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by MrGreg
Tue May 14, 2019 10:30 pm
Forum: Other projects
Topic: stepper motors rattling
Replies: 4
Views: 584

Re: stepper motors rattling

The symptoms you describe looks like supply rail noise problem. The noise is actually caused by the stepper motor. It occurs with varying intensity related to the stepper speed (pulse rate - frequency ) A solution for this problem would be to put a capacitor between Gnd and Vmot as close as possible...
by MrGreg
Mon Oct 15, 2018 8:45 pm
Forum: Automation, sensing and robotics
Topic: 1945 Craftsman lathe CNC Conversion
Replies: 7
Views: 1365

Re: 1945 Craftsman lathe CNC Conversion

I am not too familliar with exactly what a " Craftsman 101.07403 lathe" is, but I understand it is about 12" hobby type machine? Yes? Or is it something else? One of the first things to do is choose a suitable stepper motor. Nema xx is a motor frame size specification. it does not tell you much abou...
by MrGreg
Wed Oct 10, 2018 7:01 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 328805

Re: LinuxCNC

Errrr... No Those instructions were for Raspbian Jessie only and are now rather outdated. Raspbian Jessie is still useable. I am still running Jessie on my cnc setup, although it is for cnc only and not for general use, eg anything to do with the www or other activities likely to comprimise security...
by MrGreg
Thu Oct 04, 2018 1:28 pm
Forum: Automation, sensing and robotics
Topic: Adjustable Photodiode input
Replies: 2
Views: 601

Re: Adjustable Photodiode input

Ideally you prob want to post this problem on an electronics forum. However I will suggest how you may go about doing this without getting into detail. You will likely need to up your game on the electronics side though? So... Suggest you pulse the laser with a square wave 50% duty cycle at a standa...
by MrGreg
Fri Aug 24, 2018 5:12 pm
Forum: Automation, sensing and robotics
Topic: Universal G-Code sender on Rpi3
Replies: 5
Views: 9714

Re: Universal G-Code sender on Rpi3

You might find bCNC runs much better on the RPi. It is python based and is much the same as UGS in both style, function and GUI interface UGS is java based and can have problems with the backplot visualiser. There is also a launcher in the bCNC Master folder ( bCNC with a cog icon) https://github.co...
by MrGreg
Tue May 29, 2018 9:11 pm
Forum: Automation, sensing and robotics
Topic: Sending G-code to a TinyG v8
Replies: 2
Views: 662

Re: Sending G-code to a TinyG v8

You want to be in the same directory as the location of the file for the command to work. I'm guessing you were in your home directory Eg "pi" So.. cd into Desktop ( where your .txt file is) from console ( command line terminal) ...and try it again Might find this helpful for useful commands to get ...
by MrGreg
Sun Apr 29, 2018 10:50 am
Forum: Automation, sensing and robotics
Topic: Universal G-Code Sender - Visualizer
Replies: 2
Views: 1717

Re: Universal G-Code Sender - Visualizer

UGS is java based and does not play well with the RPI.
Try this

https://github.com/vlachoudis/bCNC

It is almost identical to UGS but is Python based and runs well on the RPi
by MrGreg
Sun Apr 01, 2018 11:26 am
Forum: Automation, sensing and robotics
Topic: LinuxCNCPi - and Board
Replies: 4
Views: 2566

Re: LinuxCNCPi - and Board

That's quite a "Wish List" If you have not already seen this, A good place to start....... https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=33809 The above setup runs fine for me, although not quite meeting your prescriptive ideal. Currently only Jessie supported out of the box. Couple of add...
by MrGreg
Sat Feb 03, 2018 7:33 pm
Forum: Automation, sensing and robotics
Topic: Automatic bartender
Replies: 7
Views: 1542

Re: Automatic bartender

I don´t really understand it, especially how BT communication works.
I guess you better get aquainted with Arduino Bluetooth comms then......

This might help

http://www.martyncurrey.com/
by MrGreg
Fri Feb 02, 2018 12:33 am
Forum: Automation, sensing and robotics
Topic: Automatic bartender
Replies: 7
Views: 1542

Re: Automatic bartender

I think you can use what you have already got. (might be a bit too easy though?....And no RPI) Firstly your Arduino needs to be a genuine or near perfect clone running at 16Mhz. There are many clones that only run at 12Mhz which cause all sorts of problems and wont work properly. Load GRBL onto the ...
by MrGreg
Thu Feb 01, 2018 8:09 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 328805

Re: LinuxCNC

It's all a little out of date.... The following should work OK Take a look here for the Machinekit and RT inatall http://www.machinekit.io/docs/getting-started/installing-packages/ Also read through the "For Starters" links on the left of the page for more general background info. Also FYI... There ...
by MrGreg
Wed Jan 24, 2018 11:32 pm
Forum: Automation, sensing and robotics
Topic: Machinekit crashes in config selection
Replies: 3
Views: 942

Re: Machinekit crashes in config selection

If you want an "out of the box" working solution from Machinekit then you will want to be using Jessie. If you go for Stretch, then you will be presented with a repo of thousands of RT kernel options. I have no idea which, if any, work?! Suggest you check out the Machinekit install guides before you...
by MrGreg
Tue Jan 23, 2018 9:47 pm
Forum: Automation, sensing and robotics
Topic: Machinekit crashes in config selection
Replies: 3
Views: 942

