> Sounds like you are giving it about 60 steps/second. Is that as fast as it will go? What is the minimum requirement? I had a thread in the past about exactly this problem (http://forums.reprap.org/read.php?13,18493). I can film it at the maximum speed, it can be faster but not too much. Here is my exact settings: // define the parameters of our machine. #define X_STEPS_PER_INCH 5080 #defby khiraly - Mechanics
> Here is a video of my machine when working with a pen, I filmed the > machine from every possible direction: [] Here is the vimeo link:by khiraly - Mechanics
> Are you not putting this in the builders' blog > because you can't get put on the list of posters? I do not have a blog, and I didnt want to create just for this post. > Fara hvar enginn mega fylgja Which language and what it means?by khiraly - Mechanics
I couldnt attache more image to my initial post, so here goes the rests. The different tubes what I got: From left to right: the blue one is the Festo tube, the transparent is the pfe the semi-transparent (milk-like) is the ptfe tube pneumatic silicone tube (bit stronger then aquarium tubes) 1, 2, 3 the last one is the 15mm outer diammeter silicon tube with textil (for make a bit stronger).by khiraly - Mechanics
List of improvements of my McWire-variant Hi! As I promised[1], I write up all my modifications compared to the original one listed on the reprap wiki[2]. The state of the machine: done: - mechanically works, all the 3 axis moves, with motors. - arduino controls these motors with the 1.3 arduino firmwares - I drive it with the skeinforge's send.py program. - I have a pen holder mounted - I moby khiraly - Mechanics
Im calibrating and fine-tuning my seedling (with many modifications) since weeks. Im not using aluminium channel as guided rails, therefore I have different mountings. I use four ptfe blocks for guide my axis, and I screwed those blocks to the plastic. So it was straightforward to attach to this screws my pen holder. But basically you want to drill some holes to the plastic and attache your tooby khiraly - Mechanics
> Maximum feedrate is a bit of confusion for me (Im trying to understand > the arduino code). No need to understand At 500 it already shakes, at 100 its just too fast, so i finally set it to 80.by khiraly - RepRap Host
Ok I have found some tables about pitch on metric threaded rod: M4, pitch: 0.7mm M5, pitch: 0.8mm M6, pitch: 1mm M7, pitch: 1mm M8, pitch: 1.25mm M9, pitch: 1.25mm M10, pitch: 1.5mm Im using M6 threaded rod, one turn means 1mm travel. Currently 1500 GCode unit means 122mm in real life. I used the default setup in _init.pde file: // define the parameters of our machine. #define X_STEPS_PER_INby khiraly - RepRap Host
> What's the resolution on your X and Y Khiraly? That would let me know > if I'm in the right ballpark or not. I use a threaded rod (6mm dia) and a long nut. (I will make photos to be clear, or even start a blog. I posted a video some time ago in a previous stage of my machine, its here: ) Im currently figuring out how everything works (I accidently switched the X and Y motor driver cabby khiraly - RepRap Host
> sid, you sure about that? Backlash doesn't add up with with multiple > movements, And you? Is the backlash always symmetrical? (I need some more testing and experience to say it for sure) >Khiraly, is there really backlash on your leadscrew, and not the stage >itself? That would indicate that your couplings are very soft, or too >loose. I have attached a pen to my machineby khiraly - RepRap Host
I downgraded avr-libc to 1.4.5 from here: The resulted codesize: 15722 bytes (from 15684). I downgraded the gcc-avr from 4.3.0-2 to 4.1.2 (from the same blog). The resulted codesize: 13780 bytes I upgraded the avr-libc to the default one (in intrepid): 1.6.2-1 The resulted codesize: 14600 bytes Summarization: Maximum size: 14336 bytes avr-libc 1.6.2 (default in intrepid 8.10 gcc-avr 4.3.0 cby khiraly - RepRap Host
Ok. There is something definitely going on. I tried to compile this firmware using hardy avr-libc package. 1. I downgraded avr-libc to 1.4.7 (from 1.6.2). 2. I deleted all the .o files from arduino-0012/hardware/libraries/*/*.o 3. Compiled in arduino-0012 Now the binary sketch size is 15684 (it was 15462). I try to hunt down the right combination of packages...by khiraly - RepRap Host
Hi! Im using a Seedling machine where motor shaft are connected to lead screw using pneumatic tubes. (like aquarium tube, but a bit stronger). The backlash (number of steps before the lead screw start turning when changing direction) is exactly 8 steps (on axis X) and always the same. So Im looking for some software workaround, when changing the direction on a given axis, the system should steby khiraly - RepRap Host
Hmm, if I remove arduino-0012/hardware/libraries/ThermoplastExtruder directory, it compiles successfully. Why there is a conflict? (the ThermoplastExtruder comes from the Gcode-interpreter in reprap-arduino-firmware-1.3.zip file). But the size are too big: Binary sketch size: 15462 bytes (of a 14336 byte maximum) Bigger then 1kB, its huge... So why is that enourmous difference between differeby khiraly - RepRap Host
I try to summarise my case: I use ubuntu 8.10 (intrepid ibex) The avr versions: ii avr-libc 1:1.6.2-1 ii binutils-avr 2.18-3 ii gcc-avr 1:4.3.0-2 arduino 0012 I needed to extract the .zip files in a directory named 'reprap_new_firmware', else the arduino software pop-upped a dialog, asking permission to create this directory and copy the reprap_new_firmware.pde file into it. I needed to manualby khiraly - RepRap Host
