Search found 44 matches

by lbarger
Thu Aug 11, 2016 8:24 am
Forum: Troubleshooting
Topic: Dimensions problem
Replies: 3
Views: 643

Re: Dimensions problem

With OD's being too large and ID's being too small, it sounds like you could be over extruding. (A problem I just learned that I had.) First, determine if the e-steps on the extruder are correct. I removed the boden tube and positioned the filament where it extended a few mm out the bottom of the ex...
by lbarger
Thu Feb 04, 2016 9:48 am
Forum: Troubleshooting
Topic: Dead Rostock Max V2
Replies: 4
Views: 714

Re: Dead Rostock Max V2

Thanks for the help. Had exactly the same issue. Did not immediately realize that tiny thing was a fuse. Ordered 10 spares as they are cheap compared to next day shipping. I blame the blown fuse on the ring light I added in parallel with the heat sink fan. The light became loose, apparently twisted ...
by lbarger
Sun Jun 07, 2015 2:39 pm
Forum: Filament
Topic: PETG (PET)
Replies: 13
Views: 3866

Re: PETG (PET)

"Oozing" from the nozzle would be accurate for PET+ as well which results in the stringy prints I mentioned. The parts I have been printing are a custom pivoting mount for a 7" touch screen so there are large internal spaces with reinforcing ribs that makes the slicer want to jump fro...
by lbarger
Sun Jun 07, 2015 11:34 am
Forum: Rostock MAX v2
Topic: JERK !!!
Replies: 11
Views: 2600

Re: JERK !!!

So, this text from the firmware source code: Caution: This is no real jerk in a physical meaning. The jerk determines your start speed and the maximum speed at the join of two segments. Its unit is mm/s. If the printer is standing still, the start speed is jerk/2. At the join of two segments, the s...
by lbarger
Sun Jun 07, 2015 11:31 am
Forum: Filament
Topic: PETG (PET)
Replies: 13
Views: 3866

Re: PETG (PET)

I have not tried PETG, but have been using PET+ to print front panels for a laboratory instrument I've made. Love the strength and resistance to warping during print, but find it to be rather stringy and a bit pricy. I've been wondering about the differences between PET+ and PETG. I see that it has ...
by lbarger
Sun Jun 07, 2015 11:23 am
Forum: Filament
Topic: Graphene filament for printable batteries!
Replies: 7
Views: 1474

Re: Graphene filament for printable batteries!

This concept seems suspect to me. Batteries typically take two different materials with a different electron-volt potential. The electrolyte allows the electrons to flow between the materials of differing potential producing voltage/current. Unless there is something special about those white 'space...
by lbarger
Fri Jun 05, 2015 8:57 am
Forum: Rostock MAX v2
Topic: JERK !!!
Replies: 11
Views: 2600

Re: JERK !!!

Acceleration is the rate that the feedrate is increased in mm per second per second. Jerk is the speed to which the feedrate will immediately jump to without applying any acceleration. Keep in mind that this also applies for slowing the nozzle down. So for example with a setting of Jerk: 35 and Acc...
by lbarger
Wed Jan 14, 2015 9:19 am
Forum: Rostock MAX v2
Topic: What to Name It?
Replies: 10
Views: 1385

Re: What to Name It?

My wife wants me to call the printer China so that my parts are "made in China". :) I've settled on ELF (extruding layer fabricator) as it works through the night and gives me completed parts the next morning.
by lbarger
Mon Nov 24, 2014 8:45 am
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

I also think it may be useful to calculate the surface normal of the bed. There is some code in Smoothie that does this, and I'm looking at it to see how it's done. I don't think tilt in towers can be tested for well as that should look like changing horizontal radii or tower angles as the Z level ...
by lbarger
Fri Nov 21, 2014 8:59 am
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

626Pilot, Sounds like your math is much more sophisticated than my own. More like where I would like to get to. My question is what are the variables we would likely need to be able to adjust? As I said in my last post, I think there is something (or several things) going on with your system that my...
by lbarger
Thu Nov 20, 2014 10:37 pm
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

Would you like to share the spreadsheet? I think it would be extremely helpful to a lot of us! I will be more than happy to share it once I'm sure it works. Releasing a tool that does not work correctly and does not have any meaningful instructions will only add to the frustrations of those struggl...
by lbarger
Thu Nov 20, 2014 9:10 pm
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

626Pilot, I have not yet been able to replicate the measurements you provided. What's particularly difficult to emulate are both the extreme dip at the -Y position and the funky sine wave like oscillation along the line going from Z to -Z. I'll keep trying. I'm seeing if I can add other tests to the...
by lbarger
Wed Nov 19, 2014 10:18 am
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

Now, here is some hard data: [PD] [Z] [PD] 0.000 [PD] -1.125 -.--- -0.258 [PD] -.--- -.--- [PD] -.--- [PD] -.--- -.--- [PD] [X] 0.019 -.--- 0.009 [Y] [PD] -0.066 The criteria for endstops and delta radius (less than 30 microns of variance between X, Y, and Z) are all met. Yet, X's opposite is -0.25...
by lbarger
Tue Nov 18, 2014 10:36 pm
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

