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Messages - Stonemull

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1
General Discussion / Re: ESP32
« on: Today at 08:10:07 AM »
5v into the Vin pin, may or may not be enough though, tempted to short the protection diode but that could cause issues of I need to plug into the usb as  well at some point, so as per Schematic I stuck a 1117 on the board as well, cut the 5v track (or not, should make no difference) and power the esp via its 3,3v pin, one good thing about the 1117 used on the module is they can cope with being backfed.



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2
General Discussion / Re: ESP32
« on: January 21, 2019, 09:40:50 PM »
well as per post #7 I am doing the devkitv1 to nano board, will probably make a PCB tonight, hopefully the 3.3v signals will drive the standard 5v stepper drivers.
 I briefly considered sticking a WROOM on a nano footprint but it is somewhat wider than the available footprint so its not an option without making a raw esp32 chip with associated support if you wanted it that small, not even sure if thats doable.

3
General Discussion / Re: ESP32
« on: January 21, 2019, 08:16:20 PM »
still interested in what ?

pins on the 30 gpio version are 1 inch apart, I cant find a nodemcu right now to check, must have a dozen but no idea where a single one is lol, i think the entire board is 1 inch wide and pins 5mm or so less than that.

4
General Discussion / Re: ESP32
« on: January 21, 2019, 07:26:42 PM »
Ah, you are redoing the whole board, nice, I was considering doing that after testing but I doubt I have a reason currently.
I used the default pins that the esp32_grbl uses so I had no need to edit anything.

This is the module I got, turns out its not going to fit in a nodemcu environment anyway,  too wide, useful itself though so all good.
https://www.aliexpress.com/item/ESP32-Development-Board-ESP-32-ESP-32S-WiFi-Bluetooth-Dual-Cores-CPU-MCU-Board-IOT-For/32847642995.html

this is a module I am still waiting on which was to be used in my T100 tank chassis with the above, it is made for the ESP12 dev, which I am not sure how wide it is and I think was maybe a waste of $2 for use with an esp32, no major issue, I cant buy L298's for that price let alone a board to hold them.
https://www.aliexpress.com/item/NodeMCU-Motor-Shield-Board-L293D-for-ESP-12E-from-ESP8266-esp-12E-kit-diy-rc-toy/32879040827.html


5
General Discussion / Re: ESP32
« on: January 21, 2019, 07:09:02 PM »
ah I was using a module as mentioned, the Devkitv1 for a few reasons, one I wanted a nodemcu footprint esp32, it has a boot button as I am starting to hate the dual transistor automatic program method which can simply not work a great deal.
So 5v is not an issue.
Turns out the horrible array of crossed over pins I needed work out perfect to lay tracks the way I wanted to do it, only 1 soldered link needed.
so this is my current prototype, added a 3.3v reg so I have the option of 3 or 5v power, takining 5v to Vin, so far as I can tell that will work fine though I maybe have to short out the protection diode onboard to give me the full 5v to the reg, added a regulator on board as well though in case I need the option.
added the gerber as well in case anyone wants to etch a board or laser one up somehow.

note the schematic, I have not bothered with the limit switches, probe, reset and serial pins. the connected pins are X,Y and Z steps, direction, enable and spindle PWM only.

I came here to post these, will have a look at your stuff now..

6
General Discussion / Re: ESP32
« on: January 21, 2019, 04:28:45 PM »
After creating the footprints and looking at the ratsnest the standard grbl pin out is horrible for making a board, at least for a single layer one I was considering.
there is no room around the nano on the eleksmaker board for the wider device I used, so I was going to do a long board that placed the esp off the side towards the usb port.
Confused why I would need to augment the 3.3v, on a nano it is typically supplied by the usb chip at 50ma whereas on the esp it is via a 1117 and is 1A. Not even sure anything uses it??
The 5v rail though is used by the stepper drivers, I think I already hacked my board to get that from the inboard switch mode under the nano of its that standard? Can't find a Schematic for it atm.
I was going to get power from usb but that defeats the purpose of using a WiFi chip :)
I think with the board I have with the rather average ams1117 (not a proper low drop out, needs 1.3v overhead) and a protection diode the Vin needs to be 6v minimum if I power from the eleks 5v rail, I am rapidly losing interest reverse engineering the existing laser board, seems a few to many workarounds.
I do have to do a design for a new fume cabinet for controller that drives a big step per within the next few weeks so I might prototype something up for that to play with, I get someone to pay me to do it then.

