All about Stepper Motors

Stepper Motors (by Machine Designs)

The biggest advantage of microstepping is smooth operation and the elimination of resonance over its entire speed range, typically 0 to 3,000 rpm. Smooth operation permits full torque utilization and freedom from rattling and mechanical wear.

Motors and drives must provide high positional resolution in applications such as semiconductor fabrication. A 25,000 step/rev system attached to a 10-pitch leadscrew on an X-Y table can position a silicon wafer to one part in 250,000/in. This high positional resolution often eliminates gearboxes (and gear backlash) or other mechanical reducers otherwise needed to place wire bonds or test probes on exposed IC wafers. But many applications that do not need high resolution can also benefit from microstepping.

http://www.machinedesign.com/ASP/viewBDEArticle.asp?page=&catId=367&strArticleFileName=/BDE/Electrical/bdeee4/bdeee4_2.html

Microstepping myths (by Machine Designs)
http://www.machinedesign.com/ASP/strArticleID/56361/strSite/MDSite/viewSelectedArticle.asp

Stepper Motor Dynamics Analyzer
http://www.euclidres.com/apps/stepper_motor/stepper.html

Micro Motors
http://www.micromo.com/

Some Drives:
PMM-MD-23220-10 Stepping Drive

No Brasil:
Drive 3540 M (Micro passo)

Preciso, trabalha com resoluões de 1/2, 1/5, 1/10, 1/64 passo (operação uniforme e sem vibrações);

Drive Indexer 1240i (programável: software for Windows)

Setagem de corrente de 0,2 a 1,2 A e micro-passos (até 50800 ppr) por software;

Syncro - Soluções em automação.

LIGUE JÁ OU ENVIE UM E-MAIL E SOLICITE MAIORES INFORMAÇÕES
NÓS TEREMOS MUITO PRAZER EM AUXILIÁ-LOS
TEL: 0XX11-6946-4317 FAX: 0XX11-6946-9515
e-mail: syncro@syncro.com.br ou at@syncro.com.br

Microstepping IC´s:
www.allegromicro.com
Um CI que faz tudo !!
A3977 Microstepping DMOS Driver with Translator

±2.5 A, 35 V Output Rating
Low rDS(ON) Outputs, 0.45 Ohms Source, 0.36 Ohms Sink Typical
Automatic Current Decay Mode Detection/Selection
3.0 to 5.5 V Logic Supply Voltage Range
Mixed, Fast, and Slow Current Decay Modes
Home Output
Synchronous Rectification for Low Power Dissipation
Internal UVLO and Thermal-Shutdown Circuitry
Crossover Current Protection

Exemplo de uso se microstepping.
EGX-300