I've read the whole thread pretty thoroughly now, but I'm not seeing a set of enhancements or calibration steps that will result in a decent setup. I can see that using something on the arms to tension them is very helpful as well as making sure that everything is tight as far as screws, belts, etc...
by lbarger
Tue Nov 18, 2014 10:14 pm
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

I created an Excel spread sheet with both inverse and forward kinematics. Given the values in the firmware for arm length, horizontal radius, radial position of towers and the positions of my printed columns, I determined the skate positions for each tower. I then had additional variables for the a...
by lbarger
Sun Nov 16, 2014 8:57 pm
Forum: Troubleshooting
Topic: Odd Thicknesses on Brim on Large Part
Replies: 6
Views: 1094

Re: Odd Thicknesses on Brim on Large Part

Just FYI the carbon fiber arms themselves dont offer much, if any, advantage. It is simply the manner in which try are fastened to the carriages and effector that improves performance. The same can be achieved by adding tension to the arms to prevent lateral play. I am agree with you on that. I got...
by lbarger
Sun Nov 16, 2014 8:51 pm
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

I think you are all overthinking this. I can print large prints across the entire surface of the bed with even the smallest little circles sticking perfectly. If be adhesion is te only issue, then it's a simple fix. Granted if you are looking for a perfectly even base layer, you might need a new ho...
by lbarger
Sun Nov 16, 2014 3:03 pm
Forum: Troubleshooting
Topic: Odd Thicknesses on Brim on Large Part
Replies: 6
Views: 1094

Re: Odd Thicknesses on Brim on Large Part

Replaced stock arms with carbon fiber version to eliminate play in end effector. Major improvement. Currently have full bed variation in height of just 0.16mm and about to reduce that with minor (~0.02mm) adjustments to end stops and 0.1mm change to horizontal radius. Problem was play in the end eff...
by lbarger
Sun Nov 16, 2014 2:57 pm
Forum: Troubleshooting
Topic: HELP! Trying to Level Bed, Y Tower Driving Me Crazy!
Replies: 1
Views: 701

Re: HELP! Trying to Level Bed, Y Tower Driving Me Crazy!

Recap - A minor displacement in X and Y near the base of the Y tower would cause the print head to raise/lower nearly .5mm. Makes it impossible to calibrate properly. I kept going back to the play I was seeing in my end effector. Initially, it did not appear seem to be a big issue as it did take 'a ...
by lbarger
Sun Nov 16, 2014 2:38 pm
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

Yeah. Did you read the post I made just before yours? The cable ties eliminate all play in the u joints. The rest is strictly a radius and end stop adjustment. You seem to have achieved adequate results, what further improvements are you seeking? I tried rubber bands on the stock arms which helped,...
by lbarger
Sun Nov 16, 2014 11:17 am
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

I have been struggling for weeks to get rid of high spots at the perimeter midway between all three towers. End stops and radius only got me so far. Did not have any clear signal suggesting it was tower rotation as all points were similarly high. I did notice a fair amount of play on the end effecto...
by lbarger
Wed Nov 05, 2014 1:30 pm
Forum: Troubleshooting
Topic: HELP! Trying to Level Bed, Y Tower Driving Me Crazy!
Replies: 1
Views: 701

HELP! Trying to Level Bed, Y Tower Driving Me Crazy!

I have now spent a couple of weeks trying to dial in my RMax V2 bed leveling in order to print large objects I need for my business. I've gone through the procedure in the manual and a few others methods found on line. The obvious problem is the end effector rising at points opposite the three tower...
by lbarger
Tue Nov 04, 2014 12:10 am
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

Getting a little closer... I found a screw on my z skate that I failed to tighten during the build. It was on the Y tower side of the Z tower and at the top of the skate near the arm's u-joint. Getting the hidden screw tight was the start of getting consistent (but not yet perfect) results. Before t...
by lbarger
Tue Oct 28, 2014 8:47 am
Forum: Troubleshooting
Topic: Unsolved Mystery. Weird Z0 behavior around build perimeter.
Replies: 500
Views: 73353

Re: Unsolved Mystery. Weird Z0 behavior around build perimet

My RoMax V2 also seems incapable of to printing much outside the triangle defined by the towers. I started a thread about the unusual variations in the brim of a part I tried the print here... http://forum.seemecnc.com/viewtopic.php?f=37&t=6680" onclick="window.open(this.href);return false; I fo...
by lbarger
Sun Oct 26, 2014 9:55 pm
Forum: Troubleshooting
Topic: Odd Thicknesses on Brim on Large Part
Replies: 6
Views: 1094

Re: Odd Thicknesses on Brim on Large Part

I designed a 'quick' calibration triangle that has 7 1.95mm tall, 5mm diameter, posts in the following locations. 1) Centered (0,0) {1.88mm} 2) Base of X Tower (-112.6, -65.0) {1.96mm} 3) Base of Y Tower (112.6, -65.0) {2.01mm} 4) Base of Z Tower (0,130.0) {1.97mm} 5) Midway between X & Y Tower ...

Go to advanced search