Indexing tables rotate a workpiece or assembly through a series of fixed stations, with each indexing move needing to land precisely at the same position cycle after cycle across potentially millions of cycles over the equipment’s service life. Positioning drift that would be tolerable in many applications compounds into real production quality issues on an indexing table, where each station’s tooling and processes assume the workpiece arrives at exactly the same point every time.
Ever-Power’s PC+NMRV helical-worm series is specified into indexing table applications across Australian manufacturing and assembly automation, where the combination of low backlash, self-locking station holding, and compact right-angle output suits this demanding positioning duty. This page covers the technical fit for indexing table drives, three manufacturing facility deployments, and answers to specification questions from equipment designers.
| Demande de tableau d'indexation | Réponse de conception PC+NMRV |
|---|---|
| Position de station constante sur des millions de cycles | Le pré-étage hélicoïdal à faible jeu minimise l'accumulation des erreurs de positionnement |
| Maintien de la position pendant les opérations en station | L'étage de sortie à vis sans fin autobloquant maintient la position sans couple d'asservissement continu. |
| Indexation rapide entre les stations | Helical stage’s higher input speed compatibility supports fast indexing motion |
| Encombrement réduit sous la table | La configuration de sortie à angle droit s'adapte aux dimensions standard des tables d'indexage. |
Point sensible : Une table d'indexage d'assemblage multi-stations présentait une dérive de positionnement progressive sur des séries de production prolongées, attribuée à une accumulation de jeu dans le mécanisme d'entraînement d'origine.
Solution: Le remplacement PC071+NMRV050, offrant des performances à faible jeu confirmées, a maintenu un positionnement constant de la station tout au long de campagnes de production prolongées.
Résultat: La cohérence du positionnement a été maintenue lors des cycles de production à grand volume suivants après la mise à niveau.
Point sensible : Une table d'indexage pour tests électroniques nécessitait un temps de cycle plus rapide entre les stations pour répondre à une augmentation du rythme de production, sans compromettre la précision de positionnement requise pour les équipements de test.
Solution: PC063+NMRV040 specified for servo compatibility supporting the faster cycle rate while maintaining the table’s required positioning tolerance.
Résultat: Increased production cycle rate achieved while maintaining the testing station’s positioning accuracy requirement.
Point sensible : A precision machining facility’s rotary workholding indexer needed exceptionally reliable station holding during cutting operations, where any drift would directly affect part accuracy.
Solution: PC080+NMRV075 spécifié pour la combinaison d'un positionnement à faible jeu et d'un maintien autobloquant confirmé pendant le cycle d'usinage.
Résultat: Consistent part accuracy maintained across the indexer’s production schedule following installation.
| 🏭 Manufacturing Precision — over two decades of production experience extended across both gear stages of the helical-worm combination series |
| 📡 Indexing Application Engineering — confirm the correct combination against your station count, cycle rate, and positioning tolerance requirements |
| 🔧 New Equipment Design Support — OEM configuration options for indexing table manufacturers developing new equipment |
| 💰 Factory Direct Pricing — competitive cost from prototype development through to full production manufacturing volumes |
The helical pre-stage’s lower inherent backlash compared to a worm-only input reduces the rate of positioning error accumulation over extended service life. Actual long-term accuracy depends on your specific load, ratio, and duty cycle — we can discuss expected performance characteristics for your application during specification.
The gearbox itself drives the table’s rotational positioning; the number of index stations is determined by your table and tooling design rather than the gearbox. Provide your station count and required index angle per cycle, and we will confirm the appropriate ratio for your specific indexing pattern.
Yes, the NMRV worm output stage’s self-locking behaviour above the standard ratio threshold holds the table in its indexed position without requiring continuous servo holding torque, which is valuable during station operations like machining or precision assembly where positional stability matters.
Achievable cycle rate depends on your specific ratio, servo motor capability, and the table’s mechanical design including inertia and required index angle. Provide your throughput target and table specifications, and we will confirm whether your target cycle rate is achievable with the appropriate gearbox configuration.
Oui, nous accompagnons les concepteurs d'équipements depuis l'idée initiale et le développement du prototype jusqu'à la production en série, en garantissant la cohérence des spécifications tout au long de l'évolution de votre conception. Faites appel à notre équipe dès les premières étapes de votre processus de conception pour bénéficier d'un accompagnement optimal à l'intégration.
PC+NMRV units typically carry a higher unit cost than standard NMRV due to the additional helical stage, reflecting the improved backlash and efficiency performance. Whether this premium is justified depends on your specific positioning tolerance and cycle rate requirements — we can advise on whether your application genuinely needs the helical-worm combination or whether standard NMRV meets your needs at lower cost.
Découvrez toute la gamme de vers hélicoïdaux sur notre site page de la série PC+NMRV, ou parcourez d'autres applications d'automatisation sur notre page des applications.
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