RE: [CAD_CAM_EDM_DRO] Encoders on stepper motors.

If Art takes you up on this offer and needs any help with the programming to
read the DRO card I will be glad to help. With Tom Kulaga's help I was able
to take apart his Turbo C program and write my own custom program to read
the board in QBasic.

Tim
[Denver, CO]

> In a properly constructed driver, with the properly set software
> configuration and a proper machine you shouldn't lose any steps, however,
> in addition to what other folks have mentioned there is stepper motor
> resonance problems to content with. Just take some steppers and
> lay them on
> the bench and do a G02x1.y1.i2 command and watch the motors as the
> transition from one direction to the other. That is generally
> when you will
> note stepper motor resonance. The use of encoders and the
> software that can
> utilize encoders helps, if not eliminates this problem. Deskncrt and EMC
> both use the Kulaga/Mauch DRO boards to take encoder feedback and
> compare it
> to values set in the .ini files. If the error is greater than the
> zero(error) it tries to speed up the motor and if successful continues the
> toolpath. If the error is greater than the set value then the program stop
> all three axis and an error message is displayed. If you want to
> add encoder
> feedback to your program MC5 then I would be willing to donate an
> assembled
> board for the task. I guess the source code can be found in EMC
> Dan
>
> FAQ: http://www.ktmarketing.com/faq.html