Show all posts by user

Re: Whats the latest and greatest Delta platform these days? - 11 years ago

Well, I will probably add FSR to the 3DR Simple. I've got one (too early) failed attempt at it already. Not really sure about my goals. I want another printer to keep at home since my others have migrated to the office. I want something fast and quiet, like the 3DR Simple. I was leaning towards a "regular" RichRap 3DR plus the FSR leveling. But that fancy new Cherry Pi looks interesting as well

by brendanjerwin - Delta Machines

Whats the latest and greatest Delta platform these days? - 11 years ago

I built a 3DR Simple about 6 months ago and its still going strong, but I think its time to build another. Whats the latest cool designs these days? (I have the bad habit of falling out of the community after each big project...) I'm really interested in something that incorporates the FSR-style auto bed tramming/leveling approach. Any suggestions?

by brendanjerwin - Delta Machines

Re: Fixed, non-mechanical probe idea: Inductive Proximity Sensors - 12 years ago

I'll not be using a heated bed, so that won't be too much of a consideration for me. Thanks for the feedback guys!

by brendanjerwin - Delta Machines

Re: 3DR "Simple" Delta Printer - 12 years ago

JohnSL, I'd like to second that request for .STEP files. I'd love to make some tweaks, but SolidWorks is a bit out of reach...

by brendanjerwin - Delta Machines

Fixed, non-mechanical probe idea: Inductive Proximity Sensors - 12 years ago

Here's an idea for a z-probe that I think might be pretty cool. I ordered a few of these (LJ12A3-4-Z/BX Inductive Proximity Sensor Switch NPN DC6-36V). My plan is to try and mount it in a fixed manner right next to the hot-end. I think it will wire in just like a hall-effect end-stop. I'll need to abandon the glass print bed, but I hear DiBond makes for a pretty good surface as well. If this

by brendanjerwin - Delta Machines

3DR Variant Without ground rods and bearings - 12 years ago

I thought I'd heard of a 3DR variant that used the extrusions for linear motion. Does that ring a bell for anyone? Can you point me to it?

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Yep, I think so. I've never installed precompiled binaries from printrbot though. I used dfu-programmer to send the firmware to the board.

by brendanjerwin - Delta Machines

Re: CuraEngine slicing and Octoprint - 12 years ago

Is this in master now for Octoprint? I noticed the patch was merged into Cura, are there current instructions anywhere? (or a pre-baked image...)

by brendanjerwin - Developers

Re: Building a 3DR "Simple" - 12 years ago

In other news: I've added active cooling to my extruder stepper, since it is under a good bit of load all the time: A heatsink and fan are epoxied on with heatsink epoxy and a 40C N.O bimetal switch is wired in and epoxied on. When the stepper gets to 40C, the fan kicks on and cools it down.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Hmmm. It turns out the totally warped and deformed platform was _not_ the cause of the strange skewing. After I got it all back together with the new platform, and got it re-calibrated, I tried the 50mm tower again. It had the same skewing... I've decided to start adjusting the top of the z-tower again. I've adjusted it to ~18mm, as apposed to the other tower's ~20mm. Those adjustments produce

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Much better now! Also, it turns out the as-designed numbers for the measurements are dead on! I'm doing the last bit of calibration now to make sure my rods are right at 200mm as well. Edit: They are.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Finally got the replacement printed in ABS with no curling... Sheesh, PLA is so much easier to work with! EDIT: Well, it actually warped a little even with the ears... It's not much at all, so I'll give it a go anyway.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

I'm pretty sure I found the problem! I decided to examine the bot a lot more closely after re-re-re-measuring the tower heights and found this: That looks a bit warped, huh? Took it apart and this is the platform: So, I'm going to print another one in ABS at a fairly high infill density and try that. I did a couple of test prints without the fan, so maybe that caused it? In either case,

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Here is an example of the problem:

