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I thought I would share this here as I have found it through solid professor, a new cad tool called Onshape, it is fully cloud based and is free, it is in beta right now and improving by the day, I like it because it runs in a browser, (not internet explorer) you do not need any software on you machine, it's fully functional for parts and assemblies works like direct modelling. It will run on an
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Paul4865
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3D Design tools
If you are a mechanical engineer, don't buy a kit, design and build your own, you will find a lot of different options here on the forum, my advice would be do the research first, all the mistakes have been made by the guys building the repraps, all you need to know and want to know is here.
For a first printer go Cartesian, XYZ, they are easy to set up and get going, as far as accuracy goes, you
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Paul4865
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General
Shadowphile,
I have tried 3mm PLA through a Bowden setup using a Gregs geared extruder with my own homemade 8mm hobbed bolt, I found the pressure required was enormouse and had issues with the drive grinding the filament, I have since designed an extruder with twin hobbed bolts which did not slip but used to build so much pressure in the Bowden every now and then the motor would recoil backwards,
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Paul4865
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Delta Machines
What is the correct font for the text?
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Paul4865
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Reprappers
I would not use olive oil, you will cause all sorts of other issues, strip your hot end clean it out, make sure you get all the oil residue out, rebuild it dry, back off the grip on the filament your probably deforming it and making it hard to enter the round hole, also check the alignment of the hot end to the extruder, you can fit these a bit skewed, never put any lubrication on the filament es
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Paul4865
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Printing
No never heard of it, I am going to set up some motion simulations in Solidworks, basic line following of the end effector along a path sketch, just to see that all the mates stay good and nothing gets close to an interference.
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Paul4865
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Reprappers
Thanks for the advice, I had them a little bit long based on the 80% rule, going to chew it for a few more days and do some simulations before I cut the carbon tubes.
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Paul4865
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Reprappers
Now designing my own delta, has become sort of a right of passage into the rep-rap community, I am fighting with my self to make a decision for length of the end effector rod versus build area. The question (at last) is there a sweet spot equation for best operation for build area and the length of the link rod to the end effector, we all know deltas are at there most inaccurate with the rods mos
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Paul4865
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Reprappers
Most of the people here build there own printer, your survey assumes we have bought an off the shelf job
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Paul4865
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General
You may have put the pins in the plugs the wrong way round, it's easy to do, they have a little raised hook that retains them. Pull them out give them a little tweak they should hold the pin.
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Paul4865
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Reprappers
These fitting are mostly used on pneumatics, for the most part they are pipe threads but you can get them with metric threads but they are usually metric fine.
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Paul4865
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Reprappers
Looks very tidy, nice job. My only comment would be; you have constrained the end of the lead screw, this is OK if your threaded rod is dead strait but it never is, this is a problem as it will cause Z wobble, I had mine running on 12mm rod with the lead constrained in bearing as you have and even with 12 mm smooth rods I got a wobble on taller prints, I changed the design and let them do what th
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Paul4865
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Developers
I will try checking that and see what it does, thanks
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Paul4865
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Printing
No it printed on its own
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Paul4865
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Printing
I have printed 4 columns for my MKII printer I am currently building, I have noticed slight defects on each one in nearly an identical pattern, it looks like a mechanical jump except it goes away the further up the print it goes, it's printed @ .2mm layer with a .35mm nozzle, sliced with slic3r in repetier host and run from a SD card, in black ABS, it cannot be defects in the material as the patt
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Paul4865
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Printing
Thanks for your help, I have tried all the usual tricks, I had to uninstall and clear out all created folders and then reinstall, it did fail the first time to find the composition g code but it found it at the second attempt, all seems to be fine now. I'm off to melt some ABS.
Thanks again, you guys alway come through.
Regards Paul.
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Paul4865
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Repetier
when I use slic3r within the Repetier host, I get the message attached, can anyone give me a solution to this.
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Paul4865
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Repetier
I had this issue,
I had the Y Axis going the wrong way, when I set it up I had the bed moving in the direction of the arrows in the host, it should be the extruder moves relative to the bed,
You can have 0'0 where you like, I find having the bed out font is easier, I cover mine during warm up to speed things up a bit, it's easy to flip it with a true or false statement in the firmware, it usuall
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Paul4865
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Reprappers
Spot on, it was the Y axis, I am used to my CNC where the tool moves not the bed, I set it up with bed travel not head travel, the thing is I have been using it for a couple of weeks and it only came to light when I tried to print text.
thanks mate all sorted.
Regards.
Paul
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Paul4865
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Printing
I am hoping there is a simple fix and it's a setting somewhere, I am using Repetier host and the preview of the part shows correct on the bed but parts print back to front is it possible I have the x and y axis both the wrong way round?
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Paul4865
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Printing