Cutting, punching, or tube bending tools available on request

Sąlyga: naujas, Sheet width 700 mm Sheet thickness 2.0 mm Frame opening 750 mm Upper roll diameter 76 mm Total power requirement 0.75 kW Machine weight approx. 0.29 t Space requirement approx. 1.3 x 0.8 x 1.3 m Dedpfsrrkdkjx Af Hsku Plate bending machine with: - Capacity 700 x 2 mm - High-strength, drop-forged rolls with SAE 1050 certification - Upper and lower rolls powered, idler roll unpowered - Foot switch - Conical bending - Swiveling upper roll - Emergency stop safety wire - Documentation - CE marking - 400 Volt

Sąlyga: naujas, Condition: New Delivery time: approx. 10 weeks from order Country of origin: Turkey Price: €21,900 Lease rate: €420.48 Press force: 80 t Stroke: 285 mm Max. bending capacity – structural steel: 300 x 25 mm Table: 750 x 1425 mm Pin height: 300 mm Pin diameter: 105 mm Djdpfx Afjwiqrcs Hoku Working speed: 10 mm/s Return speed: 10 mm/s Motor: 10 kW Working height: 930 mm Length: 1430 mm Width: 750 mm Height: 1450 mm Weight: 1,700 kg Stroke adjustment with digital display Manual and automatic operating modes Tool holders and tooling hardened and ground Press brake tooling Foot pedal OPTIONS: Cutting, punching, or pipe bending tools available on request

Sąlyga: naujas, Gamybos metai: 2024, Būklė: nauja Pagaminimo metai: 2024 Sandėlio numeris: 9722 Pristatymo laikas: iš karto, galimas tarpinis pardavimas Kilmės šalis: Turkija Kaina: 16 600 € Lizingo įmoka: 318,72 € Sandėlyje: 1 vnt. Lenkimo ilgis: 2050 mm Maks. lenkimo pajėgumas - statybinis plienas: 3 mm Dkedpswiqpbjfx Af Hsu Viršutinio volo skersmuo: 130 mm Voliavimo greitis: 3,5 m/min Variklio galia: 2,2 kW Ilgis: 3200 mm Plotis: 750 mm Aukštis: 1000 mm Svoris: 1500 kg 3 volai Asimetrinė volų konfigūracija – su prilenkimu 2 varomi volai su stabdžių varikliu GRŪDINTI VOLAI Šoninių volų nustatymas rankiniu būdu Atlenkiamas viršutinis volas į priekį Pirmyn/atgal darbas Kūginis valcavimas pakreipiant galinį volą Mobilus valdymo pultas EKSPLOATAVIMO INSTRUKCIJA VOKIEČIŲ KALBA PAPILDOMOS PARINKTYS: (pristatymo laikas su parinktimis apie 8 savaites) Variklių valdoma šoninių volų nustatymas Skaitmeninis šoninių volų padėties indikatorius

Sąlyga: naujas, Gamybos metai: 2024, Būklė: nauja Pagaminimo metai: 2024 Sandėlio numeris: 9741 Pristatymo terminas: iš karto, tarpinis pardavimas galimas Kilmės šalis: Turkija Kaina: 6.200 € Lizingo įmoka: 119,66 € Sandėlyje: 1 vnt. Lankstymo ilgis: 1050 mm Maks. lenkimo galia – konstrukcinis plienas: 3 mm Viršutinio volo skersmuo: 90 mm Valcavimo greitis: 6 m/min Variklio galia: 1,1 kW Ilgis: 1630 mm Plotis: 700 mm Aukštis: 1200 mm Svoris: 480 kg 3 volai Asimetrinis volų išdėstymas Dodpfowiqnwjx Af Hjku 2 pavaruojami volai su stabdžiu varikliu Galinio volo nustatymas rankiniu ratuku Vielos įleidimo grioveliai apatiniame ir galiniame voluose Atsiverčiantis viršutinis volas Dešinės/kairės eigos jungiklis su dvigubu kojiniu jungikliu Kūginio valcavimo įranga Vartotojo instrukcija vokiečių kalba

Sąlyga: naujas, Būklė: nauja Pristatymo laikas: apie 10 savaičių nuo užsakymo Kilmės šalis: Turkija Kaina: 6700 € Lizingo įmoka: 129,31 € Lankstymo ilgis: 1550 mm Maks. lankstymo galia – konstrukcinis plienas: 2 mm Viršutinio volo skersmuo: 90 mm Volelio sukimosi greitis: 6 m/min Variklio galia: 1,5 kW Ilgis: 2130 mm Plotis: 700 mm Dedpfx Afswiqnkj Hoku Aukštis: 1200 mm Svoris: 545 kg 3 volai Asimetrinis volų išdėstymas 2 varomi volai su stabdžiu variklio pagalba Galinio volo reguliavimas rankiniu ratu Vielos grioveliai apatiniame ir galiniame voluose Atverčiamas viršutinis volas Dešinės/kairės eigos valdymas su dvigubu kojiniu jungikliu Kūginio volavimo įranga Eksploatavimo instrukcija VOKIEČIŲ arba ANGLŲ kalba PASIRINKTINAI: Grūdinti volai Motorinis galinio volo reguliavimas Skaitmeninis indikatorius