Stepmotorer

Stepmotorer

Stepmotorer

Stepmotorer – Præcis bevægelse til specifikke positioner

Stepmotorer er en form for elmotor / elektromotor hvis bevægelser kan styres i små vinkeltrin. Dermed er de mere præcis end almindelige elmotorer / elektromotorer. Stepmotorer anvendes eksempelvis til at flytte læse/skrivehovedet i CNC-værktøjsmaskiner, printere, og diskdrev. Men også i robotter og lignende steder, hvor det er vigtigt at kunne bevæge noget hen til en specifik position bestemt i forvejen. For at opnå den præcise styring, må man gå på kompromis andre steder. Bl.a. er stepmotorer mindre energieffektive end almindelige elmotorer /elektromotorer.

Leverandører af Stepmotorer:

Elcor Sønderborg N A/S

Grundtvigs Alle 165-169
6400 Sønderborg
Tlf.: 73 12 12 12
E-mail: eegholm@eegholm.dk

eegholm.dk

Se hele vores produktprogram og profil her

GCM A/S

Redstedsgade 15
6400 Sønderborg
Danmark
Tlf.: +45 74 42 18 64
E-mail: info@gearcentralen.dk

gearcentralen.dk

Se hele vores produktprogram og profil her

Powermec ApS

Møllevej 9, L21
2990 Nivå
Tlf.: +45 49 14 66 60
E-mail: info@powermec.dk

powermec.dk

Se hele vores produktprogram og profil her


Mere viden om en Stepmotor:

Som i almindelige elmotorer / elektromotorer findes der i stepmotorer et antal elektriske spoler og muligvis permanente magneter, men hvor almindelige elmotorer / elektromotorer af sig selv omkobler strømmen i spolerne så motoren bliver ved med at køre videre, skal der til stepmotorer anvendes ekstern elektronik for at kunne levere strømpulser til de forskellige spoler i den korrekte rækkefølge.

Hver impuls får stepmotorens akse til at dreje sig en ganske bestemt vinkel, f.eks. 45 eller 15 grader eller mindre. Så ved at levere et bestemt antal impulser kan man få stepmotoren til at dreje sin akse med enhver vinkel, der er et helt multiplum af 45°, 15° eller mindre. Når en stepmotor er ved den ønskede position, kan man opnå en såkaldt "holdestrøm" i de spoler, der modtog den sidste impuls: Således virker stepmotoren som en slags bremse- eller låseanordning der søger at fastholde motorakslens aktuelle position.

Stepmotorer


Præcis information i cockpittet med FAULHABER stepmotorer


11.feb 2025


Præcis information i cockpittet med FAULHABER stepmotorer

Whirlwind with Swiss Clockwork.

Beginning with something extraordinary and then going even further with every detail that’s how one could describe the concept of car manufacturer Bugatti. For the display of the upcoming luxury model “Tourbillon,” something truly special will be presented. Instead of a digital version, the driver will see a genuine Swiss timepiece behind the steering wheel. The dashboard of the new hyper sports car is packed with the finest mechanics from Concepto’s workshops, where movements for the most prestigious names in the watchmaking world are crafted. FAULHABER stepper motors translate the electronic signals from the car’s onboard computer to the hands of the cluster.

Describing the Bugatti Tourbillon without falling into clichés like “breathtaking design” and “uncompromising technology” is a challenge. Superlatives seem to wear out quickly due to their abundance: a top speed of 446 kilometers per hour, acceleration from 0 to 200 in under 5 seconds, and a starting price of 3.8 million euros are just a few highlights of this car.

The drivetrain for the new model, set to launch in 2026, has been completely redeveloped. It is based on a complex system of electric motors, a V16 naturally aspirated engine, and the latest generation eight-speed dual-clutch transmission. “It was important to us that this car retains the pure and unadulterated analog feeling of a combustion engine while also combining it with the agility and capabilities of electric motors,” the manufacturer adds.

Pinnacle of Watchmaking

The French word “Tourbillon” means “whirlwind,” which perfectly suits this unique vehicle. The name also references an invention by Abraham Louis Breguet, a titan in the world of watchmaking. He honed his craft in 18th-century Switzerland before moving to France much like Ettore Bugatti, the Italian who founded his legendary sports car factory in Molsheim, Alsace, in 1909. Today, Bugatti vehicles are still manufactured there under the same prestigious name.

