Don't know what kind of machine you use, but some machines have the solution built in.
On mine, the homing speed is user selectable, both high and low speed.
The head moves toward the home limit switches at the high speed, say 2000pps, all three axis moving at the same time.
As the limit switch on each axis is "made", the axis in question reverses at the low speed of 100pps until the micro switch just opens and the axis stops moving. This becomes the machine reference point.
The repeatable accuracy is determined by the type of switch used.
The driver box I use is by Ah-ha. Unfortunately, I don't think they are "active" in any meaningful way. They have moved to an undisclosed closet, their website hasn't been updated in months, but someone will come out of the woodwork and swear new boards are available. Support is non-existent. Except for the company being dead in the water, it is a good stepper system. |