This page documents various stepping motor controllers built in EDF
over the years.


=== New Super-K Power Box ===

This box is designed to be driven by the Hytec 2256 VME module, or any other source
of step/direction pulses

* [[Hytec_Notes]]
* Schematic [http://joule.bu.edu/~hazen/SteppingMotors/step_motor-rev2_sch.pdf PDF]
  [http://joule.bu.edu/~hazen/SteppingMotors/step_motor-rev2.sch ExpressPCB]
* [[Stepping_Motor_Design_notes]]
* Finished Layout 6/30/06
   [http://joule.bu.edu/~hazen/SteppingMotors/step_motor-rev2.pcb ExpressPCB]
* [http://joule.bu.edu/~hazen/SteppingMotors/StepMotor2a_Nov07.zip StepMotor_Nov07a.zip]
  Updated CPLD design which de-energizes motor when not stepping
 * [http://joule.bu.edu/~hazen/SteppingMotors/step_cpld.zip step_cpld.zip]
* [[SuperK_Box_Rev2]]
* [http://joule.bu.edu/~hazen/SteppingMotors/Project1.zip Project1.zip]
  project for testing stepping motors from PC parallel port.
  See [[Visual_Basic_Stepping_Motor_Notes]]

=== Old Power Box for MACRO/Super-K ===

This is a Bud box with a 12V power supply, a PCB and 3 connectors (DB15, DB25 and 20 pin header).
It provides power switching electronics for a 5V motor.

* [http://joule.bu.edu/~hazen/stepping_motors/power_box_sch.pdf PCB Schematic]
partly-legible original!  Component references may not be 100% correct.
* [http://joule.bu.edu/~hazen/stepping_motors/power_box.sch ExpressPCB file]
  (no PCB layout done)

== Commercial Modules ==

* [http://www.hytec-electronics.co.uk/2256.html Hytec 2256]
  step/direction outputs for 4 motors.  No power drive electronics.
  [http://joule.bu.edu/~hazen/DataSheets/Hytec/2256_User_Manual_IssueC.PDF User Manual]

=== El-Batanouny Lab ===

Three-motor control in rack-mount box.  Uses 3 "power box" boards,
wired to a DB-25 connector on the rear panel.  

* [http://joule.bu.edu/~hazen/stepping_motors/elbat_new_box.pdf Documentation]
  - Revised 10 Feb 2006

=== Control Basics ===

The Airpac motors we have lots of from a surplus lot are configured like this:

:http://joule.bu.edu/~hazen/SteppingMotors/stepper1.gif

This is the standard step sequence:

|| ||A||B||C||D||
||1||ON||-||-||ON||
||2||ON||-||ON||-||
||3||-||ON||ON||-||
||4||-||ON||-||ON||

===  Other Links  ===

* [http://www.cs.uiowa.edu/~jones/step/index.html Jones on Stepping Motors]
 * Suggest L298 and LMD18200 chips (Digi-Key has both)