# Connecting a VFD inverter and spindle to an LongMill MK2 **URL:** \ **Category:** 🧰 CNC Setup\ **Created:** [March 24, 2023, 6:24pm UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404 "2023-03-24T18:24:58Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![VinceC](https://forum.sienci.com/letter_avatar_proxy/v4/letter/v/bcef8e/32.png) [@VinceC](https://forum.sienci.com/u/VinceC)\ **Post date:** [March 24, 2023, 6:24pm UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/1 "2023-03-24T18:24:59Z")
Has anyone tried to connect a-spindle and vfd inverter to a longmill MK2 successfully?? ---
**Author:** ![\_Michael](https://forum.sienci.com/user_avatar/forum.sienci.com/_michael/32/2962_2.png) [@\_Michael](https://forum.sienci.com/u/_Michael)\ **Post date:** [March 24, 2023, 9:13pm UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/2 "2023-03-24T21:13:54Z")
Check [this](https://forum.sienci.com/t/adding-a-spindle-to-your-longmill/6330) out! It might get you pointed in the right direction. ---
**Author:** ![gwilki](https://forum.sienci.com/user_avatar/forum.sienci.com/gwilki/32/366_2.png) [@gwilki](https://forum.sienci.com/u/gwilki)\ **Post date:** [March 24, 2023, 9:31pm UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/3 "2023-03-24T21:31:47Z")
@VinceC In addition to the link that @_Michael provided, search the forum for “spindle”. ---
**Author:** ![fafesb](https://forum.sienci.com/letter_avatar_proxy/v4/letter/f/6bbea6/32.png) [@fafesb](https://forum.sienci.com/u/fafesb)\ **Post date:** [March 25, 2023, 2:27pm UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/4 "2023-03-25T14:27:51Z")
Vince, go to the Add-ons & Modifications section and I put a total instructions on anding the spindle/vfd to the Longmill. It works great! ---
**Author:** ![gwilki](https://forum.sienci.com/user_avatar/forum.sienci.com/gwilki/32/366_2.png) [@gwilki](https://forum.sienci.com/u/gwilki)\ **Post date:** [March 28, 2023, 3:00pm UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/5 "2023-03-28T15:00:25Z")
@VinceC As I believe that your question has been answered, Vince, I am closing the thread. If, after reading the posts that @_Michael and I referred to, you still have questions, please do not hesitate to start a new thread with specific questions. ---
**Author:** ![RussSomdahl](https://forum.sienci.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@RussSomdahl](https://forum.sienci.com/u/RussSomdahl)\ **Post date:** [August 27, 2025, 10:27am UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/8 "2025-08-27T10:27:28Z")
> Trying to add my VFD H100-1.5C2-B1 and 110v 400HZ spindle to SLB (G-Sender (1.5.3) Can’t find Your full instructions, can you add a link please ---
**Author:** ![fafesb](https://forum.sienci.com/letter_avatar_proxy/v4/letter/f/6bbea6/32.png) [@fafesb](https://forum.sienci.com/u/fafesb)\ **Post date:** [August 27, 2025, 11:21am UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/9 "2025-08-27T11:21:21Z")
Russ here is a link to adding the spindle to SLB. The write up I did was for the old Longboard. This is what I used for my Altmill. I also added the H100 setting that Sienci uses for the VFD setting. [1.5KW 110V Sienci VFD Full Settings.pdf](https://forum.sienci.com/uploads/short-url/mSrxzYJo8MEBd7DKAA4pBaJ81Ca.pdf) (272.7 KB) > **[Technical Manual - SuperLongBoard](https://resources.sienci.com/view/slb-manual/#spindlers485)** > > Documentation for the SuperLongBoard, a next-generation, 32-bit control board for the LongMill and other CNC routers. Includes electrical and mechanical specs. ---
**Author:** ![RussSomdahl](https://forum.sienci.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@RussSomdahl](https://forum.sienci.com/u/RussSomdahl)\ **Post date:** [August 27, 2025, 12:43pm UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/10 "2025-08-27T12:43:56Z")
Thank you very much. All’s well. Had my RS485 address set to 0 on VFD (now 2) and black/red wiring switched. 🤩 ---
**Author:** ![gwilki](https://forum.sienci.com/user_avatar/forum.sienci.com/gwilki/32/366_2.png) [@gwilki](https://forum.sienci.com/u/gwilki)\ **Post date:** [August 27, 2025, 2:41pm UTC](https://forum.sienci.com/t/connecting-a-vfd-inverter-and-spindle-to-an-longmill-mk2/8404/11 "2025-08-27T14:41:36Z")