Ok. Deleting arduino-0012/hardware/libraries/ThermoplastExtruder_SNAP_v1 resolves the error message. However the binary sketch size are still the same: Binary sketch size: 14432 bytes (of a 14336 byte maximum)by khiraly - RepRap Host
It also says the following errors on the arduino console: In file included from ThermoplastExtruder_SNAP_v1.h:37, from ThermoplastExtruder_SNAP_v1.cpp:1: /usr/lib/gcc/avr/4.3.0/../../../../avr/include/math.h:439: error: expected unqualified-id beforeby khiraly - RepRap Host
I have the same problem. I have downloaded reprap-arduino-firmware-1.3.zip, and I try to compile gcode-interpreter-experimental, the result are the same: Sketch too big: see for tips on reducing it. Im using ubuntu 8.10 (Intrepid Ibex), the relevant avr packages: ii avr-libc 1:1.6.2-1 ii binutils-avr 2.18-3 ii gcc-avr 1:4.3.0-2 Im using arduino 0012, if it matters. I have read tby khiraly - RepRap Host
> I will post photos tomorrow. Sorry for being late. I made some videos the day before yesterday. You can see it here: From since, Im olways running the Z axe for wearing a bit...by khiraly - Mechanics
Hi! I have finally built my repstrap mechanically (mcwire-variant), what is left is only the motor mount and the threaded rod. I have modified the original design, I use 6mm diameter rod and teflon (ptfe) block (drilled through 6.1 mm drill bit) as guide. All the stages moves a bit hard, because the teflon block and the steel rod interlock(is this the right word?) firmly, need a bit of wearinby khiraly - Mechanics
> I may work on it slowly as I build my mcwire. I dont know how you are progressing, but maybe you will do the same what I did. I completely abandonned the 608 bearings idea. I think the side of the U-profile aluminium will quickly wear out. (aluminium wears quickly against steel). And I think also, that ptfe will also quickly wear because there is not much surface on the U-channel aluminiumby khiraly - General
Hi! Im looking for additional info about Dave Cowden's high speed spindle. I was reading about this design here: More photos here: Some more additional questions for Dave: - How many pcbs are you making with it? So how durable is it? - The cpu cooling fan can support this (high) speed? (50-90k) How the skate bearings are wearing out? - Can you post some additional photo (from inside) or desiby khiraly - Mechanics
> By the way, why did you want more speed? What machine are you building? I have just suspected, that something is not right. So I builded my board wrongly (given that, I home-made the pcbs too) short circuit or open circuit, wrongly soldered or whatever. I suspected more, when you said, that its not normal if the stepper motor does not heat, and mine stays at room temperature or even colderby khiraly - Controllers
nophead: For now, I declare the circuit boards as working, and I will advance with my other parts. But Im thinking to by an DSO oscilloscope (owon), after I selled my analoge one. When I will have tha oscilloscope, I will repeate the experience with a resistance, and I will report back to this thread. Thank you very much for your persistent help at this debugging. I have learned much.by khiraly - Controllers
First: thank you very much for your explanation. It helps a lot to understand things better. > The current through the coil will be a sawtooth like the diagram I > referenced but the sense resistor only sees half of the waveform. This > is to reduce the dissipation in the resistor. I do not see this sawtooth like diagram. If it is the waveform of the coil, I should see it on output Aby khiraly - Controllers
I have used HER308 diodes, datasheet: It has 75ns recovering time. It is not as simple, that this diodes are open so fast, that they can conduct of the coils current? What should be the recovering time of these diodes? (100ns?)by khiraly - Controllers
> Does the L297 control the two bridges separately? Datasheet are here: The two coil of the stepper motor (A-B and C-D) are controled separately. The input In1(leg 5) and In2 (leg 7) controls one coil (A-, and In3(leg 10) and In4(leg 12) controls the other coil (C-D). > as if it does then there is a chance that the coils are wired > something like A->C and B->D instead of A-&gby khiraly - Controllers
> The diodes being the wrong way around would look the same as them not > being there. A basic test of the orientation would be that all the > non-stripped ends of D1->D4 should be connected to earth and the > striped ends of D5->D8 should be connected to 12V. If that doesn't > show try checking if pin 1 is connected to the striped end of D1 and > the non-striped endby khiraly - Controllers
I have double checked all the 8 diodes (D1-D8) on all the three boards. They are as on the schematic. I also zoomed really into the waveform on the rsenseA: And an another shot: Do you think its worth trying with an another oscilloscope? (with an analog one) By the way, the waveform looks to me like an attenuation. I have seen waveforms like this in PI(D) controllers.by khiraly - Controllers
So you mean all the D1, D2, D3, D4 diodes? high resolution: I will double check them. What is worst, that all my three boards are identical now (same waveform), so can not be really a wrong soldering...by khiraly - Controllers