[weekend_warrior]

I'm new to this game and attempting to build my first mill. Granite, it's not a tormach, but I believe the Little Machine Shop 3990 benchtop mill will work fine to start with and learn. Anyways I've also ordered a spindle control board from the little machine shop, which they recommended to me to be able to control the speed of the spindle within Mach3. I've managed to wade through the Chinglish of the manual for the BOB and got it installed and operating within Mach3. I even got the control board installed and March3 can start/stop the spindle. The problem is, for the life of my I can't figure out how to get it to control the speed. All I can get it to do is turn it on (full Speed) and off within mach3. Below is the URLs for the products I purchased, pictures of the diagrams I could find. Can someone please help me with this, lol. I dont believe this addon controller has a tach built into it, but the head stock does and I plan on wiring it later if possible.. But even without the Tach I should be able to somehow manually manipulate the speed via mach3 until then?


LMS 3990
https://littlemachineshop.com/3990


LMS 4213 Spindle Controller (Replaces the manual potentiometer in the head unit)
https://littlemachineshop.com/4213
Wiring Diagram/Instructions (PDF) http://littlemachineshop.com/instruc...UpgradeKit.pdf


XHC-MK3 3-Axis USB Break Out Board
High-Torque Stepper Motor, Stepper Motor, Driver, Stepper Motor kit, DC Servo Motor, DC Servo Motor kit, Stepper Motor Power Supply, CNC Router, Spindle, and other Components. Stepper Motor | Stepper Motor Driver | CNC Router | Laser Machine | 3D Prin


Wiring Schematic for VFD (PDF) http://www.automationtechnologiesinc...ng-diagram.pdf
Instructions on the product page state that there are three mode for spindle control on this BOB, VFD, PWM, and Pulse + Direction

Any help would be greatly appeciated. As for my Mach3 Settings I have them set per the MK3 instructions listed above within the VFD instructions

Thank you in advance.

[weekend_warrior]

Well After many hours of staring at wiring schematics and Chinglish I've managed to get basic LMS 3990 spindle control using the above mentioned parts by adding a Digispeed dc-03 V3 controller and a couple 5V relays. I can now control on/off and speed. But it's obviously not calculating the correct speed cuase when I select a speed of 400rpm it's actually turning about 280RPM. I'm now looking to interface the 3990's tach to Mach3 so I can utilize the spindle calibration wizard. Anyone attempted this yet and suceeded?

[daniellyall]

well you did not need any of those extra board you can do it all with a G540

[GENX]

well you did not need any of those extra board you can do it all with a G540

Do you mind posting how or a link? I want to control my spindle with the Gecko.