Re: Machinekit crashes in config selection

I guess you are trying to get Machinekit running on the old RPIv1B. It does work OK but the Axis GUI is rather slow and notchy. The xenomai version runs much better than the RT version. The Mini gui interface is quicker, but can leak memory over a few hours You don't need to compile it, there are bu...
by MrGreg
Wed Jul 27, 2016 9:22 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 328805

Re: LinuxCNC

Using Linux CNC <aka Machinekit>on an RPI for gcode simulation is like using a sledgehammer to crack a peanut... Ha Ha.! This is a suggestion, not a recommendation... Type "gcode simulation" into the Add / Remove software (Main Menu - Preferences) There are a few to choose from, "yagv" looks promisi...
by MrGreg
Fri May 20, 2016 8:54 pm
Forum: Troubleshooting
Topic: RPi3 Wifi problem & Onenine case
Replies: 0
Views: 406

RPi3 Wifi problem & Onenine case

There would seem to be a problem with the Oneninedesign (RPI2) case breaking the RPI3 Wifi hardware circuit. RPI3 wifi large.jpg This is a view of the problem area. The circuit from the wifi chip (the black thing next to the SD card) goes to the filter (White thing with spot on it) via a couple of r...
by MrGreg
Mon May 16, 2016 9:12 pm
Forum: General discussion
Topic: Internal serial number or MAC from Raspbian?
Replies: 6
Views: 1806

Re: Internal serial number or MAC from Raspbian?

Got it, thanks

( Gosh! There is a whole lot of stuff in that log)

Much appreciated

MrGreg
by MrGreg
Wed May 11, 2016 9:29 pm
Forum: General discussion
Topic: Internal serial number or MAC from Raspbian?
Replies: 6
Views: 1806

Re: Internal serial number or MAC from Raspbian?

Cheers !
I'll have a rummage around in there

Thanks
by MrGreg
Wed May 11, 2016 9:01 pm
Forum: General discussion
Topic: Internal serial number or MAC from Raspbian?
Replies: 6
Views: 1806

Internal serial number or MAC from Raspbian?

I need to find the internal serial number or MAC from Raspbian. I do not have the physical RPi to do a cat /proc/cpuinfo. I do still have the SD card with the raspbian install that was the operating system for the RPi in question. So... Is the Serial number or MAC, or any other unique identifier for...
by MrGreg
Mon Nov 17, 2014 10:49 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 328805

Re: LinuxCNC

As Wire suggested, you need to change the SCALE= value in the .ini file. These will be under the AXIS sections toward the end of the .ini file for each of your axes. You shouldn't need to change anything else if that solves your problem. There are other parameters to tune if you still have problems ...
by MrGreg
Thu Aug 21, 2014 10:40 pm
Forum: Automation, sensing and robotics
Topic: Pi to CNC
Replies: 1
Views: 785

Re: Pi to CNC

by MrGreg
Mon Jun 02, 2014 10:33 pm
Forum: Advanced users
Topic: 4 Phase Stepper Motor and CNC Application
Replies: 13
Views: 4320

Re: 4 Phase Stepper Motor and CNC Application

Bite the bullet and go for bipolar.
They are deal easier to use and if you are building something cnc, likely you will need all the IO you can muster for other functions.
by MrGreg
Mon Mar 31, 2014 9:45 pm
Forum: Automation, sensing and robotics
Topic: i've the hardware, i need help with the code (miniCNC 3axis)
Replies: 1
Views: 853

Re: i've the hardware, i need help with the code (miniCNC 3a

@ 2. See http://www.cnc-club.ru/forum/viewtopic.php?t=35 This works well, although Inkscape EXtreeeeeeemly slow on a Pi. So you might want to generate your gcode on something a bit quicker @3. Contacting the original author(s) would seem the best bet first. I note there is no comments/questions on l...
by MrGreg
Sun Aug 11, 2013 9:31 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 328805

Re: LinuxCNC

@ All I have not posted on this project for some time as I have been busy testing and re testing various iterations of Kinsa's lcnc for RPi. I guess around 100+hrs of actual cnc time (bench test rig) and prob another 50+hrs tinkering about & trying stuff. So in reverse order: The latest version http...
by MrGreg
Thu Aug 08, 2013 10:16 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 328805

Re: LinuxCNC

@ Beutrocks

We are sliding off topic and back into a stepper discussion again.......!

Re your Question
Errrr NO you really don't want to do that!
See, for all info on Pololu's

http://www.pololu.com/catalog/product/1182

Back to RPi LinuxCNC :)
by MrGreg
Sat Aug 03, 2013 9:42 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 328805

Re: LinuxCNC

what do you think about it? I think this stepper discussion is sliding off Topic ! However The 6560 is commonly employed in Cheap Chinese type stepper drives. Eg http://www.ebay.co.uk/itm/3-Axis-TB6560-CNC-Stepper-Motor-Driver-Board-1-5A-3A-/360702098206?pt=UK_BOI_Industrial_Automation_Control_ET&h...

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