Power on PWM / Z+ pins

Other Hardware General Electronics
1

Hi all..
big problems :slight_smile:

I trying to setup my 80 watt ( 10w output ) Diode laser modul to my arduino - cncshield with GRBL. but the laser cant run on 100 % power.

specs. on the laser says PWM 3 to 12 Volt, but the PWM signal on arduino is only 5 V. And when I run 100 % power I only get 4.25 V on the PWN on the laser.. 2.13 V with 50 % power.

I use 15 Amp PSU, and all core is 1.5 mm2 and the PWM signal is taking from Z+ pin

the power on the laser goes down to 10.79 V. with 100 % power. turnt off there is 12.24 Volt.

it run and work okay, just the problem the laser only works half :frowning:

Can anyone help my ? I think I do everything.. I also replace the Uno and cnc shield ( new ) replaced all wires .. Another PSU and the laser is brand new..

Regards.
Lars Plovmann

2

The laser data sheet is required.

4

Hi Mate..

Yes offcause, but this is what I have

Product Specification

Model ：FF80-EAIR

Heatsink Material：Aircraft Aluminum + Brass Shell

Luminous Color：Blue

Cooling Mode：Temperature sensor intelligent control + 10000 rpm 40mm cooling fan

Dimension ：4x4x12 CM

Can Cut/Engrave : MDF/Balsa/Paper/Wood/Fabric/Plastic/Leather/Plywood/Foam Paper/Anodized Aluminum/PVC

Module Input：40-80W

Optical power output ：10W

Wavelength ：450nm

Beam Shape ：0.08X0.08mm

TTL&PWM Modulation：YES, Compatible with Both TTL & PWM Modulation

PWM/TTL Input ：DC3.3V-12V

Drive Mode：External ACC

Safe temperature range：<60 ℃

Module weight ：200g ( The lighter the weight, the smaller the move inertia, the better the performance )

Life Time：10000-20000 hours

5

This is only a control input, not for power. I think that you can connect it directly to an Arduino PWM pin and your power supply.

6

Im not sure, because a lot of peoply say , yes its a signal to on / off laser, but also the signal controls the power. Zero volt is off, 6 V. is 50 % and 12 V is 100 % I dont know if its wrong, but my problem is the laser wont cut thru someting ( not enough power ) and there is only 4.25 V .. The specs. says PWM 3 - 12 V. perhaps meen my laser only runs around 30 %

7

Ohh forgot... That is the way I connected it to arduino , and it work, but not enough power..

Hope you understand my English :wink: im from denmark :slight_smile:

8

You can control the power by a DC voltage (0-12V) or by PWM. Stay a bit below 100% duty cycle so that the laser can distinguish a PWM signal from constant voltage.

9

Im not 100 %, but pretty sure I have to get the PWM up to 12 Volt before my laser works on full power..

Also like you wrote, Either by voltage or PWM. But again, I dont really know it, also therefore My question here :slight_smile:

10

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.