Show all posts by user
Prusa i2, Prusa i1, Prism, Sells, and other Mendel variants
retract causes filament to slip out - 12 years ago
Here is what I mean. After a long retract, the filament is pulled out so much that it slips out of the hotend, but is still gripped by the extruder. The extruder then chews up the filament because it gets stuck in the space between the extruder and hotend. Slic3r is set to only retract 1mm (default) but it think it retracts more than that. Any suggestions?by peqo - Printing
Re: Motors don't have smooth movement - 13 years ago
a_shorething Wrote: ------------------------------------------------------- > Hey peqo, > > I think I may have a solution for you. Did you > build the pololu driver boards yourself? > > If so (and I guess even if you bought them from > someone else) you may find that the problem is in > the soldering. > > The fact that it's worse when it's slower is key > becby peqo - General Mendel Topics
Re: Motors don't have smooth movement - 13 years ago
nophead Wrote: ------------------------------------------------------- > Do the chips get too hot to touch? The most likely > explanation is current is too high and the chips > go into thermal shutdown. Check that the sense > resistors on the Pololu are 0.05R, i.e. labelled > 005, Not 0R links as some clones have. They aren't too hot. However, the only labeled resistors are eitheby peqo - General Mendel Topics
Motors don't have smooth movement - 13 years ago
I have a prusa with theese motors and a sanguinololu 1.3a. I have the belt disconnected for testing. The motors stop moving smoothly (see video) at seemingly random times, however the slower the motors run, the more likely it is to happen (usually within ~2 seconds or ~3 rotations). I have tried: different motors Sprinter and Teacup firware removing everything but 1 pololu and 1 motor differenby peqo - General Mendel Topics
Re: changing steps_per_unit affects speed - 13 years ago
Yeah, it does, but it make far less noise at 40 steps/mm. also still very slow, like I said mm/min in pronterface doesn't seem to do anything (it did at 40 steps/mm). Also any idea how to get microstepping to work?by peqo - General Mendel Topics
Re: changing steps_per_unit affects speed - 13 years ago
I used a ruler. measured how far it went with 10 mm at 40 steps/mm. it went 75mm so 40*10/75 = 16/3 It is quite low because: I only have 1/2 micostepping (8x and 16x dont work for some reason?), T2.5 belts and a 32 tooth gear.by peqo - General Mendel Topics
Re: changing steps_per_unit affects speed - 13 years ago
I have tried using 5 and 16.0/3 and 5.333 as steps_per_unit values. No difference.by peqo - General Mendel Topics
changing steps_per_unit affects speed - 13 years ago
Hello. I am building a prusa with a sanguinololu 1.3a. And this is my current sprinter firmware config: I used to have steps_per_unit on the Y axis at 40 and motion was smooth. I calibrated it to 16/3 (which is the correct value) which caused the motor to move very slowly and loud with lots of vibration. How can I fix this? I have tried: Adjusting mm/min in pronterface (makes no difference) iby peqo - General Mendel Topics
Re: warning: don't buy cheap motors for your reprap! - 13 years ago
I was running them at 1.1 A, with heatsinks on the drivers and fans. I tried switching drivers, switching ports on the motors. When I got a new motor, I simply unplugged it and plugged in a new one, which worked straight away with no changes. Definitely wasn't from overheating, it didn't just stop and start again, it was more like vibrating.by peqo - General Mendel Topics
Re: warning: don't buy cheap motors for your reprap! - 13 years ago
Its in the link: 42BYGHW609. Maybe I just received a bad batch?by peqo - General Mendel Topics
warning: don't buy cheap motors for your reprap! - 13 years ago
I purchased these cheap motors from a company called "Wantai Motor" of ebay a couple of months ago and I have been having problems with them since the beginning. • They cannot microstep (they just start vibrating) • they make a ton of noise • after about 50 continuous rotations, they begin to stutter and have to be powered off for about ten seconds before they can be used again.by peqo - General Mendel Topics
Re: Pololus overheating with heatsink and fan? - 13 years ago
I still have not found a solution.by peqo - General Mendel Topics
Re: Pololus overheating with heatsink and fan? - 13 years ago
Sorry guys! I posted the wrong link to the steppers I have. Mine are 3.4v , not 12. Here is the right one:by peqo - General Mendel Topics
Re: Pololus overheating with heatsink and fan? - 13 years ago
yeah i tried 0.4V. It doesn't bind at that voltage, just stutters. Turning it up a bit more somewhat improves the stuttering. My axis are well oiled and slide well. These are the motors I have: edit: i posted a link to the wrong steppers! Mine are NOT 12vby peqo - General Mendel Topics
Pololus overheating with heatsink and fan? - 13 years ago
I'm building a Prusa and I get this problem on all my axis when I have them move. They stutter when they move. I tried adjusting the trimpot which helped partially. Now it can move once or twice without stuttering and then it starts stuttering. If I keep moving it after that it stutters more. Then, If I turn it off and back on again, the process repeats. The reason for this that I can think of isby peqo - General Mendel Topics
Re: Motors move loudly and vibrate - 14 years ago
Sort of fixed now. I cleaned the contacts of the pololus and 1 of them started working. I had some flux in the connectors, and I can't seem to clean them out properly.by peqo - General Mendel Topics
Motors move loudly and vibrate - 14 years ago
I am using a Sanguinololu w/ Sprinter, and running it with Pronterface. As you can see in the video, the first movement the motor make is very smooth, but after that it is very loud and vibrates.by peqo - General Mendel Topics
Sanguinololu not connecting, error when uploading - 14 years ago
When I plug in my Sanginololu, device manager does not acknowledge a connection. Uploading a sketch produces this error: avrdude: stk500_getsync(): not in sync: resp=0x00 avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51 The power led is on. I re-soldered my FTDI chip and re-checked the connections. I re-burnt the bootloader. Yes, I have a jumper on AUTO-RST andby peqo - Sanguino(lolu)
Source for pulleys? - 14 years ago
Following this guide: I wanted to buy these pulleys, but they are out of stock. Anyone know of another source of good, inexpensive pulleys?by peqo - General Mendel Topics
Re: Introducing the Prism Mendel - 14 years ago
Instead of T-slot nuts, wouldn't regular square nuts work?by peqo - General Mendel Topics
What are the best cheap steppers? - 14 years ago
Thisand this look good. Has anyone tried steppers from that company? Would they be strong enough to move a prusa?by peqo - General Mendel Topics