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Laser Engraver: ArduinoMega2560+Ramps1.4+drv8825

alex97545

Laser Engraver: ArduinoMega2560+Ramps1.4+drv8825
January 24, 2019 12:43PM

Registered: 5 years ago
Posts: 4

I have bought a laser [www.aliexpress.com]
And I've built a coordinate table wich consist of axis X and Y but I didn't find pins in the firmware (It is attached) where I should plug in the laser power 12v+- and ttl+- with ramps 1.4.
I've read other topics so I burned one arduino and I didn't understand how I should plug in the laser.

Thank you

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Attachments:
open | download - 1.PNG (71.5 KB)
open | download - 2.PNG (68.5 KB)
open | download - GRBL_RAMPS1_4.rar (466.4 KB)

frankvdh

Re: Laser Engraver: ArduinoMega2560+Ramps1.4+drv8825
January 24, 2019 01:30PM

Registered: 9 years ago
Posts: 978

The +12 & GND on the laser are connected to the power supply.

It looks like this software is for a CNC machine with a motor-driven spindle. I guess you could use the motor on/off signal to turn your laser on/off, in which case you would connect the laser ttl+ to D10 and the the ttl1 to GND.

What wattage laser did you buy? Please post back how well it works.

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alex97545

Re: Laser Engraver: ArduinoMega2560+Ramps1.4+drv8825
January 24, 2019 08:54PM

Registered: 5 years ago
Posts: 4

I bought 1wt laser. And I've connected everything you told me but the laser turns on when I turn on the power supply, and it just always works without any interrupt.

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alex97545

Re: Laser Engraver: ArduinoMega2560+Ramps1.4+drv8825
January 25, 2019 01:34PM

Registered: 5 years ago
Posts: 4

Quote
frankvdh
The +12 & GND on the laser are connected to the power supply.

It looks like this software is for a CNC machine with a motor-driven spindle. I guess you could use the motor on/off signal to turn your laser on/off, in which case you would connect the laser ttl+ to D10 and the the ttl1 to GND.

What wattage laser did you buy? Please post back how well it works.

I connected the laser power 12V to the pin D10 and it works well with interrupts, but the laser works only at 0% or 100%. So now I'm going to find out what pin is connected to ttl.

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cozmicray

Re: Laser Engraver: ArduinoMega2560+Ramps1.4+drv8825
January 27, 2019 04:29PM

Registered: 11 years ago
Posts: 1,049

Laser should be connected to 12V supply

from DZT 's Store website ---- PWM/TTL:support . TTL 0v off ,5v on

so supplying 5V to the TTL should trigger (turn ON) the laser

The TTL is modulated by a PWM signal from controller to get various power output
(longer pulse width --- more laser ON time)

What firmware and software are you using?
Many of SW programs allow selection of how laser is triggered.

confused smiley

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alex97545

Re: Laser Engraver: ArduinoMega2560+Ramps1.4+drv8825
January 28, 2019 12:28AM

Registered: 5 years ago
Posts: 4

Quote
cozmicray
Laser should be connected to 12V supply

from DZT 's Store website ---- PWM/TTL:support . TTL 0v off ,5v on

so supplying 5V to the TTL should trigger (turn ON) the laser

The TTL is modulated by a PWM signal from controller to get various power output
(longer pulse width --- more laser ON time)

What firmware and software are you using?
Many of SW programs allow selection of how laser is triggered.

I'm using this firmware GRBL_RAMPS1_4.rar, and these programs Grbl Controller 3.6.1, inkscape 0.92

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cozmicray

Re: Laser Engraver: ArduinoMega2560+Ramps1.4+drv8825
January 30, 2019 08:04PM

Registered: 11 years ago
Posts: 1,049

Grbl Controller 3.6.1 sends G-code to your control board
What inkscape laser plugin are you using?
The plugin will determine the Laser ON/OFF and power level
G -code commands

[jtechphotonics.com]

confused smiley