I am working on a z-axis mod/design, but haven’t built my Maslow frame or installed Ground Control yet (waiting to move into a new house with a garage!), is it possible to power/run the z-axis motor on it’s own so that I can do some testing?
In case of interest, I am making slow progress - currently waiting for a cable to arrive to be able to test the motor - the idea is to be able to re-use a Bosch POF 500 router base/stand which has a 43mm router clamp, because this is the same as a Kress or similar router which can give low rpms. I am also hoping it will give options to make a much lighter weight sled in preparation for faster travel speeds in the future. Changing bits should also be very easy as the router comes in and out with just a hand knob to clamp it.
I tapped the top of one of the ‘slide posts’ for a bolt with which to mount a plate to hold the motor. The motor then turns the threaded rod via the coupler, which moves the threaded nut up and down the rod - pushing the router down in one direction, and allowing the springs to push it up in the other. The threaded rod is kept in place (to pull against) with a ‘c clip’ underneath the base.
Hopefully a video next week showing it in action, and being able to test how accurate the Z-travel is, whether there is too much friction or binding etc.
Good reminder, thanks - I guess two bricks is around 5-7kg so much more variation there than changing for a lighter router.
I have some 20t sprockets on order and so was guessing that double the speed would like to be around half the weight. With the mechanics page giving an ideal weight of 18lbs, I was aiming for 10lbs, which I think is less than the weight of the Ridgid 22002 on it’s own. A kress is about 4lbs, leaving me plenty of room for the sled with a UHMW base, z-axis, ring, vacuum hose etc. My current worry is how much is enough weight to push the bit into the material. Of course the other driver for low rpms is the relative silence.
On the other hand, if the max force on the motors is at top-middle, then raising the top bar higher above the workpiece would probably be an easier way to avoid any motor strength limits - even before the new driver board and more powerful motors etc.