Recent Posts

Recent Posts

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21
Motor Control / Re: Arduino BED stepper Manual Control
« Last post by MarkN on May 30, 2015, 11:34:07 PM »
G'day All, well the rat is leaving the ship.
I have cooked 2 more Arduino boards, and seem to be having all sorts of troubles. The problems are mostly generated by myself, so I am not giving up on the fact that arduino controlling my stepper is unobtainable.
I have jumped ship, to the CNCZONE, and have currently on order 2 different units, which may do the job, or not.
http://www.ebay.com.au/itm/290972177693?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

...and this one also.
http://www.ebay.com.au/itm/191492110623?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

So that is that. I will keep an eye on this site, for advancements, and thank all participants.
Luck to us All,
Mark Needham
22
Motor Control / Re: Arduino BED stepper Manual Control
« Last post by MarkN on May 10, 2015, 08:31:22 PM »
G'day All. As is obvious with the lack of postings, I have done bugger all. Heart attacks, cyclones and other stuff has interfered and now I am moving house. Hopefully, I shall get this beasty working, but just not at the moment. My milling machine is currently in storage, so.yeah, may  take a while.
But if anyone, manages to get this all to work in the meantime, be great to hear from you.
Cheeers, Mark N
23
General Discussion / Good starter kits for kids.
« Last post by jdave on April 11, 2015, 03:27:01 PM »
Hi everyone.   I've been tinkering with stuff professionally and casually all my life(I'm 59) and I'm happy to see my 13 year old grandson showing an interest in electronics and mechanics as well.  I'm looking for some advice on good beginner kits for a kid that age.  I don't live close enough to help him out with things like soldering or advanced techniques so I'm looking right now for very basic kits based either on breadboard or snap together type construction.  Right now I'm leaning towards Arduino or perhaps Lego.  He's had Lego kits and enjoyed them so that would be an extension of what he already is familiar with.   But they can make anything look wonderful online, I'd like to hear from folks who have had actual experience with products because reality is always different from the advertising.
      Also, my ten year old granddaughter has been determined since she was six that she's going to be an architect.  I realize it's a bit off topic but if anyone knows of any kits or software that would be good for her I'd be glad to hear about it as well. 
        Many thanks, and keep on tinkering.
24
Motor Control / Help with using Arduino to control brushless motor
« Last post by earslan on April 05, 2015, 07:30:53 PM »
Hello everybody,

I am working on project and I am kind of lost. I want to build a quapcopter by using arduino and motor driver (rather than just ESC). I want to build my own ESC. I have been trying to use that site as a guide (http://elabz.com/bldc-motor-with-arduino-circuit-and-software/) I already have motor with max current 15A (http://www.hobbyking.com/hobbyking/store/__21478__NTM_Prop_Drive_28_26_1000KV_235W.htm) I am wondering if the current of the experiment can be applied to my motor? 

If I will take these codes as a guide would that be enough for me to make the motors spin strong enough?
25
Web Programming / New Trends in Deal Business
« Last post by refola on March 25, 2015, 09:43:18 AM »
Groupon introduced a new trend in the field of daily deals software by becoming one of the fastest growing start-up companies. Overall price value of Groupon Company is estimated to be a whopping thirty billion dollar. Living Social is another groupon website which recorded huge growth in recent years. Proper marketing and utilization of web technology is essential to succeed in online business world. Wordpress theme is used in most daily deal software. PayPal, Google Check out and Amazon payment are the most prominent payment mechanisms listed in a typical daily deal package. Social media is a great way to promote online business in this era of internet superhighway. Countless number of business organizations offer attractive discounts to their customers in a deal package. Amazon, Outpost and Get.com are some reliable sources of getting information about daily deal offers.
Cell phones, computers and digital gadgets belong to the most popular items sold in daily deal offers. Concept of Groupon buying is being adopted by many prominent business organizations all over the globe. Group buying software is known as a powerful ecommerce platform built specifically for collective buying. It is said that daily deal site will give a boost to online business initiatives. Introduction of groupon popularized the idea of collective buying in a very short time span. Daily deal sites keep popping up all over the web thanks to the pioneering efforts of Groupon founders. Daily deal website builders became a sensational hit among technical wizards. Deal sites offer fabulous rebates on gift card, electronic books as well as training courses.
26
General Discussion / BLDC motor controller
« Last post by titu11500 on February 07, 2015, 08:07:06 AM »
hello, first time posting something. i have to design a motor controller for a 48V BLDC using an Arduino, only to control the speed. i have looked into many videoes and other pages and found out that 6 power MOSFETs is the most common circuitry for the PWM, but couldnt find any clear schematics. also i need help in the hall sensor circuitry(as my BLDC doesn't have a bulit-in). so please could anyone guide me to the right schematics that would give the desired results.

