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GMH Endstufen

GMH is the name of a series of ministep bipolar chopper drives, suitable for driving two-phase stepping motors, with four, six or eight terminals.

GMH drives are realized in single EUROPA format cards (100 x 160 mm.) and are equipped with a 32 pole, DIN 41612 form D connector. They are therefore designed to be assembled inside a RACK, complete with motherboard, that could be supplied as an option by R.T.A.

R.T.A. research has led to the realization of a component offering superior performance concerning resolution, as well as operating smoothness and high reliability at competitive costs.

The wide range of resolutions permits to optimize the application of GMH series drives with a wide variety of control systems.

Particular care has been dedicated also to obtain low acoustic noise and reduced motor mechanical vibrations while standard input and output signals ease interfacing with the most common control systems.

  • Operation at 400, 800, 1600, 3200 and 500, 1000, 2000, 4000 steps/revolution.
  • Motor phase current setting by means of a DIP-SWITCH.
  • Up to four possible equidistant values between Inf. min. and Inf. max. can be set.
  • Automatic current reduction at motor standstill.
  • Possibility to switch off motor current with an external logic signal.
  • Protection against a short circuit at motor outputs.
  • Protection against under-voltage and over-voltage.
  • Overheating protection.
  • Operation with a single external power supply.
  • High efficiency CHOPPER with MOSFET final stage output.
  • Two separated and co-working electronic circuits to ensure acoustic noise and mechanical vibration reduction at low and medium speed.
Vdc Inf. min. Inf. max. Dimensions
(VOLT) (AMP) (AMP) (mm.)
GMH 05 from 55 to 85 1.6 3 100 x 160 x 30
GMH 06 from 55 to 85 3.5 6 100 x 160 x 30
GMH 07 from 55 to 85 7 12 100 x 160 x 45
GMH 09 from 100 to 180 7 12 100 x 160 x 45

AVAILABLES OPTIONS

It is foreseen the possibility to "sandwich" mount various optional cards, meant to expand the drives' processing and interfacing. For more information about their characteristics please go to OPTIONAL CARDS page.

Euroracks 19", 12,5" o 10,5" con motherboard MM series and power supply PS series are availables on request for multy axis applications. For more information about their characteristics please go to RACK page.