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Messages - Stonemull

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General Discussion / Re: Made for my wife today
« on: Today at 10:22:56 AM »
heh ok, i just saw the user was 'spannerhands' and figured it was you.

Z Axis / Re: my Z Axis
« on: Today at 08:53:23 AM »
where is the stl for this one ? it looks interesting ..

General Discussion / Re: Made for my wife today
« on: Today at 08:50:42 AM »
Wild Bills on thingiverse !
wheres the beer holding one ?
awesome, I owe you 10 likes for the laser mounts you sent me to uplaod

Had to login to like your wine holder and holy crap, adafruit themselves 'liked' my last upload .. I feel like royalty.

FAQs For New Users / Re: pwm modification
« on: Today at 08:43:54 AM »
CH340 is the usb-serial chip used just FYI.

T2 Software Updates / Re: Updates
« on: Today at 08:41:10 AM »
Just want to thank Zax again for giving me 0.025mm resolution.
fixed all my PCB etching issues I think, no more visible lines in the track, much more solid.
also not having to rename drill files so T2 imports the excelion along with the copper gerber .. awesome work, I didnt even ask :)

General Discussion / Re: Help on Z-axis reference
« on: Today at 08:36:49 AM »
what speed are you using, grbl breaks when you go too fast..

Projects / Re: PCB photoresist film exposure
« on: Today at 08:35:45 AM »
I just knocked up a board and decided to document it in a little more detail showing software used and chemical strengths etc.
too many photos in one lump to add here so stuck it up on imgur in an album. did a couple of vis too but not uploaded them yet .. will do shortly.

General Discussion / Re: Help on Z-axis reference
« on: December 10, 2017, 05:29:03 AM »
D12 is standatd Z input, not sure if default grbl uses multiple home switch inputs or not, on mobile so not wading through code.
plenty of info on the grbl wiki, suggest having a read.

General Discussion / Re: Help on Z-axis reference
« on: December 09, 2017, 05:04:35 AM »
ok, 1.1f has it enabled by default, I suspect the T2 version has it compiled with it disabled as lasers generally have no Z axis or limit, so you will need to install the regular 1.1F from github or compile your own.

from config.h

// NOTE: Defaults are set for a traditional 3-axis CNC machine. Z-axis first to clear, followed by X & Y.
#define HOMING_CYCLE_0 (1<<Z_AXIS)                // REQUIRED: First move Z to clear workspace.
#define HOMING_CYCLE_1 ((1<<X_AXIS)|(1<<Y_AXIS))  // OPTIONAL: Then move X,Y at the same time.
// #define HOMING_CYCLE_2                         // OPTIONAL: Uncomment and add axes mask to e

General Discussion / Re: A3X rewired with flatcable
« on: December 09, 2017, 04:49:55 AM »
awesome !
very neat.

General Discussion / Re: Help on Z-axis reference
« on: December 09, 2017, 04:47:29 AM »
I have not tried a home switch on Z axis, is that what you mean by reference ?
If so, you can tell grbl to home only one axis I think with configuration bits.
If not, you could add a startup line to the reboot to raise Z axis 50mm on connection then drop 30mm say, jam it into the top end stop.
You could add a switch and connect it to the probe input and run a probe command.
Apart from that, you might need to compile your own version from source, the home command sequence is a little bunch of well commented lines and from memory, Z axis is not in the default sequence.

its doable but a lot of work and I have enough hobbys. I would probably tackle the pcb design if someone else wants to do software.. thats more work than fun for me.
without looking i am not sure the esp has enough I/O though you could expand it with a 23s17 or similar.

The killer is that grbl is designed from low level to use bit manipulation for the ports (all byte wide) and that would need a bit of shuffling to port across to what I assume is no longer byte access?
Perhaps starting with the mega2560 port would help, then you have a bunch of interrupts to ensure the same oevel of functionality.

not sure how you deal with 2 cores and how they communicate .. it could be as easy as sticking something like esp-link on the Rf core and a grbl port on the second, then you just need a virtual comport between them.

the display would be cool, might go looking at some new modules..

I did nothing clever, just plugged the esp serial from the node mcu directly into the mana se 'bluetooth' connector, the nodemcu has a volltage divider on the esp Rx so no need to be concerned with voltage levels.
software .. from memory i used Serial-TCP snd set up a virtual com port, set T2 to the virtual port and off it goes. I think installing serial-tcp destroys T2's anility to scan the available ports though, it is not the only casualty so it must break a windows function.

Oh yeh, I totally forgot it had no USB.. I'm stubborn to and would waste hours frigging around.

Since it takes files off SD then it may not even try and stream data off the serial, might just be a debugging port or programming port, it might be able to stream data if you knew the command to tell it to use the port.. so it's a long shot at best.

However, if you did want to have a look, you probably just need a USB-serial device, most likely a 3.3v one. I would suggest a CO2102 version, less driver hassles than with FTDI clones.
Plug it into Tx to Rx, Rx to Tx and ground

If you wanted to learn new stuff you could grab yourself a nodemcu board (esp8266) and program it with esp-link and use it as a wifi to serial device, I have driven my laser with one, in this case though its probably better to find a new hobby and wait for the Mana SE :)

Heh, welcome ti chinese lasers :)
The 80 is steps/mm .. which for a 16tooth cog is standard, 32mm per rotation, 200 steps per rev * 16 microsteps.
The little pots on the driver boards set the motor current, the motors can run up to around too hot to touch without issues. Dropping the pot will reduce current but also make it more likely to skip steps and redude top speed and torque. grbl has a setting to release the motors when not in use after just a split second if you want. I suspect the motors on a corexy need a bit higher torque, might be wrong..
SF might be max speed, 3000mm/min is about right.
If you connect to the laser with a serial program then you can interrogate the board and get a lot of data,  sending it $$ for instance returns all of the parameters, not sure what version you have, just knowing that would help .. assuming its grbl. Then you could cross reference those numbers agaibst what you see on front panel.

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