I'm building a 3-axis CNC router with PMDX-424 and tandem X axis motors. I had a single motor, prior to the tandem x-xis upgrade. In anticipation of gantry squaring in the PMDX-424 plug-in, I've wired my X-axis motors to "Motor 3a & 3b". I assume the gantry squaring process would work better with something passing across the face of a sensor vs. approaching it. I originally used Micro-switches that are positioned poorly for this.
I'm considering re-doing the x-axis with 4 proximity sensors - probably the PMDX-PROX-01. To make this work, I'd need to attach a plate to each side of the gantry. The plate will be positioned to pass in front of the face of each sensor - at or near the end of X-axis travel.
I'm hoping that the gantry squaring software will use an initial setup process where offset parameters, for each end of the gantry, can be measured an input as constants. It would be difficult and tedious to adjust the sensor/plates so that they simultaneously trip - only when the gantry is square.
Will the use of proximity sensors, such as the PMDX-PROX-01, provide the repeatability necessary to square the gantry?
I'm also hoping you can comment on the availability of Gantry Squaring.
Thanks.