CSS / Hardware Reference : Joerger SMC Stepper Motor Controllers

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	Motors Counters MCA Interfaces

Hardware reference : Motors : Joerger SMC Stepper Motor Controllers

Joerger SMC Stepper Motor Controllers

Interface:

CAMAC

Manufacturer:

JOERGER

config file

CA_SMC = slot_number
CA_KS3640M = slot_number

edconf: DEVICES screen

Slot    Module  Unit          Description 
   1       SMC     0          Joerger Single Motor Controller 
   2   KS3640M     0          KS 3640 Counter with Joerger SMC

Joerger controller models SMC-L, SMC-24 and SMC-LP can be used with spec . None of these models contain absolute motor position registers, so they are generally supplemented with additional CAMAC counter modules to keep track of motor position. spec supports the Kinetic Systems 3640 Up/Down Counter for this purpose. This module has four 16-bit counters that must be connected in series to form two 32-bit counters. One 3640 module is thus needed for each two SMC modules.

The SMC controllers can be used without a supplemental counter, but spec will not do as well in keeping track of absolute motor positions.

The Joerger controllers have no provision for a soft abort. If you type ^C to abort moving, the controller will simply stop sending pulses to the motors. Inertia may cause the motors to continue to turn a bit, and absolute positions will be lost. The only work around for this problem is to keep motor velocities low.

The model SMC-LP allows programmable motor speed and acceleration. According to the module's documentation, if the internal frequency adjustments are at the factory settings, motor speed can be programmed between 50 and 2000 steps per second, while acceleration time can be varied from 20 to 2000 msec. For the other models, these parameters are set manually using potentiometers on the module - values entered in the config file are ignored.

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