the 3d printed molds that have been made before were made of the polyjet material, not FDM, this is a big difference. unless you are doing some kind of liquid silicon molding in that unit, an FDM printed mold will probably not last in an injection molding machine. I will spare the details in full, but on the injection molding side, with the clamping pressures(1 ton per square inch), injection pby cakeslob - General
Its pretty standard practice to dry the plastic before it goes into the machine. That is to say the machine will not be run if the material is not dry. My materials drying chart recommends ABS for 2-4 hours @ 190f/ or 87 degrees Celsius in a desiccant type dryer. this still depends on material grade. Your resin should have come with a material data sheet. it will state dryer time/temp on it aswby cakeslob - Plastic Extruder Working Group
Its not going to work very well. thats why the latest revisions are not hbot. i was building the hbot folda2 on my own as he posted the files and all the different versions. . the plastic corner brackets make it flimsy and the y axis sliders do not have near enough rigity and to much flex. also over constrained so they just flex . Bearing wise? I had the same problem. 8mm rods and bearings flexeby cakeslob - CoreXY Machines
I take it as more of a lesson than anything else. I dont know what anyone else expected, especially after occupy thingiverse. its kinda funny though. industry patents 3d printing, patents run out, we take the info from the old patents and open source it small industry replicates it for profit small industry patents it. what ever, I am just going to use the ideas from makerbots patents anywby cakeslob - General
Theres Carbon fiber reinforced polymer and theres Carbon (fiber) They add carbon to plastic all the time at my work they use it for TPO parts for the auto industry edit wow is that markfor3d filiment really $550 per lb?by cakeslob - General
Quoteiquizzle The problem isn't necessarily binding (although it could be if it was reeeeaallly bad). The problem is that the force balance in the h-bot configuration results in torque on the gantry. Here is an image I made a few months ago to describe it. This mainly manifests itself in small angle rotation of the linear rods permitted by the clearance of the bearings. The resulting distortioby cakeslob - FoldaRap
QuoteEmmanuel (or for an H you'll need an expensive frame to make it work). which is what I opted to do. I took out the corner brackets and made more rigid metal brackets. I took the belting out of the tslot channels for less drag, I eventually had to take out the aluminium extrusion pla style bearing and get real bearing and by then it was hardly a foldarap2. I really want to belt in frame toby cakeslob - FoldaRap
I followed the Foldarap2 from the beginning of the project till the last Hbot revision where he went over to the rack and pinion. At the point I started doing my own fork of the foldarap2 hbot. I could never get them to work the greatest. Too much drag, binding, and deflection to make the hbot work properly. I really liked the corner brackets and the belt inside the channels of the Tslots but theby cakeslob - FoldaRap
Quotewoodencase01 I personally use www.fastenal.com They have a wide choice of hardware at a very low price. Ditto that for canada. got a majority of my stuff there. I just pick it up at the local warehouse 5k from my house Sayal also has a lot of good stuff.hardware included. I also live in an industrial steel making city so Ive been just going to local places to get things. Hard ware in smalby cakeslob - General
Trying to find a closed loop stepper system , one that is with in my budget no less, has been a daunting task. I found a driver for $80-$140 on alibaba from china but other than that they have all been $4xx-$1xxx. My point being, I would buy them. Kit or otherwise. edit, Im not worried about the motors running faster, I want them to run colderby cakeslob - General
I made a watercooled attachment with thermistor for about my hotend, but have yet to test. There was an interesting seller on ebay that had good documentation on water cooled hotends (albeit, ones that he was selling) . But the more I read and work with injection molding, the more watercooling I am integrating into my 3d printer. Why are you using antifreeze ? Just wondering. I hope your prby cakeslob - General
Ive been printing out the xy axis this weekend, for a tslot project Im doing. I like it so far, light and rigid enoughby cakeslob - General