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Interesting thread here. I have a ramps-fd I got cheap off ebay and am considering modding it to be a bit safer (pullup resistors on fet drivers and on board 3.3 supply regulator). For me the issue of the fet Rd is a moot point since I am using a SSR to drive my heat bed. I built my own heat bed by gluing sand resistors to the bottom of an aluminum plate (JB-Weld), and I run the bed off of 48v
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kscharf
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RAMPS Electronics
It's been about 6 months now since I've built my
Wilson. You can see photos of it on Thingiverse that I posted on the entry for the Wilson. I've had a few problems with under extrusion (clogged nozzle and weak motor), skipping on X and Y axis (low current adjustments), and some software config issues. I cannot find anything wrong with the mechanical design of the printer itself however. Mart
by
kscharf
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Extruded Aluminum Frames
Take a look at what's in repetier firmware. It DOES scroll for long file names.
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kscharf
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Developers
I've read the assembly instructions on line and something seems to have been left out. In the pictures there appear to be two "grub" or "locking" screws that would clamp the heatsink on the nozzle once the transition zone length has been set. The instructions do not mention the need to tighten these, I assume that this would be required to prevent the nozzle from moving in the heat sink.
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kscharf
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General
Yet another spinoff of the Printrbot simple / Smartrap series with a bit of the i3 thrown in. A nice looking design, but I always wondered how stable those cantilevered x/y axies were. Probably the only way to make them work right is with a light weight bowden setup as this is.
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kscharf
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Smart_Rap
Please excuse me if this has been answered here before.
Does the Prometheus hot end mount in the same 'slot' as J-head or ALUhotends?
I had excellent results with the V5 ALUhotend on my repstrap, but the V6 I have on my Wilson seems to be having flow problems with the same PLA filament that worked well on the older hotend.
I have not yet tried swapping hot ends between the machines (it would be
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kscharf
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General
Why not wire the fets to the outputs of U1 and U2 via 220k resistors as in the V2 schematic? Also can build a small board to plug into the I2C headers that contains the eeprom rather than solder it to the board. Also your instructions talk about thermistor issue, but no fix for that is mentioned.
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kscharf
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RAMPS Electronics
Is there a way to enter the Marlin thermistor tables into Repetier firmware from the web configuration page? I've been doing this by hand after the fact, but I'd like to be able to only have to do this once and have the website be able to import it into a new config file from my old one.
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kscharf
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Repetier
Another thing I need to figure out is what to add to configuration.h to force it to actually build for the display. I might have to build a config file from the on line tool containing the reprapdiscount graphical display, and then modify the other files to use the SSD1306 instead. I can tell by the size of the built image that my attempt at including the display in the build failed, it should
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kscharf
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Repetier
I'm looking at building a display for my RepRap Wilson using an Adafruit OLED display. These tiny displays are very readable due to their high contrast. They use an SSD1306 controller that is supported by the U8GLIB used in Repetier Firmware. It looks like the following changes will add this support:
UI.cpp ~ line 617
#if UI_DISPLAY_TYPE == DISPLAY_U8G
//u8glib support two different control
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kscharf
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Repetier
Have you ever tried switching back and forth between PLA and ABS? Some hot ends will jam doing this. That may have also been a problem I had with my jhead lite.
BTW I haven't seen you on ebay for a while. Right now I'm building a Wilson (got an aluhot end for that), but I also am thinking of building a smartrap. Might want to try the jhead lite on that one (would buy an assembled one with a .
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kscharf
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Smart_Rap
Actually once I put a fan duct on my PLA cooler aimed at the bed the problem went away. I still think a small 25-30mm fan directed at the upper part of the J-Head lite would be a good idea, or maybe even encasing it in a small piece of Cu tubing to act as a heat sink for the cold end. I was getting some clogging with PLA. I think you sourced a 6.8 ohm resistor, a 5.6 ohm might have been more o
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kscharf
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Smart_Rap
If you use a fan with the Jhead lite don't let any air blow on the heater block. The thing is under powered and can't maintain temperature if there is any airflow on the nozzle / heater block.
I had jamming issues with this hot end on PLA, I am now using an ALUhotend which I recommend highly!
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kscharf
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Smart_Rap
I'm starting to build a Wilson after getting my repstrap to work. I've now got almost all of the plastic parts printed for it in PLA, and I've ordered a kit of hardware (Tslots, rods and metric hw) from MJRice who designed the Wilson. Marty has an ebay store and he's willing to customize his kits to your needs. I got my motors surplus and am now sourcing the electronics via ebay. Hope to make
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kscharf
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Extruded Aluminum Frames
You'd need a fuse in there someplace! I simply meant that you don't need to double the voltage on the whole system, just on the heat bed. And you're right you are going to be limited to bang-bang control since an AC switching SS relay probably won't work well with PID (unless the software monitored the AC line and only switched on the correct portion of the wave form).
