Our Closed-Loop Stepper Motor Kit is designed for existing LongMill lovers and DIY CNCers looking for the benefits of a feedback loop system that auto-corrects motor missteps and deviations from commands. ***This is not available for exchange if you have already purchased a LongMill. It is an entirely new product and must be purchased separately.*** For Vortex Rotary Axis closed loop motor upgrade, please purchase it here. Switching to closed-loop stepper motors from open loop NEMA 23 motors on your LongMill means more reliability. The main difference between the systems is that open-loop motors lack positional feedback making them prone to “skipping steps” under load. With closed-loop motors, the feedback system helps monitor motor position which enables self-correction, improved accuracy and operational efficiency. The addition of the SLB-EXT Closed-Loop Controller sets up “dual homing” which allows your CNC to square the X and Y axis to one another through limit switches. This kit is compatible with MK2 and MK2.5 versions of the LongMill, any size. It is not compatible with LongMill MK1. The kit can be used with non-Sienci Labs CNCs, but we will not offer support. This product has a lead time. Please click here to see our current lead times. ***Our products are subject to the USMCA and are not affected by the 35% tariff on Canadian goods at this time. Read our blog post on how we are handling the situation. We will be shipping to US customers with UPS option only.***
