I am designing an H-BOT Drawbot and the time has come to send a part to my local fablab to print on a replicator.
The part is in pink in the pictures, and it will hold the LM8UU bearings with zip ties and the idler pulleys, which are a stacked pair of flanged F623 bearings, with 3mm screws.
Do you have any tips for printing a part like this? Is there any major flaw that I am not seeing?
@Mark_Rehorst there also a twin plate on top not shown in the pictures that will hold the top set of bearings with zip ties. The plates will be held together via screws in the center bearings and four more pairs on the sides. I believe this will hold the bearings, do you still advise a redesign?
I know zip ties are fine, but if you are going to sandwich two plates together to make one plate then why not do away with zip ties altogether?
I designed mine to use only one plate. But your seems to look fine. Go ahead and print. If there is enough clearance for. The belt you won’t have issues
@Ariel_Yahni_UniKpty I dig your design! Do you think it is stiff enough to mill and drill PCBs?
It will depend on how heavy it’s the center of gravity. I’m not going to push this design to more that it is, was meant for a laser. I migth use it with a pencil but need to get a servo as I don’t want to add more weight.
If you gap the bars enough, you might be able to put a hole in the middle for a dremel bit or some small motor with a chuck on it. I do not know how you plan on mounting the tool with this design.
Oh wait…is this for a moving bed design?
@NathanielStenzel yep, the effector will be mounted at one end of the rods.
Update: someone else had the same idea 
http://hackaday.com/2016/04/23/home-made-pen-plotter/
@Davide_Candiloro oh. That? Hahaha…that thing has had someone else interested lately too.
That’s @Miguel_Sanchez . BTW its awesome. Love the inverted steppers.why didn’t I think of that.