# SLB-EXT ant the ATC **URL:** \ **Category:** 🛠️ Assembly\ **Created:** [September 29, 2025, 5:20pm UTC](https://forum.sienci.com/t/slb-ext-ant-the-atc/22098 "2025-09-29T17:20:44Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Tony3](https://forum.sienci.com/letter_avatar_proxy/v4/letter/t/b9bd4f/32.png) [@Tony3](https://forum.sienci.com/u/Tony3)\ **Post date:** [September 29, 2025, 5:20pm UTC](https://forum.sienci.com/t/slb-ext-ant-the-atc/22098/1 "2025-09-29T17:20:44Z")
Has anyone install a Rapid Change ATC with the SLB EXT on the 48X48 Altmill? I downloaded the setting from the ATC to a SD card and installed it in my SLB EXT . I don’t think Gsender is readig the card on the SLB. I contacted Sienci and I was told that At this time SD cards are not supported by the SLB or SLB-EXT I find that hard to believe. Is there a Gsender command to check the SD card. Thank You All Regards Tony ---
**Author:** ![Spamming\_Eddie](https://forum.sienci.com/user_avatar/forum.sienci.com/spamming_eddie/32/7296_2.png) [@Spamming\_Eddie](https://forum.sienci.com/u/Spamming_Eddie)\ **Post date:** [September 29, 2025, 5:28pm UTC](https://forum.sienci.com/t/slb-ext-ant-the-atc/22098/2 "2025-09-29T17:28:41Z")
Hi Tony, Not sure what is not to believe when sienci says something isnt supported yet. It’s their software. There was a topic on development on the edge side of things going into atc and sd card stuff that you might find i teresting to read. > [@gSender Dev Log - Main and Edge](https://forum.sienci.com/t/gsender-dev-log-main-and-edge/21946): > > Just here to give an update on what’s going on with Dev/Main with respect to fixes and new features - not a release thread, just keeping people in the know on what we’re working on. Also, some of this is very cool so I’m excited to share it with you all ahead of time slight_smile1.6.0 Edge Cycle Our next Edge cycle is going to be focused on supporting a more modern version of grblHAL, SD card support, ATC support, and some long standing fixes to rotary and time estimation. We haven’t had a… I believe there to be a unofficial release of gsender or edge with sd card support, but I am not looking i to that myself for I am happy with what I ha e in gsender 1.2.2. Maybe a search in the topic finder can bring that up for you. Like this: > [@SD card support](https://forum.sienci.com/t/sd-card-support/13697): > > Kevin/Chris How far down the road is SD card support on the super long board for grbl and or grblhal? ---
**Author:** ![drilling-vagueness](https://forum.sienci.com/letter_avatar_proxy/v4/letter/d/258eb7/32.png) [@drilling-vagueness](https://forum.sienci.com/u/drilling-vagueness)\ **Post date:** [October 2, 2025, 3:04pm UTC](https://forum.sienci.com/t/slb-ext-ant-the-atc/22098/3 "2025-10-02T15:04:07Z")
I believe grblHAL is built with SD support for the SLB (and I assume SLB-ext); this sort of thing is more up to grblHAL than Sienci assuming the basic hardware support has been validated. If you check the grblHAL docs you should be able to figure out how to determine if it can read and execute files from the SD. The following commands should be roughly correct but I haven’t validated them ```auto # check that the SD plugin was compiled into your firmware build $I [MSG:Plugins: Core, Probing, SD Card, Spindle] # check SD active $36 # list files M20 ``` This is on my (long) list of things to do, I can have a look this weekend when I get home if you don’t get it figured out by then. Dv ---
**Author:** ![JohnOCFII](https://forum.sienci.com/user_avatar/forum.sienci.com/johnocfii/32/4808_2.png) [@JohnOCFII](https://forum.sienci.com/u/JohnOCFII)\ **Post date:** [November 5, 2025, 8:47pm UTC](https://forum.sienci.com/t/slb-ext-ant-the-atc/22098/4 "2025-11-05T20:47:22Z")
Message @siganberg - based on his many Youtube videos, he’s got an AltMill and is using the Rapid Change ATC with the SLB EXT.