# How to setup the holding current?

**URL:** <https://forum.sienci.com/t/how-to-setup-the-holding-current/11474>\
**Category:** 🌀 Rotary Axis\
**Created:** [March 3, 2024, 11:17pm UTC](https://forum.sienci.com/t/how-to-setup-the-holding-current/11474 "2024-03-03T23:17:07Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![memphismachinist](https://forum.sienci.com/letter_avatar_proxy/v4/letter/m/a88e57/32.png) [@memphismachinist](https://forum.sienci.com/u/memphismachinist)\
**Post date:** [March 3, 2024, 11:17pm UTC](https://forum.sienci.com/t/how-to-setup-the-holding-current/11474/1 "2024-03-03T23:17:08Z")

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Hello all, new gSender user here. Formerly a Mach3 guy. I have a Onfinity X-35 Woodworker which the OEM controller died. I opted to go with an Openbuilds Blackbox x-32. Moved from the OB Control to gSender, mainly because of the built in rotary axis support. The Vortex unit comes with a box with a toggle switch. Can someone explain this to me? I have the components to build a rotary on hand, so no need to buy one. My real question is if I unplug an axis to use as the rotary, how would I apply current to that axis to keep it from moving? Is there documentation on this?

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**Author:** ![StephenCampbell](https://forum.sienci.com/user_avatar/forum.sienci.com/stephencampbell/32/6018_2.png) [@StephenCampbell](https://forum.sienci.com/u/StephenCampbell)\
**Post date:** [March 4, 2024, 3:53pm UTC](https://forum.sienci.com/t/how-to-setup-the-holding-current/11474/2 "2024-03-04T15:53:16Z")

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Hey @memphismachinist,

Great question! **Simply navigate to your Firmware tab and ensure that you have $1 set for 255. This will keep the A-axis stiff and prevent you from bumping it out of alignment.**

 ![Holding current](https://forum.sienci.com/uploads/default/original/2X/e/e747a528b5b377491286ac08909b0651b4278eac.jpeg)

To read more info on what the Vortex toggle switch does, you can check out the [Rotary Mode section here!](https://resources.sienci.com/view/vx-first-project/#rotary-mode)

Cheers,  
Stephen

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**Author:** ![StephenCampbell](https://forum.sienci.com/user_avatar/forum.sienci.com/stephencampbell/32/6018_2.png) [@StephenCampbell](https://forum.sienci.com/u/StephenCampbell)\
**Post date:** [March 4, 2024, 5:33pm UTC](https://forum.sienci.com/t/how-to-setup-the-holding-current/11474/3 "2024-03-04T17:33:21Z")

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To add to that, we don’t have the ability to hold current on more than 3 axis on the Longboard, but the new and upcoming SuperLongboard will have the ability to hold 4 axis individually!

You will also need to calculate your A-axis Travel resolution somehow.

 ![image](https://forum.sienci.com/uploads/default/original/2X/a/a2ff4ef0ec95ff2f722456e2b9c6a1d88b73c0f1.png)

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<div class="post-metadata">

**Author:** ![memphismachinist](https://forum.sienci.com/letter_avatar_proxy/v4/letter/m/a88e57/32.png) [@memphismachinist](https://forum.sienci.com/u/memphismachinist)\
**Post date:** [March 4, 2024, 8:41pm UTC](https://forum.sienci.com/t/how-to-setup-the-holding-current/11474/4 "2024-03-04T20:41:24Z")

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Is the x axis available to use as the rotary, or just the Y? I could always swap plugs, as the two axis are the same length, so that should not be an issue. I guess, to prevent movement of the axis, i can make any number of add-ons to do that. I manually indexed this as a test. It was tedious, but worked fantastic.

 ![OnefinityIndexSetup_Oct04_2023](https://forum.sienci.com/uploads/default/original/2X/3/34241fc55f3ba154c0ce47fa46f13da972244179.jpeg)  
 ![20231007_205238](https://forum.sienci.com/uploads/default/original/2X/7/7631b92ed795fdf305bff05dd2c69b28fceb58e5.jpeg)