# Reverse Engineering the Module Wiring **URL:** \ **Category:** Original (3-in-1)\ **Created:** [July 2, 2018, 2:55am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031 "2018-07-02T02:55:53Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![CthulhuLabs](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/cthulhulabs/32/1254_2.png) [@CthulhuLabs](https://forum.snapmaker.com/u/CthulhuLabs)\ **Post date:** [July 2, 2018, 2:55am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/1 "2018-07-02T02:55:54Z")
So I am in the process or reverse engineering some of the SnapMaker components so I can use a different controller with them. As I figure out how things are wired I am going to edit this post with that info. **3D Printing Module:** PIN1: VCC, Heater Socket Pin 1, Fan+ PIN2: Stepper Coil A+ PIN3: Heater Socket Pin 2 PIN4: Stepper Coil A- PIN5: Thermistor Socket Pin 1 PIN6: Stepper Coil B- PIN7: GND, Fan-, Thermistor Socket Pin 2 PIN8: Stepper Coil B+ **Heated Build Plate:** PIN1: Heating Element + PIN2: UNUSED PIN3: Heating Element - PIN4: UNUSED PIN5: Thermistor + PIN6: Thermistor - The heating element registered as 12Ohms so 48W at 24V. The Thermistor gave a reading of 80kOhm in my 90 degree F garage. **Linear Module:** PIN1: Coil A + PIN2: Coil A - PIN3: Coil B + PIN4: Limit Switch + PIN5: Coil B - PIN6: Limit Switch - Please note I am not positive on the coil polarity. ---
**Author:** ![CthulhuLabs](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/cthulhulabs/32/1254_2.png) [@CthulhuLabs](https://forum.snapmaker.com/u/CthulhuLabs)\ **Post date:** [July 8, 2018, 2:55am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/4 "2018-07-08T02:55:57Z")
Added the info for the heated bed and the linear modules. ---
**Author:** ![SimonSpencer](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/simonspencer/32/2494_2.png) [@SimonSpencer](https://forum.snapmaker.com/u/SimonSpencer)\ **Post date:** [September 19, 2018, 4:44am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/5 "2018-09-19T04:44:02Z")
As I don’t have a Snapmaker yet, I’m not entirely clear - is the RJ45 cabling on the Linear Modules embedded, or detatchable? If they were the latter, a broken cable would mean you just replace that, not the whole component. ---
**Author:** ![epoe](https://avatars.discourse-cdn.com/v4/letter/e/7ab992/32.png) [@epoe](https://forum.snapmaker.com/u/epoe)\ **Post date:** [September 19, 2018, 6:17am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/6 "2018-09-19T06:17:47Z")
@SimonSpencer : [https://store.snapmaker.com/product/rj45-cable](https://store.snapmaker.com/product/rj45-cable) ---
**Author:** ![Workalot](https://avatars.discourse-cdn.com/v4/letter/w/a5b964/32.png) [@Workalot](https://forum.snapmaker.com/u/Workalot)\ **Post date:** [November 1, 2019, 7:44am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/7 "2019-11-01T07:44:22Z")
Hello CthulhuLabs, Thank you on sharing these pinouts. I can confirm that a nominal 81K is measurable between pins 7 and 5 of the RJ45 jack. And the absence of a sensible value, ie open circuit/short circuit between pins 7 & 5 would have the snapmaker controller halt proceedings. On an other where recent post I sought information on having snapmaker act as a solder dispenser. Your information is of assistance. I soldered a 82K 1608 SMT resistor between pins 7 & 5 on a free RJ45 jack. This allowed my fitted dispenser to run a dry solder paste. If you don’t mind I would suggest pin 1’s Vcc label be renamed to +24V. Vcc conventionally denotes a +5Vdc level. regards, Workalot ---
**Author:** ![enlightenonq](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/enlightenonq/32/3118_2.png) [@enlightenonq](https://forum.snapmaker.com/u/enlightenonq)\ **Post date:** [July 13, 2020, 1:08am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/8 "2020-07-13T01:08:29Z")
Did a full Tear Down and Compared to actual servo motor wiring. This is from the wiring method used on the extruder motor and also how the servo’s are wired. I built TL Smoother’s and the Diodes need to be on the + side which is 2 & 3 For the Linear Module: Slight Modification. PIN1: Coil B- PIN2: Coil B+ PIN3: Coil A+ PIN4: Limit Switch (no polarity needed) PIN5: Coil A- PIN6: Limit Switch (no polarity needed) ---