Thank you.
27
Motor Control / Re: Arduino BED stepper Manual Control
« Last post by MarkN on October 05, 2014, 10:42:05 AM »
G'day All.
            Got lots of new bits, finally.
Will plug 'n play. Soon as I've got some new stuff to chat about, I'll let you all know. 'specting some more smoke. Just love it. That acrid smell of money, snorting up ya nose....... Got to love it, hey!
28
Motor Control / Re: Arduino BED stepper Manual Control
« Last post by MarkN on September 19, 2014, 01:08:51 AM »
Ta Nick. waiting for more "blow up fodder". Will post photos then, see if I can replay the last explosion. I do have a small stepper  So I'll prove concept first, and play further after that.
Cheers mate.
Mark Needham
29
Motor Control / Re: Arduino BED stepper Manual Control
« Last post by ElectroNick on September 16, 2014, 11:07:20 PM »
Hi Mark,

Sorry it took me so long to chime in here. Did not have much time for the forums lately.

Here is my take on the situation: there is a way to make your own driver out of a whole bunch of MOSFET transistors (need two per an end of a bipolar stepper, and it has four ends, so 8 transistors), a heap of MOSFET drivers (IC that makes TTL control of a MOSFET easier) and a heatsink(s). So, it's a pretty involved device. And the issue of microstepping as well as current sensing and feedback would still have to be solved. You can use an Arduino as a stepper driver, but it will run out of available I/Os really quickly. With all proper feedback, you might not even get to control two steppers with one Arduino.

So, that's where the proper dedicated driver becomes so important. I would have to admit, for a powerful motor I would much prefer using a specialized IC rather than trying to use an Arduino as a driver, although this sounds like a fun project. Trying to bootstrap the Allegro chip used in Easy Driver to a  too powerful a motor won't probably do much good. I cannot say I know much about more powerful chips, sorry.

But as far as trying to get SOME rotation out of a freewheeling stepper, even a powerful one, using an Easy Driver, I think you should be able to use that schematic with the code at this site that you referred to without any modification with one caveat: the code here was written for the Allegro A3967 chip, whereas BED board has the newer Allegro A4988. I have not tried that one yet.

If you have ENABLE connected as per the schematics, try to disconnect it (it will make it always enabled and lead to excessive heating), and see if your motors at least twitches. The code assumes that each button press results in 160 microsteps (or 20 full steps if in 1/8th mode), so it should result in something like 18° angular movement of the rotor.  You cannot mis-wire the motor itself (it can only be wired to rotate in a wrong direction, easy to correct later), so don't worry about the motor, double-check the other important connections - Step and Direction

Anyhow, see if you can post more details, a picture perhaps, of your setup, I will try to be more helpful.

Cheers,
ElectroNick
30
Motor Control / Re: Arduino BED stepper Manual Control
« Last post by MarkN on September 15, 2014, 06:41:26 PM »
Reckon the Heatsink, I used for the chip, has "leant across" and shorted out a couple of the SMD's.  Still waiting for new driver. Have bought 10, normal Easy drivers, and will use TIP120 to up the "Extra Current"
https://www.youtube.com/watch?v=79Zk5tQRTEQ    for TIP120 details
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