miniE - 2x16 UI - version 1.0

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First of all Airic, many thanks for providing the code for Mini Engine, I really appreciate the hard work which has gone into producing it.  I have built myself a camera slider using your code, which leads me to a couple of observations.
The design of the limit switches is such that the system 'fails dangerous' rather than 'fails safe'. As the limit switches use normally open contacts which when closed indicate the limit has been reached, if one of the wires to the limit switch becomes disconnected (for example by being broken or a connector becoming dislodged), the limit switch will not work, resulting in MiniEnginr continuing to move the trolley when at the end of its travel. As the Mini Engine is designed to be used unattended in some cases, this could mean the motor being driven for quite some time against the limit, with potentially dire consequences.  
The behaviour when the limit is reached can lead to a quite violent reversal of the direction of travel of the trolley. This appears to be because when the limit switch is detected. the behaviour of the code is to immediately reverse at the same speed as you were going forward, by the same distance as when you were going forward. I would like to suggest a slightly different approach for the next version (if you are thinking of releasing one):
1. Limit switch detected
2. Pause for a moment (configurable?)
3. Reverse at say 1/2 the forward speed (or the minimum speed) until the limit switch is released (i.e JUST far enough for the limit switch not to be operated).

I also seem to have an unusual stepper motor driver, in that MOTOR_SLEEP_PIN is HIGH to put the motor to sleep, whereas it is hardcoded as LOW in MINIE. Might I suggest 2 new #defines which are used to set the motor awake or asleep?
#define ASLEEP 0
#define AWAKE 1
That way if there are people with unusual drivers, they can just change the #defines rather than having to change every occurence of MOTOR_SLEEP_PIN (and possibly miss one or more)

Once again many thanks for MiniEngine!

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I too would like to know how to move the carriage to the end of the track (limit switch location).
I also shot normal video and I would like to be able to set the speed of the carriage during the  'move to a limit switch'. With that function I could move the carriage to a limit switch, then start my video camera and move the carriage to the other limit switch at a pre-determined speed.

Is there any way to do this with the current code, or do I need to start doing some programming?
Thanks for MiniE - saved me lots of time !

Hi, just a simple question. Is there a function in miniE that allow the stepper to rapidly move the dolly carriage to one end of the rail (until it reach the limit switch)? I've not yet set the home positionof the motor and the carriage is in the middleof the rail. In principle I'd like to know a reasonable way to operate manually the motor in the fastest way. Thanks, Gigi

Hey!
Does anyone know if you can get one of these:
http://dynamicperception.com/products/stage-zero-replacement-motor-mx2-power-lead (minus the MX2 leads because it's going into Arduino)
But possibly cheaper + if possible, more suitable to this project.
I'm currently using a Stepper Motor, but it's just not powerful enough to carry a 5DmkII up or down inclines, it can't hold the camera if I'm doing 60º timelapses and it's making me sad.

Would anyone recommend a DC motor other than the one above?

And is it true that DC motors are greater than Stepper Motors?

Cheers
&

Hello

I've got an Easy driver v3 on a shelf ...pinning is ok but what about the code and functionnality ...?
The sleep pin is not present in the v3.0 EZdriver board

Regards

hi there,
i was staring at the code the last days, but i´am to dumb to understand it all ...
do you think its possible to port your minie engine to work with a geared dc motor.

i´ve got the dc robot input shield in combination with the arduino motor shield r3 and an arduino uno 
every pin on the arduino is used in this combination.
2 for the motor, 2 for the cam and the rest for the shield.
but i diddnt get it how and where to recode all the stuff -.-

i know a dc geared motor is much less accurate, but on the other side it uses much less power than a stepper.

would be so nice if somebody could help me :)