Comments for Reza's Rants

Comment on Stepper Motor Controller Code Update by admin

admin — Thu, 26 Aug 2010 19:12:22 +0000

I’m unfamiliar with the drv8811, why did you chose it? And I’ve not done pwm on the msp430 but I’m sure you should be able to find some information online or from the datasheet.

Comment on Stepper Motor Controller Code Update by Pulkit

Pulkit — Fri, 18 Jun 2010 05:52:07 +0000

hi reza,
i am a beginner, trying to drive stepper motor with MSP430. to start with i have chosen DRV 8811 as the suitable option as a stepper driver. Is their any other option or is it the best one?
and i am also trying to generate PWM from MSP430, So would you please guide me through this.

Comment on Stepper Motor Controller – USB interface by admin

admin — Mon, 07 Jun 2010 08:01:37 +0000

Thanks for the offer. I’ve not had a chance to play around with the code much as of late. What I want to implement next is a way to ramp the rate up and back down so that the motions are not so abrupt. Been toying with a way to tweak the clock rate — but have not tried anything yet. Let me know what you are interested in working on.

Comment on CNC Success by admin

admin — Mon, 07 Jun 2010 07:59:25 +0000

Yeah, it’s a bit of a pain dealing with the arduino-ness of it all, but my goal is to make it more accessible to more people, and the arduino platform is quite popular. been meaning on building an arduino shield which incorporates the stepper hardware to make it even simpler.

Comment on CNC Success by admin

admin — Mon, 07 Jun 2010 07:58:08 +0000

Thanks. Just uploaded R17 with the fix. -reza

Comment on Human trials proceed by Andy

Andy — Tue, 11 May 2010 02:22:15 +0000

Hello Reza, I’m very ashamed for my rude action to ask fou your PCB design! Please forgive me!
According to your advice, I work very hard to design my own sch and PCB!
But it is very difficult for a newer!
Frankly speaking, I can’t understand how to select the best frequency of a DAC and Whether I need an analog Multiplexer/Demultiplexer to separate the DC component and AC component or any better choice. Could you give me some advices?
Any help is appreciated.
Thanks a lot!
yours sincerely,
Andy

Comment on CNC Success by Bob W

Bob W — Tue, 20 Apr 2010 19:38:46 +0000

I have been playing with your code to use on either Pic32mx or an Arm – which for me, means making it compile as a ‘C’ program and working around the ‘FAVORS’ Arduino and G++/C++ seem to do.

Anyway, in the R16 version of rsteppercontroller.pde – in your setup() function, you need to move the first call to getMaxFeedrate() after the call to init_steppers() – xaxis, yaxis, zaxis are initialized in init_steppers(), and being pointers, that could be an problem.

void setup() {
…
_feedrate = getMaxFeedrate();
//reprap init code
init_steppers();

Keep up the good work.
Bob.

Comment on Bluetooth working – found culprit appliction – FixCamera.exe!! by George Gulie

George Gulie — Tue, 16 Mar 2010 09:18:47 +0000

Man!!! you are a life saver! I Bow Down on Thy Feet!
I was just about to call CSR and tell them something very nice about their mamas… after 3 days of digging…

Thank again!

Comment on Stepper Motor Controller – USB interface by David Armstrong

David Armstrong — Thu, 04 Mar 2010 14:54:52 +0000

certianly interested in the usb smc project , if you need help shout if an extra pair of hands always helps ( and brain )!

dave

Comment on Stepper Motor Controller Update by Rechargeable Shaver

Rechargeable Shaver — Wed, 17 Feb 2010 03:34:57 +0000

Thanks for such an interesting post, it is great!