Uploaded June 2026 | Updated September 2026, 2 weeks ago
Our Tool Length Sensor is a workshop time saver. Jon, our mechanical engineer behind the design, walks you through the installation for the AltMill, LongMill and 3rd party CNCs.
Detailed instructions here resources.sienci.com/view/addons-tls
Order now:
sienci.com/product/tool-length-sensor-kit
It requires gSender 1.6.2 or higher to operate.
github.com/Sienci-Labs/gsender/releases
Chapters
00:00 Quick Intro
00:18 Unboxing
01:16 TLS Components
02:14 AltMill 4x8 Installation
04:12 AltMill 4x4 MK1 Installation
05:12 LongMill MK3 Intallation
05:40 gSender Configuration
06:56 Spindle Position
07:33 First Tool Behaviour
08:04 Tool Change Position
09:04 Spindle Setup
09:38 G-code Editor
10:10 First Toolpath
12:00 Bit Change & Second Toolpath
12:58 Outro
Compatibility:
- Any size or version of the AltMill
- Any size LongMill MK1-2.5 (requires limit switch upgrades)
- Any size LongMill MK3
- Other CNC brands with proper controller support: (a) They must be able to supply a 5-24V to a TLS and can operate with a normally closed (NC) TLS input; b) Major brands with controllers that support a TLS include Onefinity, Shapeoko, Genmitsu, Carbide 3D and many more; c) The TLS is designed for flat wasteboard surface mounting
----------------------------
What's a Tool Length Sensor (TLS)?
A TLS is a probe, fixed to your CNC machine, used to measure the length of your cutting tool. It will greatly enhance your workflow, as it maintains your z-axis zero position across multiple tool changes. It measures the relative offset of your tool length, whether you're using different tools or changing the stickout of your tool in the collet. It's essential for businesses or hobbyists looking for more consistent, precise and reliable cutting jobs, and it greatly speeds up setup time.
----------------------------
Subscribe to Sienci Labs
youtube.com/@SienciLabs
Download FREE CNC interface software
sienci.com/gsender
Join our Facebook Community group
facebook.com/groups/mill.one
Read our Company Blog for Production & Product Updates
sienci.com/blog
Check your Order Status
sienci.com/order-status
#longmill #siencilabs #cncmachine #cncwoodworking #cncmachining #cncrouter #cncsetup #cncsoftware #software #hobbycnc #beginnerfriendly
Our Tool Length Sensor is a workshop time saver. Jon, our mechanical engineer behind the design, walks you through the installation for the AltMill, LongMill and 3rd party CNCs.
Detailed instructions here resources.sienci.com/view/addons-tls
Order now:
sienci.com/product/tool-length-sensor-kit
It requires gSender 1.6.2 or higher to operate.
github.com/Sienci-Labs/gsender/releases
Chapters
00:00 Quick Intro
00:18 Unboxing
01:16 TLS Components
02:14 AltMill 4x8 Installation
04:12 AltMill 4x4 MK1 Installation
05:12 LongMill MK3 Intallation
05:40 gSender Configuration
06:56 Spindle Position
07:33 First Tool Behaviour
08:04 Tool Change Position
09:04 Spindle Setup
09:38 G-code Editor
10:10 First Toolpath
12:00 Bit Change & Second Toolpath
12:58 Outro
Compatibility:
- Any size or version of the AltMill
- Any size LongMill MK1-2.5 (requires limit switch upgrades)
- Any size LongMill MK3
- Other CNC brands with proper controller support: (a) They must be able to supply a 5-24V to a TLS and can operate with a normally closed (NC) TLS input; b) Major brands with controllers that support a TLS include Onefinity, Shapeoko, Genmitsu, Carbide 3D and many more; c) The TLS is designed for flat wasteboard surface mounting
----------------------------
What's a Tool Length Sensor (TLS)?
A TLS is a probe, fixed to your CNC machine, used to measure the length of your cutting tool. It will greatly enhance your workflow, as it maintains your z-axis zero position across multiple tool changes. It measures the relative offset of your tool length, whether you're using different tools or changing the stickout of your tool in the collet. It's essential for businesses or hobbyists looking for more consistent, precise and reliable cutting jobs, and it greatly speeds up setup time.
----------------------------
Subscribe to Sienci Labs
youtube.com/@SienciLabs
Download FREE CNC interface software
sienci.com/gsender
Join our Facebook Community group
facebook.com/groups/mill.one
Read our Company Blog for Production & Product Updates
sienci.com/blog
Check your Order Status
sienci.com/order-status
#longmill #siencilabs #cncmachine #cncwoodworking #cncmachining #cncrouter #cncsetup #cncsoftware #software #hobbycnc #beginnerfriendly