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

I've ordered a set of the machined spools in the hopes that what I'm seeing is due to errors in my printed spools. Looking here, and specifically at: Makes me think that, if the problem is errors in my spools, I should see a difference in the affect by printing the object closer to the edge of my print area. I'll test that tonight.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

After adjusting the Z-Tower top to be the same height as the other two, the skew problem has gotten better, but not eliminated. Now what I'm seeing is a slight amount of skew, still towards the Z-Tower, only happening about 8mm up the print from the bottom. After about 8mm, the skew stops and things seem pretty normal. It seems that in the area of the skew, in the direction of the skew, things

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Another thing. I slowed down my homing speed even more. Now its 70*60. I think it might be knocking the end-stops too hard and messing with the height calibration.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Thanks JohnSL. My calibration was heading toward that number (I was .5 off). I'll try again with exactly that number since I'm pretty confident in the quality of my parts. I see that my z tower top frame is 3mm higher (in relation to the aluminum extrusion) than the other 2 towers. I suspect that is the source of my skew. I'll fix that and try the exact numbers from the CAD files tomorrow.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Now that is just weird. I printed a 50mm tall tower. The first ~14mm of it skewed toward my Z tower but the rest of it printed pretty well true. I wonder if that might actually be something with the spool on that axis.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

E steps / mm were way off. Seeing as I just stole some values from a random repository of AirTripper's I wasn't surprised. Measured and set them more correctly at 97/mm. That'll do well enough to keep calibrating. Now I'm printing a 20X20 test shape pretty well. It's measuring out to be right around 20mm on both sides (20.1X20.5). But, it seems skewed in one direction. The print is not exactl

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

OK, first print happened! Decided I needed to wire up the fan, but it didn't work. After some research I found that I needed to set the fan pin to 16 instead of 22. That fixed it.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Good news! By carefully reading the blog here I was able to get the heights at all 4 points pretty damn close. Thanks jaydmdigital for that. I was adjusting in the wrong direction, that's why things made so little sense.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Hmmm. I just re-read that blog post on configuration and I think I've been going the wrong direction with my adjustment of smooth rod offset... Lemme try again.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Yes, it puts it right in front of the tower. The issue I was having while following that (or a very similar) routine, was that when I got the end to 0.1 above the bed at the towers (using M666), it would crash into the center of the bed... As I adjusted smooth rod offset up to compensate, it wouldn't make enough of a difference.

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Alright, I'm at a bit of a lose here. I'm trying to get the delta radius set but things just aren't making sense. With these settings (I know, horrible things done to the smooth rod offset): // Center-to-center distance of the holes in the diagonal push rods. #define DELTA_DIAGONAL_ROD 200.0 // mm | 200 mm as built // Horizontal offset from middle of printer to smooth rod center. #define DEL

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Hmmm. Mine is Z X Y clockwise. Probably wrong, huh?

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

Got the dimensions with the e-drawing app: Punched in those numbers and now I'm going through the M666 dance...

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

So i went back and re-read the post on configuring firmware for the first edition of the 3DR Simple and I'm pretty sure the dimensions have changed on this rendition. So, that means that, although I can get it to move at all, it's not moving correctly. I'll have to wait or find a way to get the right measurements... Anybody out there able to help with that? jaydmdigital, I've added a couple of

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

I got it moving! Here is my firmware for folks that are interested: My Fork Also, here is a video of it working: Video Post The motion isn't quite right yet. I took the measurements from JohnSL's original post on configuring firmware but I suspect things are not quite the same with the latest design... JohnSL, is that true?

by brendanjerwin - Delta Machines

Re: Building a 3DR "Simple" - 12 years ago

A quick update: I received the ground rods and extrusions finally! The main structure of the printer is in place now: I've also got one of the steppers installed. It was a _tight_ fit fishing those wires through the extrusion, but once its done it sure is neat and tidy. One thing to note: the steppers on the Printrbot Simple v2 all have nice long wires. They will only need a little bit o

by brendanjerwin - Delta Machines