The SLB-EXT 5xHAL is a next-generation 32-bit controller for use with the AltMil, and is open source for other CNCs brands using closed-loop stepper motors.
This controller is not compatible with CNCs using Open-Loop Stepper Motors. Read FAQs for more details.
Our SLB-EXT features:
Faster movement and jogging speeds
Quieter motors
CNC status lights with support for external lighting
Safe E-stop depowers motors and disables accessories
Programmable action buttons to suit your workflow
Faster probing and higher sensitivity with touch plates
Higher level spindle control using RS485**
Smoother and faster laser motion and engraving
Independent 4th axis rotary output for simultaneous 4-axis cutting
USB-C and Ethernet connectivity to computer with extensive shielding and onboard ferrites to improve communication reliability
*Huanyang v1 and P2A, and H-100 currently tested to work out-of-the-box. More to be added in the future.
The SLB-EXT is an advanced, next-generation, plug-and-play, CNC controller for all generations of the AltMill CNC. The SLB-EXT allows your AltMill to run faster and more reliably. The SLB-EXT is a significant upgrade in functionality and performance.
Each order comes with:
An SLB-EXT in a robust aluminum enclosure
Independent E-stop with 3 customizable action buttons
2.5m E-stop cable
1m USB-C to USB-A cable
Mounting brackets for AltMill and custom applications
The only other things you’ll need to purchase are:
Components such as connectors, wires and motors to modify or make your own CNC
FAQs
Q: Will the SLB-EXT-EXT work with my CNC?
A: If it’s a LongMill with closed-loop steppers or an AltMill then definitely it will. Otherwise, your CNC should be supported so long as it’s a typical hobby CNC setup with closed-loop Nema 23s.
We’ve earnestly done our best to ensure the SLB-EXT would be ideal for any typical setup since the inspiration for the SLB-EXT came from trying to take things that are normally only available on more expensive and ‘closed’ boards and bring them into the open source domain and at a more affordable price for the benefit of as many hobbyists as we could. This means that although you will need to change certain settings to match your specific setup, the SLB-EXT will support a range of machines and accessories including 5/24V limit switches, touch plates, tool length sensors, laser diodes, external 4th axis, and more.
Q: How can I know if the SLB-EXT is right for me?
A: There are many other offerings on the market that come with a wide range of features, simply put the choice between these will always come down to budget. If you don’t think you need the features offered by the SLB-EXT then it’d make more sense to spend less money. In this case consider getting a more typical grbl board or some of the newer x32 hobby CNC boards that might require more DIY setup time for wiring or programming. For instance the Blackbox x32 has the benefit of a direct wireless connection but less extensibility. If instead you feel like you want to pull all the stops to support a higher-end CNC or use more advanced features then you might want to increase your budget and look into a Centroid, UCCNC, or Mach setup. We believe though that we’ve done our best to match the SLB-EXT up with the mid-level hobby CNC community where it makes sense to spend $150-200 on a controller to really unlock all the capabilities you’d be looking to expect out of your $1000-4000 CNC.
Q: Is the SLB-EXT open source?
A: Yes, the SLB-EXT, firmware, and related software like gSender will be released open source. This may come at a later date when we feel that our designs are finalized and should be available soon on our Resources pages. Note, the SLB-EXT shares much of the same functionality as the SLB, information here is relevant fo the SLB-EXT.
Q: Will the SLB-EXT support accessories like the Vortex Rotary Axis, AutoZero touch plate, or LaserBeam?
Yes, the SLB-EXT will support all of our existing accessories for the LongMill and AltMill as well as opening up additional improvements and functionality to accessories, such as improved laser motion control, fully independent 4th axis control, and improved speed and sensitivity on touch probes and plates.
Q: Will the SLB-EXT support tool changers?
A: The SLB-EXT does come with the hardware to support the IO for a tool changer, such as relay control and tool length sensor inputs.
Warranty
The SLB-EXT comes with a 90-day warranty starting at the time of arrival to the customer against manufacturing defects. Those 90 days are also covered for use of the board as long as it uses:
A correctly-spec’d and high-quality power supply like our 48V 10A
Tested and approved firmware developed by Sienci Labs without modification to the source code
Please note that power supplies with the incorrect output voltage and/or current may damage the board. We also strongly recommend using default or recommended settings for the SLB-EXT. Damage caused by incorrect settings may not be covered by warranty or assessed on a case-by-case basis.
This video also provides some insight on everything you need to know about setting up your SLB-EXT. Functions and features are the same between the SLB and the SLB-EXT.
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