SORTED in desperation and having read many many forums and threads, One thing that kept coming through was poorly documented driver wiring. So I decided to change the TTL wires around and it suddenely began working as required and is fully adjustable. On startup I get a quick blast of the laser, but think I read somewhere of adding a 10kohms resistor across the + / - to prevent this. next thingby sauntson - Laser Cutter Working Group
Maybe I should try this. To run my Laser I need to find a 5v PWN connection on my MKS 1.4 Gen Ramps Board, I thought I had already remapped D9 to Pin44 by adjusting pins_ramps.h. When tested with my DMM I get varying readings at the pins depending on the S setting of my M106 eg M106 S127 = 2.48v Attaching my Laser and then powering the system, I get no laser on startup, which I understand isby sauntson - Laser Cutter Working Group
UPDATE I have just rechecked my settings and can conform this using M106 S255 the TTL wires have 4.95v The Laser out on the driverboard is measured at 3.52v M106 S127 the TTL wires have 2.29v The Laser out on the driverboard is meansured at 2.84v hope this helpsby sauntson - Laser Cutter Working Group
I think I understand what your saying. I should apply the 5v from the controller and measure the power going to the laser from the driver board???. Sorry had a problem understanding your reply. 1.5v from the battery are enough voltage. I already know that I can contolr the output voltage using M106 S0-255 and the output voltage is accordingly set from the control board. I'll go now and checkby sauntson - Laser Cutter Working Group
Hi I feel progress is being made I disconncted the TTL wires and attached them to a 1.5v battery. My thinking be if the TTL was working then the laser should come on at a lower power. wrong, powering the system, with the battery attavhed. resulted in no Laser, disconnect the batteryand laser somes on full power does this suggest anything to you guys, ??? failed TTL side of laser driver??? regby sauntson - Laser Cutter Working Group
Thank you gentlemen, This is my aim. Ill connect an independant adjustable 5v source to the TTL side and see what happens. i have already grouped the earths together. i was reading last night about debugging using M43 but have never done that before so that will be a massive learning curve, I am thinking by adding an independant 5v to the TTL. It would show if i have power, so long as it worksby sauntson - Laser Cutter Working Group
If I knew how to most probably sorryby sauntson - Laser Cutter Working Group
This is my issue I remapped D9 to Pin44 to get a 5v+ for TTL. When I had adjusted the Marlin and reflashed. Using a multimeter I got these results between Pin44 and GND M106 S255 = 4.98v M106 S127 = 2.54v M106 S40 = 0.48v M106 S0 or M107 0v So I connected the TTL wires from my tested pin44 and Gnd to the Laser driver board and sendng any M106 codes I get a very very very dim light, even on M1by sauntson - Laser Cutter Working Group
Quotecozmicray The TTL trigger is not a voltage dependent control. The trigger pins normally are pulse width modulated (PWM) to control laser output More time ON ( at 5V) the greater the laser ON - more power. So you have to set up your control pin to PWM or select a pin that can set PWM frequency Read THANKYOU SIR I thought I had dont this by routing D9 too D44, im new to all this and quiby sauntson - Laser Cutter Working Group
I recently purchased one of these I adjusted the Marlin on my MKS Gen Ramps1.4 board to use pin 44 for the TTL+5v Trigger and AUX GND for the -5v Before attaching the laser, I used a multimeter to test my adjustments When M106 S255 and multimeter, I get an expected (4.97v) S127 (2.48v) using M106 S0 or M107 I get 0v Now the bit thats confused me, After connecting the Laser driverboard to aby sauntson - Laser Cutter Working Group