**Author:** ![Dre64](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.snapmaker.com/dre64/32/1978_2.png) [@Dre64](https://forum.snapmaker.com/u/Dre64)\ **Post date:** [August 24, 2021, 6:43pm UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/9 "2021-08-24T18:43:05Z")
**The laser module** (200mW and 1600mW) pin 1: +24V pin 3: (inverse) Enable, PWM input pin 5: 130 Ohm resistor to GND as module identification pin 7: GND pin 2,4,6,8: N.C. I found on internet this [schematic](https://content.instructables.com/ORIG/FC5/ZFF4/KOVH5BVA/FC5ZFF4KOVH5BVA.pdf). The driver uses a [XLSEMI XL3005E1](http://www.xlsemi.com/datasheet/XL3005%20datasheet-English.pdf) laser driver IC. Snapmaker uses almost the same circuit as proposed in the datasheet. Measuring the PWM signal on pin 3: ![measure_pwm](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/b/b89a06ba15e634f73a3eb1614d6a6193de44d2b1.jpeg) PWM signal to pin 3, laser at 5%: ![20%pwm](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/e/e9060aec9063c8e1e9b628fcf6405644c886db97.jpeg) PWM signal to pin 3, laser at 60% ![60%pwm](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/6/60545431642f40a7497d5a7a70e6b5b00ebfbfaa.jpeg) Signal levels: 0V to ~4V (laser on = 0V), t=1,6ms → 625 Hz Connecting the laser module to a power supply and pin 3 to 0V on the work bench will also run the laser: ![bench top](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/2X/9/9fd4dcd9ffbe835c304187c38e8858cad4a25322.jpeg) 200mW module input current at 24V: 134 mA = 3,2 W, efficiency: 0,2/3,216=0,06, 6% 1600mW module input current at 24V: 460 mA = 11W, efficiency: 1,6/11=0,1455, 15% ---
**Author:** ![LH4PI](https://avatars.discourse-cdn.com/v4/letter/l/8e7dd6/32.png) [@LH4PI](https://forum.snapmaker.com/u/LH4PI)\ **Post date:** [July 19, 2022, 8:53am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/10 "2022-07-19T08:53:33Z")
Hi I also want to use the SM1 for other purpose and make a XY table to extend my 69W fiberlaser galvo system , I already have a controller that a pulse and direction outputs for two stepper units . What controller do you want to use . Best Regards Lars ---
**Author:** ![valtroth](https://avatars.discourse-cdn.com/v4/letter/v/ee59a6/32.png) [@valtroth](https://forum.snapmaker.com/u/valtroth)\ **Post date:** [December 15, 2022, 5:13pm UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/11 "2022-12-15T17:13:41Z")
Great information! I am going to modify my 200mW laser module. Want to build a handheld laser welding tool to weld plastic parts together. ---
**Author:** ![LH4PI](https://avatars.discourse-cdn.com/v4/letter/l/8e7dd6/32.png) [@LH4PI](https://forum.snapmaker.com/u/LH4PI)\ **Post date:** [February 14, 2023, 5:57am UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/12 "2023-02-14T05:57:44Z")
Hi CthulhuLabs Did you succeed to adapt another controller (A Uno preferable running GRBL 1.1f) to control the linear module . If not GRBL controller may I ask what controller did you use All best Lars ---
**Author:** ![dikkedimi](https://avatars.discourse-cdn.com/v4/letter/d/71e660/32.png) [@dikkedimi](https://forum.snapmaker.com/u/dikkedimi)\ **Post date:** [March 22, 2023, 10:24pm UTC](https://forum.snapmaker.com/t/reverse-engineering-the-module-wiring/3031/13 "2023-03-22T22:24:34Z")
Here’s what I came up with, got the linear module working this way with an Uno and a CNC shield. Too bad the shield only had 3 axes, which made it unsuitable for snapmaker. Will try some day with my bigtreetech to see how fare we get 🙂 ![snapmaker wiring](https://us1.discourse-cdn.com/flex022/uploads/snapmaker/original/3X/f/a/fa6fb98e28c07cddbcbf31dc8d50b4da83844ad0.png)