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kscharf
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RAMPS Electronics
I've been uploading my files to the printers sd card and disconnecting the printer from the computer once the print is started. Very reliable this way.
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kscharf
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Repetier
A good idea would to ALWAYS change the EEPROM flag number EVERYTIME you upload new firmware. This will invalidate the eeprom and make use of the current compiled in settings for the first run.
I wonder if the locations for eeprom values changed from 0.81 to 0.91. That would be a problem if the flag number position was the same between both and other items moved!
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kscharf
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Repetier
I've got a similar display (red pcb from Chinese supplier on ebay) that works fine with repetier firmware, but when I tried marlin it would sometimes go nuts and display junk after working fine for a while. I did have to put a firmware patch in to slow down the encoder which generates four changes per detent. Stock repetier would skip menu items until I changed the decode table.
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kscharf
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Repetier
I'm running the new v1.0.3 repetier host for Linux. If the last time I exited the program I was NOT in easy mode the echo view of commands appears on the bottom of the window. However if I toggle from expert mode to easy mode and then toggle back to expert mode the echo view NEVER comes back. The only way to see this is to enter expert mode, exit the program, and restart the program.
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kscharf
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Repetier
After a bit of head scratching I tried this again. I was updating my computer from Linux Mint 13 to Linux Mint 17. During this process I backed up my home directory and then installed the new OS on top of the old one (actually I used a new disk drive so I still had the old OS to fall back on), and I cloned the disk containing my old /home directory so that all my files were automatically export
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kscharf
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Repetier
Well, I can get the 5.6v ones for under $5 each. At that price I suppose I can give them a try, and I can probably run the steppers on 24V easily enough. It's actually easy to isolate the heaters and fans on the ramps board from the stepper motors since the MOSFETS switch the cold lines. You don't HAVE to connect the 12v ends of those back to the ramps board, they can go though their own fuse
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kscharf
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Stepper Motors, Servo Motors, DC Motors
I've found a source for some low cost Nema-17 motors but they might be a little on the feeble side for an i3.
The spec's are:
5.6v, 0.85A, 6.3 ohm, 7mh, 4 wire bipolar. These are a custom variant of a type made by SEI. Other 4 wire motors in this series of motors, have a rated torque of 50oz/in, the 6 wire motors in the series are rated at 38oz/in. The sizes of all of these motors are standard
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kscharf
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Stepper Motors, Servo Motors, DC Motors
I thought I had the user temperature table working in Repetier firmware, it looks like it IS working on my extruder. I had added the table for thermistor #7 from marlin in the configuration table, but I just noticed that I the number of temperatures was wrong (the table is 58 pairs long, I had the number at 67. It was copied from a post on this forum.) and YET it compiled. I corrected the num
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kscharf
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Repetier
Never mind the connect. After upgrading to Linux Mint 17 KDE (Kubuntu 14.04 based) stl files that used to load under mint 13 / V0.95F failed to load (red X in right hand column on placement window). Other STLs that did load were scaled so huge they don't fit on the bed of the printer. And yes, I did check my printer configuration, it looked the same as it did under V0.95F. Of course the blam
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kscharf
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Repetier
Finally got my repstrap running and printing. I just printed the 20mm box with the J-Head lite MK-II using PLA. No jams so far. The heater does seem a bit anemic though, with the PLA cooling fan blowing on the bed at 25% power the hot end drops in temperature from 190C to 170-175C (still ok for PLA). Maybe I need to re-calibrate the PID with the fan blowing? With the fan off, no problems (I
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kscharf
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For Sale
Has anybody here implemented the bed auto level (z probe) feature on Repetier firmware for a cartesian printer? I'm not sure how to set up the configuration.h file for this, even after reading the instructions (which I think were for a delta printer anyway).
I have a z-probe switch mounted on a movable servo activated arm, wired to my X-MIN endstop, and I have set the Z_PROBE_PIN as ORIG_Z_MIN_
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kscharf
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Repetier
For the time being I am still working on my printer using Repetier host and Repetier FW. I'm very happy with the support I've been getting on this forum with the firmware, and I will probably have a few more questions before everything is configured correctly. I'm more interested in seeing the source for the printer firmware side of things than in the host (so long as the communication protocol
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kscharf
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Repetier
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Pages: 123
- 6 years ago
[Many Pictures] - 7 years ago