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People building or using RepRaps.
Re: Random Extrusion Failure - 11 years ago
SniporBob: I am afraid that I might not be able to help but did want to confirm that you have never extruded PLA from the troubled nozzle? I mixed PLA and ABS and think that resulted in a clog to beat all clogs. Couple of other questions, have you tried white ABS? My understanding is that black is the most troublesome of ABS (not sure about Orange), maybe white would be more friendly. Lastlyby Wisar - Printing
Re: What blows up Pololus on RAMPS - 11 years ago
I was wondering about power from the PSU. Slowing things down a touch seems to have helped. Have been running without a slip for a bit now (knock on wood). Another two slips! One on the z-axis, which I have never seen before, and one on the x-axis. After the z-axis slip I added a big old honking cooling fan for the electronics thinking that it may help and can not hurt. Unfortunately tby Wisar - RAMPS Electronics
Re: Retraction distance? - 11 years ago
Retraction to 1.5 at 190 does seem to work pretty well for ooziness. I am also using the wipe option in Slic3r. Not completely gone but better. My best results with bridges and overhangs (with PLA) has been cooling, cooling, cooling. Wisarby Wisar - Mendel90
Re: Retraction distance? - 11 years ago
Do you add and extra length on restart at that higher level?by Wisar - Mendel90
Re: What blows up Pololus on RAMPS - 11 years ago
I will endeavor to be more careful re static. I got a new stepper yesterday and after carefully plugging it in and doing an initial test everything was hunky dory. It was running at .4v as measured between ground and the trimpot. My other steppers are all at .5v but I thought I would start lower as opposed to higher. So I print some calibration objects and everything is still hunky dory.by Wisar - RAMPS Electronics
Re: Don't know what to do next.... - 11 years ago
I assume you have double checked the wiring for the z-axis? Is there any sound or vibration on the z-axis servos? If so, you may need to adjust the trim pot on the stepper driver. Search for that as a topic as there seem to be different techniques. Be careful rotating that trim pot as it is delicate. You might also try switching the stepper from an axis that is working to the z-axis. Youby Wisar - Reprappers
Re: What blows up Pololus on RAMPS - 11 years ago
My printer also seems to be eating Pololus's though not dramatically with sound effects and smoke. They just seem to die gradually. The symptoms will be that the axis they control will start to act in an irratic fashion (e.g. skipping for example). I will adjust the trim pot and things will work for a bit longer. Ultimately no amount of adjusting will cause the thing to come back to life.by Wisar - RAMPS Electronics
Re: Extruder Servo Runs Under Test but Not with Printrun - 11 years ago
No output at all. If I try to extrude below the temp threshold I do get yelled at but when above it everything is happy...just no extrusion. It was working! and it prints fine! Wisarby Wisar - Reprappers
Re: Extruder Servo Runs Under Test but Not with Printrun - 11 years ago
More on the above. Can now print just fine...but still can't get the extruder to extrude on command from Printrun...I can live without this capability but wonder why it does not work? Wisarby Wisar - Reprappers
Extruder Servo Runs Under Test but Not with Printrun - 11 years ago
My printer was working fine...but now the extruder servo will not run under control of Printrun, either manually or when trying to do a print. Yet when I run the RAMPStestcode sketch everything works like a charm. I did a print earlier tonight and nothing has changed in either the firmware or hardware yet this behaviour persists. I am baffled how something could work under the test script buby Wisar - Reprappers
Re: New Hot End - Returning Bogus Temperature - 11 years ago
More on this situation. For grins and giggles decided to plug Ramps board into a spare Arduino Mega. Proper temps now being returned all around. Am wondering if a pin got fried on the Arduino? Wisarby Wisar - Reprappers
New Hot End - Returning Bogus Temperature - 11 years ago
I just installed a new hot end (J-Head MK-V) on my Prusa I3, made no other changes, and Pronterface is telling me that the temp on the hotend is 200 when it is cold! I measured the resistance of the thermistor and get 106K which is the same as what the old one got. When I turn on the hotend this resistance falls. And finally, when I connect the old thermistor...same bogus reading being retby Wisar - Reprappers
Re: Calibration required for each spool of filament? - 11 years ago
It appears the problem was user error / mechanical adjustment. Tension not high enough on the filament. Thanks for the advice, Wisarby Wisar - Reprappers
Calibration required for each spool of filament? - 11 years ago
Is it a common practice to need a recalibration of the steps per unit for the extruder on every change of a filament roll? Are suppliers at least consistent? I am new to this game and just went to a second roll of PLA and am finding that it must be smaller (or less dense?) than my first roll given the way it is printing with the same setup. I bought a digital caliper but did not have it forby Wisar - Reprappers
Re: Shifting on Axis - 11 years ago
Blush. Looking for the obvious payed off. It also helped to ask myself the question...did anything change between when it was working and when it was not? I had 'improved' my setup to try and keep the power and thermistor leads from the hot bed out of the way of things. This entailed an elastic 'spring' that must have been putting just enough force on the table to cause my issue. Gettinby Wisar - Reprappers
Re: Help! Print layers don't line up... - 11 years ago
Maybe some lubrication on your bearings? Also, unless you are doing this on purpose to save filament, you need to up your Axis Steps per Unit for the extruder to get a more solid print. Wisarby Wisar - Reprappers
Re: Getting PLA to stick to bed - 11 years ago
I get great results printing PLA on a glass bed heated to 60 and treated with ABS goop. I don't know why it works so well but it does. In fact my biggest problem with ABS is adhesion to the bed but not with PLA! Wisarby Wisar - Reprappers
Re: Shifting on Axis - 11 years ago
I really thought we had the answer when one of the two set screws was quite loose and the other not as tight as the two on the x-axis. But alas, three or four layers in, and we started to drift again. Always to the positive direction... Wisarby Wisar - Reprappers
Re: Shifting on Axis - 11 years ago
Connections look good (store bought and then wiring soldered) and I can not see the belt slipping though I am not sure exactly how to check! It looks and feels like the same tension as always has been. Thanks for the tips...... Wisarby Wisar - Reprappers
Shifting on Axis - 11 years ago
My new Prusa I3 had been working pretty well. Was still a little calibration to be done but I was able to print some spare bits and also some larger pieces. Suddenly I am having it shift on the y-axis (in the positive direction) to the point where I can't print! Belt tension seems ok, I have worked on the trim pot's, and think they are tuned ok, but I am still suffering. What is the mostby Wisar - Reprappers
Re: BRIDGE FEEDRATE MULTIPLIER equiv for Slic3r? - 11 years ago
Thanks, I see the appropriate option and will give it a try once I replace a blown extruder thermistor :-(by Wisar - Reprappers
BRIDGE FEEDRATE MULTIPLIER equiv for Slic3r? - 11 years ago
I am working my way through calibrating my printer and now need to work on overhangs. The tuning guide suggests tweeking the BRIDGE FEEDRATE MULTIPLIER parameter and I can not find anything that comes close to matching that terminology in Slic3r which is what I am using (along with Pronterface to drive Marlin). Obviously, any overhang printing advice would be appreciated! Thanks for any guidby Wisar - Reprappers