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by Inventor_Tommy
Tue Jul 29, 2014 8:12 am
Forum: Automation, sensing and robotics
Topic: Pi Biped Robot walking
Replies: 17
Views: 12686

Re: Pi Biped Robot walking

Thank you :-)
by Inventor_Tommy
Tue Jul 29, 2014 12:44 am
Forum: Automation, sensing and robotics
Topic: Pi Biped Robot walking
Replies: 17
Views: 12686

Re: Pi Biped Robot walking

Hi I am keen to get started on a similar project. Do you have an instructables or have your code available on github or another opensource location? It would be really great if your code was shared :-) It would make robotics 101 available for the novice and robotics learner (myself :-)). Regards Inv...
by Inventor_Tommy
Mon Jul 14, 2014 11:34 am
Forum: Advanced users
Topic: 4 Phase Stepper Motor and CNC Application
Replies: 13
Views: 4326

Re: 4 Phase Stepper Motor and CNC Application

Ivan

Perfect mate, that is definitely something I understand. Wish me luck creating my interface cable.

Thank you so much for your time :-)
by Inventor_Tommy
Mon Jul 14, 2014 10:08 am
Forum: Advanced users
Topic: 4 Phase Stepper Motor and CNC Application
Replies: 13
Views: 4326

Re: 4 Phase Stepper Motor and CNC Application

Can you point me in the direction of some information in regards to interfacing the Pi with the parallel interface of a bipolar driver?
by Inventor_Tommy
Mon Jul 14, 2014 9:51 am
Forum: Advanced users
Topic: 4 Phase Stepper Motor and CNC Application
Replies: 13
Views: 4326

Re: 4 Phase Stepper Motor and CNC Application

Ivan At the risk of sounding even more like an idiot I can only find drivers that have a parallel interface. The raspberry pi does not have that. However I did find on eBay a driver that has a step/drive input and apparently it does the translation and it has the A-, A+, B-, B+ outputs. It is the A4...
by Inventor_Tommy
Mon Jul 14, 2014 12:43 am
Forum: Advanced users
Topic: 4 Phase Stepper Motor and CNC Application
Replies: 13
Views: 4326

Re: 4 Phase Stepper Motor and CNC Application

OK

So I got the following motors that are "made for CNC applications". However they still have 4 wires. Anyone know of a driver I can use with the raspberry Pi to interface with these stepper motors?

http://www.ebay.com.au/itm/231162408535 ... 1439.l2649

Tom
by Inventor_Tommy
Fri Jul 11, 2014 2:55 am
Forum: Other projects
Topic: Nema17 and LinuxCNC
Replies: 5
Views: 2768

Re: Nema17 and LinuxCNC

I do have another solution with some hardware I have lying around from another project. I have 2 x ULN2003 drivers with 2 x BYJ48 stepper motors. I can drive these motors successfully in python with 1001, 1010, 1100 etc commands sent to the driver. However there is no configuration available or a .h...
by Inventor_Tommy
Wed Jul 09, 2014 4:58 am
Forum: Other projects
Topic: Nema17 and LinuxCNC
Replies: 5
Views: 2768

Re: Nema17 and LinuxCNC

Would something like the A4988 be OK? http://www.robotdigg.com/news/26/Reprap-Stepper-Motor EBay link: http://www.ebay.com.au/itm/New-A4988-StepStick-Stepper-Motor-Driver-Module-for-3D-Printer-Reprap-Heat-Sink-/380703784502?pt=LH_DefaultDomain_15&hash=item58a3b6be36&_uhb=1 I am looking for a cheap s...
by Inventor_Tommy
Wed Jul 09, 2014 3:24 am
Forum: Other projects
Topic: Nema17 and LinuxCNC
Replies: 5
Views: 2768

Re: Nema17 and LinuxCNC

Hi Ivan

Are you able to point me in the right direction of a pre-made L297 stepper motor driver capable of driving 3 motors?

Regards
Tom O'Brien
by Inventor_Tommy
Wed Jul 09, 2014 12:35 am
Forum: Other projects
Topic: Nema17 and LinuxCNC
Replies: 5
Views: 2768

Nema17 and LinuxCNC

Hi I am not a n00b to the Raspberry Pi, Python or programming. What I am new to however is using a stepper motor with the Pi. I am looking to build a CNC machine that I can send a file to over Wireless and launch LinuxCNC (which I have compiled my own kernel) and start cutting. What I have: - 3 x Ne...
by Inventor_Tommy
Tue Jul 01, 2014 3:59 am
Forum: Advanced users
Topic: Raspberry Pi CNC
Replies: 2
Views: 1848

Raspberry Pi CNC

Hi I know there is already a plethera of posts out there for creating a CNC machine with a Pi. However.......... I have compiled my own kernel and got Linuxcnc EMC2 working on my Pi. However I am new to stepper motors and drive/step pins. I have 3 x Nema17 4 wire bipolar motors and 3 x HG7881 H-Brid...
by Inventor_Tommy
Mon Jun 02, 2014 11:58 pm
Forum: Advanced users
Topic: 4 Phase Stepper Motor and CNC Application
Replies: 13
Views: 4326

Re: 4 Phase Stepper Motor and CNC Application

No problems. Thank you for your quick answer. I will get some bipolar stepper motors and see how I go :-)
by Inventor_Tommy
Sun Jun 01, 2014 10:56 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 329481

Re: LinuxCNC

Hi, I have a post at http://www.raspberrypi.org/forums/viewtopic.php?f=29&t=78523&p=558450#p558450 However I was wondering if my question could be answered here: I am trying to build a CNC machine from my Raspberry Pi. I did some research, purchased some 4 phase stepper motors (28BYJ-48) with a ULN-...
by Inventor_Tommy
Sun Jun 01, 2014 8:32 am
Forum: Advanced users
Topic: 4 Phase Stepper Motor and CNC Application
Replies: 13
Views: 4326

4 Phase Stepper Motor and CNC Application

Dear All I am not a newbie by any means to Python, the RPi or real world applications. However I have hit a road block and wondering if there is any way around my problem that follows without purchasing new hardware? I am trying to build a CNC machine from my Raspberry Pi. I did some research, purch...

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