Cheap Rotary attachment
I saw this on a CNC forum. Looks like it can be modified and used in the K40 fairly easily. $90 USD
http://www.ebay.com/itm/191714031261?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
http://www.ebay.com/itm/191714031261?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
I have no idea how this thing work, and I cannot imagine using it as a rotary attachment for the k40.
ReplyDeleteAny more information on how to use it ?
It is used as a drive for a roller attachment like this one
ReplyDeletehttp://www.thingiverse.com/thing:299018
The gear reduction may be problematic if you aren't running software that allows you to set the drive ratios. That drive is aimed at milling machine users to turn a rotary table. Mach 3 (and virtually all other CNC setups) allows you to set the steps/inch (or mm), so the gear reduction is easily accomodated and provides improved precision.
ReplyDeleteA stepper motor (200 step/rev. I'm pretty sure) and drum with idler wheels is all you really need, just do the math based on the steps /rev and belt drive to determine the drum dia to match the travel of the Y axis in the K40 and then you can just plug into the Y output on the board when you want to roll engrave.
20 bucks and some inginuity out to do it.
If you are going to be building stuff to attach to this to use as a rotary, you could probably do the same from scratch for similar or cheaper price & not have to compromise your design to "fit" this part. One of the users here (Allready Gone) posted some images of his rotary attachment setup in the past & although they are unable to be found, I believe Stephane added them to the PDF file that is stickied at the top of the group main page.
ReplyDeleteYeap... i think so also. If You already have a laser cutter, build one Your self.
ReplyDeletecheck what steper You have for Y axis and find something like it. Do some math to find out well size to match travel distance of Y axis...
Cut parts and put them together...
This is how i would do. Of course You can get one from China. But that is no fun :)