# Snapmaker RFID Not Registering When Re-Loaded **URL:** \ **Category:** U1 Toolchanger\ **Created:** [July 12, 2026, 1:02pm UTC](https://forum.snapmaker.com/t/snapmaker-rfid-not-registering-when-re-loaded/42491 "2026-07-12T13:02:59Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![CrazyIvan](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@CrazyIvan](https://forum.snapmaker.com/u/CrazyIvan)\ **Post date:** [July 12, 2026, 1:02pm UTC](https://forum.snapmaker.com/t/snapmaker-rfid-not-registering-when-re-loaded/42491/1 "2026-07-12T13:02:59Z")
So readers know: all I’ve done so far is set up my U1 and run off multiple dragon test prints. I’m getting “toolhead swapping anomaly” messages at the end of most prints, usually a multiple count on toolhead 2 and none (or few) on the other toolheads. I decided to confirm my suspicions about this being a defect of that particular physical toolhead by swapping them around, so I unloaded the filament on heads 2 and 4, physically switched heads 2 and 4, and tried to re-load the filament. The first time out, filament loading worked like a charm. Loading the Snapmaker filaments resulted in the colour and type being correctly assigned to each toolhead (by RFID, I presume). But now, I can’t get them to register at all. I realise I can set them up manually, but right now I am exploring this printer and I want to understand why it isn’t working. To start with, I did not physically remove the reels from the holders, but in case it had not observed a change of reel I took the reel away and then brought it back. I’ve even tried swapping the reels around, and power-cycling the U1. What’s the trick? Other factors which _might_ have a bearing: when originally loaded, the U1 was on its original firmware 0.9.3. It has since been updated to 1.5.1, then 1.4.1, then Paxx 1.4.1 (in case that matters). ---
**Author:** ![ColdCoffee](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@ColdCoffee](https://forum.snapmaker.com/u/ColdCoffee)\ **Post date:** [July 12, 2026, 1:38pm UTC](https://forum.snapmaker.com/t/snapmaker-rfid-not-registering-when-re-loaded/42491/2 "2026-07-12T13:38:41Z")
I’m not near my Mac at the moment but I remember having to change a setting in PAXX to use openspool rfid, but can’t remember what it’s called without being able to look ---
**Author:** ![CrazyIvan](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@CrazyIvan](https://forum.snapmaker.com/u/CrazyIvan)\ **Post date:** [July 12, 2026, 1:41pm UTC](https://forum.snapmaker.com/t/snapmaker-rfid-not-registering-when-re-loaded/42491/3 "2026-07-12T13:41:30Z")
But this isn’t Openspool, this is the original Snapmaker RFID. Does that have to be specifically enabled in Paxx? That might be the answer… ---
**Author:** ![ColdCoffee](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@ColdCoffee](https://forum.snapmaker.com/u/ColdCoffee)\ **Post date:** [July 12, 2026, 1:43pm UTC](https://forum.snapmaker.com/t/snapmaker-rfid-not-registering-when-re-loaded/42491/4 "2026-07-12T13:43:47Z")
I can’t remember if that’s the default or not (snapmaker) worth just having alook what it’s set to though? ---
**Author:** ![CrazyIvan](https://avatars.discourse-cdn.com/v4/letter/c/7bcc69/32.png) [@CrazyIvan](https://forum.snapmaker.com/u/CrazyIvan)\ **Post date:** [July 12, 2026, 2:39pm UTC](https://forum.snapmaker.com/t/snapmaker-rfid-not-registering-when-re-loaded/42491/5 "2026-07-12T14:39:15Z")
Yes, that got it. The Paxx settings defaulted the RFID to “External”, changed that to “Snapmaker” and RFID is working again. Thanks for the nudge. ---
**Author:** ![ColdCoffee](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@ColdCoffee](https://forum.snapmaker.com/u/ColdCoffee)\ **Post date:** [July 12, 2026, 2:40pm UTC](https://forum.snapmaker.com/t/snapmaker-rfid-not-registering-when-re-loaded/42491/6 "2026-07-12T14:40:57Z")
Nice one, glad its sorted