The Tourbillon is a highly complex and delicate mechanism that compensates for the effects of gravity on the accuracy of pocket watches and wristwatches. Today, these masterpieces of precision engineering are mainly crafted in La Chaux-de-Fonds, including at Concepto. Valérien Jaquet, who founded the company in 2006, is an admirer of Breguet and a remarkable watchmaker himself. In less than two decades, he has turned Concepto into one of the most important suppliers of watch movements to the major brands. Among its achievements, Concepto has developed the world’s thinnest mechanical watch, which is just 1.70 millimeters thick. In addition to the Tourbillon, the company offers movements with all conceivable complications.

When Bugatti decided to create a mechanical display for its latest vehicle, Concepto was the natural choice as a technical partner. The car also has a fold-out digital display in the center console with all the functions expected in a modern vehicle, but the speedometer in the driver’s direct line of sight had to be something truly exceptional.

Stepmotor

Dimensional Leap and New Electronic Territory

“Bugatti wanted a display that not only resembled a high-end Swiss wristwatch on the outside but one that also utilized the same type of mechanics on the inside,” says Guillaume Tripet, who leads the Bugatti project at Concepto. “From this idea, the concept of a large circular display in the center with two smaller satellite displays to the left and right was born. It’s reminiscent of a classic wristwatch with multiple complications except here, instead of a stopwatch or moon phase, the central vehicle data is displayed, along with the exquisite mechanics behind the hands.”

The complex movement consists of 600 parts, all of which needed to be developed from scratch. While Concepto also produces desk clocks and has larger movements in its portfolio, the display in the Bugatti requires components up to 80 percent larger than these. The company’s machines first had to be adapted for this without compromising the usual precision of their production.

Another challenge was integrating the mechanics with the car’s onboard computer and the electric motors. The vehicle’s drivetrain, fuel, and battery data are collected by electronic sensors and sent to the central computer. For this information to appear on a mechanical display, a “translator” is needed. This task is performed by eight FAULHABER stepper motors, which are also manufactured in La Chaux-de-Fonds. These motors move the hands by converting the electronic signals directly into precisely counted motor steps.

Highly Heat Resistant and Fast-Reacting
The pinpoint conversion of control signals into highly precise movements is a strength of all FAULHABER stepper motors. For this project, additional requirements and high hurdles in motor selection had to be met. The electromechanical display sits almost freely suspended on the steering column and has only a shallow depth. This limited space—alongside the intricate mechanics—had to accommodate eight stepper motors. The AM0820 and AM1020 models, with diameters of 8 and 10 millimeters, respectively, were selected.

Each motor moves one hand, meaning four motors are housed in the left satellite with its three display elements. These four are the only ones connected to the hands solely via a worm gear, while the other motors have a more complex transmission that is visible through sapphire glass. This component was custom developed by FAULHABER for this application, as was the motor control, which translates the measurement signals into hand movements or holds a stable position if the value remains unchanged.

“The display must always be easy to read, which is why numerous LEDs are integrated in the cluster,” explains Guillaume Tripet. “It’s also exposed to direct sunlight in its prominent position, making the inside extremely warm, especially as the limited space only allows for a single ventilation opening. On the other hand, the motors must also operate immediately after starting on a freezing winter day. They must start up without delay and manage very high loads relative to their small size, over long periods and without loss of performance.”

The FAULHABER motors used in the Bugatti Tourbillon operate in a temperature range from minus 30 to plus 120 degrees Celsius. In terms of precision and reaction time, they meet all the requirements set by the Concepto engineers. Comparable products would only achieve the required performance with larger volumes. In pre-production, the drives have already proven that they perform flawlessly in the cluster and also pass test series such as the vibration test. Guillaume Tripet: “We are now perfecting the system so that the latest hyper sports car can be delivered with this exceptional display in time for the launch.”


Eegholm – Har du et transportbånd, hvor du har behov for at positionere emner præcist?




Eegholm – Har du et transportbånd, hvor du har behov for at positionere emner præcist?

PKP stepmotoren fra Orientalmotor har en opløsning på 200 step/omdrejning – en kompakt stepmotor med højt moment og lav varmeudvikling.