7
General Discussion / Re: ESP32
« on: January 21, 2019, 12:45:32 AM »
My new esp32 for this job arrived this morning so had a bit of a look at doing this, I picked up an esp32 devkitv1 which is a 30 pin device much like a nodemcu footprint.
I realised that nether my plasma cutter or my adapted plotter are ideal for this as they both use a mega2560 so I am going to try it with the eleksmaker laser.
Downloaded firmware and it compiled with zero issues, grbl seems to be running happily on it and I can start T2 and connect to the board and it appears to run ok (over serial) with no steppers
I am going to start by making a board to convert the esp32 pin out to a nano footprint and see how it goes.

8
I had this once but I can't remember what I did to fix it, it was something simple, either I was using a dodgy usb port I have on the front of my pc or I had Cura open as well, my Cura likes to snaffle all the com ports though I only generated to sd card, it seems a bit evil about it too, had it mess up realterm as well, not just grab the port but cause issues.



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9
T2 Engraving / Re: T2Laser and 15W Laser Engraver
« on: January 16, 2019, 04:28:26 PM »
These low power lasers are going to struggle to even leave a mark on metal, the surface conducts heat away. Your material is designed to have the top physically removed with an engraving bit.

Perhaps you can mark it by painting it and hitting that with the laser, then cleaning off the paint but I very much doubt it.



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10
T2 Engraving / Re: T2Laser to raspberry pi
« on: January 12, 2019, 05:46:41 AM »
My cnc plasma cutter I used a ramps board (mega2560) and added a graphic lcd, WiFi, battery and sd card, compiled Marlin in cnc mill mode and that works ok. Has homing as well. Not sure if it's the cheapest option by the time it's done but I figured it needed to be isolated from the mains and any computers given the plasma shooting around, been on pause until I build a bench for it, I think I need to add a probe and z drive as well.

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11
Projects / Re: GoT scotch Glass
« on: January 12, 2019, 03:50:16 AM »
Started a rewatch last week too. Just downloading Expanse series 3 and better call saul series 4 atm though so sidetracked now..
nice glass, as somebody who owns a crazy amount of glasses cause I have one each for specific drinks and reasons I approve thoroughly.

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12
T2 Engraving / Re: T2Laser to raspberry pi
« on: January 12, 2019, 03:40:05 AM »
Not a pi but I have used an esp 8266 running esp-link and set up a virtual TCP-com port on the pc, worked fine. Just plugged the esp into the Bluetooth serial port. I think I documented somewhere here.
Just turned out to be more of a pain trying to align a remote laser with the work piece than the benefit, but if I had a really long etch to do it's still something I would consider.

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13
Mini CNC / Re: Waiting for my mill
« on: January 07, 2019, 11:36:52 PM »
Actual spitfire size..
That means you can fly it down to the shops to get milk

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14
Mini CNC / Re: Waiting for my mill
« on: January 04, 2019, 07:52:31 AM »
I hope it's 1:1 scale, be awesome

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15
Mini CNC / Re: Waiting for my mill
« on: January 03, 2019, 04:00:29 AM »
The only catch with estlcam is that it uses a modified grbl 0.9 I think. It can upload firmware s well and has a smart configuration tool but it's still a bit of trial and error, kind of annoying if you want to swap between estlcam and say flatcam or t2laser though.
It is also a little crankier about usb hubs, I can only use it plugged into the front of my pc and I think I modded the main board to power the nano from the main supply instead of usb, I forget the details now.

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