Laser tree to jackpot connection help

Software / Firmware Jackpot Board / FluidNC
1

Hello,

I have a LR4 that I built a few months ago and I am very happy with it. I own a laser engraver that I use to cut veneer but the working surface is only 400x400 mm. I want therefore to use my LR4 with the laser to have a bigger surface.

I have a Laser Tree LT-80W-AA PRO that came with the Driver Adapter P-DA-01.

I am an illiterate for electronics and I would need your help to understand how to wire it.

Based on the manual I have the following options.

  • directly connect the laser with the 3 pin connector to the Jackpot (no 3 pin connector on Jackpot)
  • connect the laser to the adapter and then the adapter to the Jackpot with a 2 pin connector (no 2 pin connector on Jackpot)

Am I correct to assume that I would have to strip the pin and connect directly the wires? If yes, can I connect directly the laser or do I need the adapter?

Here a link to the laser manual: Laser Manual

Here a picture of the adapter:

PXL_20251014_085109540
PXL_20251014_0851095401920×1446 269 KB

Thanks in advance for the help.

2

Its really easy: one of the connection in the board its for TTL+GND thats whats you are going to use to connect to the 5V output in the jackpot.

The other one says 12/24v input: thats the connection to the power source and the laser module: even if the input is 12v you should share the gnd connection to the board.

That adapter board should be used between the diode and the jackpot

Its been ages since i did my diode laser and answered from my head, i hope i didnt make a mistake.

3

Thanks for your reply.

So if I understood correctly you are telling me to use this two 2-pin connections on the Adapter and send them to the jackpot.

image
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This would leave me with 4 wires on the jackpot side.

Where exactly should I connect them?

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4

I have the same Laser Tree unit (on my SKR Pro v1.2 LR3). You do not need to connect the adapter module, as long as the laser module is the same voltage as the power supply for the Jackpot (the Laser Tree comes in both 12V and 24V options).

If both Jackpot and Laser Tree Laser Module are 24V, connect the + power (red) lead from the laser module to the 24V+ terminal of the Jackpot. Connect the GND (black) lead from the module to the 24V-(GND) terminal of the Jackpot, and connect the PWM (yellow) lead from the laser module to the PWM output terminal of the Jackpot.

Note that the Laser module requires at least 80W power, and the jackpot requires around 60W (I think), so the stock power supply from V1E may not have enough capacity to drive both units. You may need a more powerful (larger) power supply.

1 Like
5

Connect the signal pins to the 5V Out section, upper left in the photo you posted.

From the docs:

Input / Output / Module notes

  • gpio.26 can have a quick pulse when starting. If you are using a 5V pin for your laser gpio.27 is the better option for your enable pin.
1 Like
6

Ok. since my Laser is 12 V I will use an external power supply going to the Adapter and then connect the adapter to the Jackpot via the Adapter 2-pin connector GDN/PWM TTL on the Adaper and then on the Jackpot on gpio.26 OR gpio.27. Correct?

7

And run a common ground (but not positive power) line between the two power supplies/controllers.

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8

The adapter module MAY (or may not) provide this function already. The best way to tell would be to use a DMM (multimeter/Ohmmeter) to test for resistance between the -12V (GND) terminal and the PWM GND terminal on the adapter module. If there is 0 Ohms (or less than 0.5 Ohms) between the two, you probably don’t need a 5th wire. Otherwise, you need to tie the two power supply -(GND) wires together at a common potential (voltage).

9

So ultimately this is the configuration I need to use (as per Laser Tree manual):

image
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Withe the YELLOW wire going to gpio.27 and the BLACK wire going in the corresponding GDN on the Jackpot (top left in the pic below, the two connections on the left). I assume that this means there is no need to have a common ground between the power supplies.

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Correct?

10

Don’t make this assumption. It MAY be true, but you would need to measure with an ohmmeter to be sure.

Never connect an ohmmeter to a live circuit. Make sure that both power supplies are disconnected first.

2 Likes
11

Just wanted to close off this topic by confirming that the connection as specified above is working like a charm.

2 Likes
12

One last thing related to this topic. I created a box for the adapter boeard that attached to the hose hook.

I have published it n makerworld and if interest you can find it here with the original FreeCAD file: Box

PXL_20251025_202742343
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PXL_20251025_202725238
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PXL_20251025_202735186
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3 Likes
13

I connected the red power line to my laser tree to the mosfet driven power output, I’m running on 24v, then yellow line to gpio.27, then black wire to board ground with the power supply.
Don’t forget to uncomment the laser section of your config.yaml. Paste this into your config:

user_outputs:
analog0_pin: NO_PIN
analog1_pin: NO_PIN
analog2_pin: NO_PIN
analog3_pin: NO_PIN
analog0_hz: 5000
analog1_hz: 5000
analog2_hz: 5000
analog3_hz: 5000
digital0_pin: gpio.26
digital1_pin: NO_PIN
digital2_pin: NO_PIN
digital3_pin: NO_PIN

Laser:
pwm_hz: 5000
output_pin: gpio.27
enable_pin: NO_PIN
disable_with_s0: false
s0_with_disable: true
tool_num: 0
speed_map: 0=0.000% 1000=100.000%
off_on_alarm: true

Then make sure you configure Lightburn to use 1000 as max speed, (it usually is already, but make sure) in laser tools → machine or device I can’t remember which