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use stepper motor as servo

Posted: Sun Apr 28, 2019 10:55 pm
by Abricos
A4954 Dual Full-Bridge DMOS PWM Motor Driver
Features and Benefits
• Low RDS(on) outputs
• Overcurrent protection (OCP)
▫ Motor short protection
▫ Motor lead short to ground protection
▫ Motor lead short to battery protection
• Low Power Standby mode
• Adjustable PWM current limit
• Synchronous rectification
• Internal undervoltage lockout (UVLO)
• Crossover-current protection
A4954-Datasheet.pdf
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New Bitmap Image (14).bmp
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Re: use stepper motor as servo

Posted: Sun Apr 28, 2019 10:56 pm
by Abricos
Board-Diagram.png
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Re: use stepper motor as servo

Posted: Sun Apr 28, 2019 11:05 pm
by Abricos
The TMC4671 is a fully integrated servo controller, providing Field Oriented Control for BLDC/PMSM and 2-phase Stepper Motors as well as DC motors and voice coils. All control functions are implemented in hardware. Integrated ADCs, position sensor interfaces, position interpolators, enable a fully functional servo controller for a wide range of servo applications.
Special Features
closed loop controlFOCposition modevelocity modedual encoder
csm_TMC4671-ES_ebc2079825.jpg
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Re: use stepper motor as servo

Posted: Mon Apr 29, 2019 9:48 am
by kb1gtt
Steppers are week, slow and 2A of drive is not very much. I dream of a DC motor with lots of amps which accepts the typical step and direction signals that are commonly sent to a stepper. See Stervo linked below.

viewtopic.php?f=13&t=1199

Re: use stepper motor as servo

Posted: Mon Apr 29, 2019 12:58 pm
by Abricos
@russian want BMW ETB which has 2 Stepper motor and 2 potenciometro inSide ...
the next step is to get feedback from potenciometro (if software is ready ) ...