Det maksimale drejningsmoment for stepmotoren er omkring 1,2 – 1,7 gange højere end en standard PK-stepmotor i samme byggestørrelse. Stepmotoren opnår det samme høje drejningsmoment som en standard PK-motor i en større byggestørrelse, hvilket betyder, at anlæggets størrelse kan reduceres tilsvarende.

Lav varmeudvikling forlænger stepmotorens levetid
Varmeudviklingen i en motor er ofte en medvirkende faktor til at forkorte en motors levetid. Varmeudviklingen hos PKP-serien er betydeligt reduceret i forhold til andre motorer i samme byggestørrelse. Her er tale om en temperatursænkning på mere end 10 °C. Den lavere varmeudvikling giver motoren en markant længere levetid og gør, at motoren er velegnet til kontinuerlig drift.

Stepmotor bruger mindre energi
Stepmotoren bruger 30 % mindre energi i forhold til sammenlignelige produkter fra PK-serien. Desuden kan mindre strømforsyninger og drivere anvendes og på den måde reduceres CO2-udledningen yderligere.

7 grunde til at vælge stepmotoren

  • Stepmotor har en opløsning på 200 step/omdrejning (1,8 °/ step)
  • Højere drejningsmoment end en standard PK-stepmotor i samme byggestørrelse
  • Bredt udvalg af byggestørrelser fås fra 20 mm op til 60 mm
  • Reduceret varmeudvikling giver markant længere levetid
  • Mulighed for gear
  • Velegnet til kontinuerlig drift
  • Energibesparende

Tekniske data

  • Faser –  2 faser
  • Step – 0.05-1.8
  • Moment – 0,014 – 4 Nm
  • Byggestørrelse – 20 mm / 28 mm / 35 mm / 42 mm / 56,4 mm / 60 mm

Kontakt

Tag kontakt til Poul-Henning Nielsen på telefon 4035 8654 eller send en mail til phn@eegholm.dk. Poul-Henning vejleder dig gerne til den rette løsning.


Eegholm – Stepmotor vs. servomotor – Hvorfor er stepmotorer en smartere løsning?




Eegholm – Stepmotor vs. servomotor – Hvorfor er stepmotorer en smartere løsning?

Grunden til, at stepmotoren er en bedre løsning til præcisionsopgaver end f.eks. servo- og andre motorer, skyldes blandt andet, at andre motortyper hurtigt ville blive meget varme, hvis de skulle fastholde motoren på en nøjagtig position.

For hvor f.eks. servomotoren bruger strøm til at holde motoren på den givende position, når den står stille, bruger stepmotoren kun strøm, når den kører. Men for at holde position bruger den kun den halve strøm til at holde magnetfelt. Derfor bliver den ikke nær så varm, selv om den arbejder præcist.

For stepfunktionen sørger for, at du dels kan styre motoren helt nøjagtigt, og dels at motoren holder positionen helt præcist, så snart den er standset. 

Det betyder, at stepmotoren også har et meget lavere strømforbrug. 

Vælg mellem to forskellige former for stepmotorer
Der findes mange forskellige typer og udformninger på stepmotorer. Men hos Eegholm kan du grundlæggende set vælge mellem to typer:

  • AZ-stepmotorer – der har indbygget ABZO sensor/Absolut encoder i motoren, så den hele tiden ved, hvor den står. Det betyder, at den altid kan køre videre til næste step eller køre videre fra der hvor den står, hvis der opstår strømsvigt.
  • PKP-stepmotorer – en lidt billigere model, der kan fås med same præcision, men kræver en ekstern controller. Derfor skal den køres i tilbage i udgangspositionen/reference igen efter et strømsvigt.

Den væsentligste forskel på de to motorer er, at du ikke behøver at tage alt ud af f.eks. en pakkemaskine efter et strømsvigt, hvis du vælger en AZ-stepmotor. Den vil fortsætte derfra, hvor den var kommet til, når strømmen kommer igen.

Andet nyt fra Eegholm

Med PKP-stepmotorer er du nødt til at tage alle produkter og emballager ud af maskinen, nulstille alle motorer og køre i reference. Det kan hurtigt gøre det tidskrævende og dyrt at genstarte maskinen efter et strømsvigt. I værste fald kan det føre til forsinkelser i de aftalte leverancer, som maskinen pakker.

Du får et overblik over de forskellige stepmotorer hér

Kontakt
Har du spørgsmål, så giv Poul-Henning Nielsen et kald på ☎ 4035 8654.


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