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Messages - ggallant571

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General Discussion / Re: New wheels
« on: May 30, 2020, 10:31:15 AM »
Our system admin (Ralph) has an excellent tutorial on calibrating diode lasers for cutting. In it he details a method of setting up for cutting. He is also the author of BCL which I suspect supports different speed/power settings depending on whether you are cutting with or against the grain.

General Discussion / Re: New wheels
« on: May 30, 2020, 07:43:18 AM »
How about a picture or two???

Assembly Help / Re: Rebuild
« on: May 28, 2020, 04:21:49 PM »
Your L7 has one. Somewhere on this site I posted a schematic of my L7. There is not much to it.

Zax - you are getting pretty good at finding/fixing these DXF problems.

Assembly Help / Re: Rebuild
« on: May 27, 2020, 07:25:19 PM »
N/O would imply parallel wiring, one switch per axis. The port is set with an internal pull-up and held high until the switch trips. The switch closure shorts to GND.

Assembly Help / Re: Rebuild
« on: May 27, 2020, 04:36:55 PM »
You probably should check the source code. First to make sure limit switches are supported. Second to see which NO or NC is selected.

Assembly Help / Re: Rebuild
« on: May 27, 2020, 02:36:34 PM »
Careful - you will get a reputation as a real hacker!!

Assembly Help / Re: Rebuild
« on: May 27, 2020, 02:34:04 PM »
I build my own. If you like soldering I will mail a blank. The pcb shops run specials where you can get 5 boards for 5USD. Sometimes with free shipping. Have been looking into getting the fabrication also done. I started with a L7 and it was random. Bought an L2 which died in 2 minutes.

T2 Engraving / Re: T2 Language
« on: May 27, 2020, 01:19:33 PM »
I purchased a couple of ATmega boards with the onboard ESP8266. From Chine, zero documentation. Second option is to replace the AVR with an ESP32 and redesign the signal wiring interface board. We currently use plug-in modules for RTC and SD card so integrating them would save some assembly effort.

Which language is BCL written in?

Assembly Help / Re: Rebuild
« on: May 27, 2020, 01:09:25 PM »
If your laser has 2 wires then you need a controller with the on-board switching MOSFET.

T2 Engraving / Re: firmware for core-xy
« on: May 27, 2020, 01:03:41 PM »
Already working on rotary table fixture.

Attached is a simple gcode program to etch a square. Each side is 200mm and the speed is set 4800 mm/min. 4800 mm/min is 80 mm/sec and the elaped rime should be 10 seconds. It takes 15 seconds. Tried at 2400 and 1200 and the time were 29 and 54 secs.

My bed is approx 350x350. Edit as needed if your bed is less than 200x200.

T2 Engraving / Re: T2 Language
« on: May 27, 2020, 09:18:39 AM »
We have a few units installed at local greenhouses. The owners were eager to get involved but after a month lose interest. Common problem was it just works and once setup they do nothing. Guess that is a good thing.

We have a version, awaiting the virus to abate, at a local school where there are planting trays mounted over large fish tanks. It pumps water (with fish poop) from the fish tank into the growing vats where somehow the plants purify the water which is recycled back to the tanks and help feed the fish. I am not a biologist!!!! Computer also activates grow lights based on sunrise/sunset to simulate a natural environment. My wife used a version to grow quite a lot of lettuce (and other plants) this winter.

General Discussion / Re: New wheels
« on: May 27, 2020, 07:23:48 AM »
Bright light bulbs require fresh batteries. My died years ago. Now the gremlins hiding in "should be easy projects" are having a field day.

Trouble Shooting / Re: Laser hits dead spot when engraving
« on: May 27, 2020, 07:09:58 AM »
Looks too clean to be random, Can you post the source image? Does the location move if you change the speed?

T2 Engraving / Re: firmware for core-xy
« on: May 27, 2020, 07:06:10 AM »
If it is a constant I will put the correction factor in my host application. I currently have a separate application for etching wine glasses on a rotary table where the speed is adjusted based on the diameter of the glass. Thinking that a checkbox with machine type (aartesian, core-xy, rotary) would make life easier. Also add diameter if rotary. Am currently reworking this code to fit on a 3.5 inch Raspberrry Pi display.

Brain cell just triggered - could the core-xy adjustment be better handled by the host!!!!

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