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Here's what I made, here's a photo, and here's a link to the [[page]] on RepRaps wiki!
Re: [Solved] Prusa X and Y hits endstop twice before stopping - 12 years ago
kliment Sprinter if((home_all_axis) || (code_seen(axis_codes[0]))) { if ((X_MIN_PIN > -1 && X_HOME_DIR==-1) || (X_MAX_PIN > -1 && X_HOME_DIR==1)){ current_position[0] = 0; destination[0] = 1.5 * X_MAX_LENGTH * X_HOME_DIR; feedrate = homing_feedrate[0]; prepare_move(); current_position[by martinprice2004 - General
Re: serial lcd - 12 years ago
If your using arduino based firmware its very easy. There is a library specifically written to drive LCD displays which you would just add an include line at the top of the firmawre code. Then its simple one line code to display text. Start at the following link LCD Reference The only issue you may have is that you need around 10 - 12 i/o pins to drive it, so you may need to solder through pinsby martinprice2004 - Firmware - mainstream and related support
Re: Prusa X and Y hits endstop twice before stopping - 12 years ago
This is written in the firmware home command. It is an attempt to make the end stop position more accurate and is common on most machine tools. The axis advances quickly to the end stop, then retreats a little then advances more slowly to the stop which makes a more accurate measurement. Its a better way than simply advancing towards the end stops at slow speed as this would make the homing commaby martinprice2004 - General
Helium Frog Firmware - 12 years ago
I am just working on a chopped down version of the Tonokip / Hydra-mmm and thought I should share it with the community. The working principle is keep it simple, so I removed all the SD card support which many don't use and removed all the "options" which make the software complicated and difficult to understand. I will try to simplify it still further as there is still a lot of variables declarby martinprice2004 - Firmware - experimental, borrowed, and future
Helium Frog HF05 Robot - 12 years ago
Here is my updated "Prusa" type robot design. I have tried to incorporate all the latest improvements into one design package and added a few more of my own. Here are a few changes. 1) Completely remodelled parts (using Catia V5) to be metric based and easily printable without support material. 2) Reduced part count. 3) The use of cable ties where possible to reduce the number of bolts and easeby martinprice2004 - General Mendel Topics
Re: Not enough power? - 12 years ago
Yes the hot end should be about 6 to 8 ohms. The few hot ends I have wound from kits this equates to about 30cm of wire, but it will depend on the nichrome supplied. You may also have another problem. Some (Many!) PC supplies have rather optimistic power ratings and also some of the voltage monitoring gets confused if you join the output wires together or use the wrong ones. This results in theby martinprice2004 - General
Re: Retraction - 12 years ago
To explain a little, If your using FiveD code the extrusion length is incremental, so for example you will see in your g code the e value starts at zero and during the print the e value gradually rises up to the end of the print. This is the total length of material extruded during the whole print, not just how much is extruded on each move. So you start your print, the startup code may extrudeby martinprice2004 - General
Re: Prints stop after some unknown number of commands - 12 years ago
Yes I think you are correct the problem seems to be with the firmware and lowering the feed rate is just a "Fig Leaf" covering the actual problem. I have just done a quick rewrite of the sprinter firmware , removing all the SD card support, cleared all the extra configuration stuff I dont need such as alternative lookup tables, and pin declarations. I have just uploaded it and rerun the troubleby martinprice2004 - Firmware - mainstream and related support
Re: none of the motors are working 
- 12 years ago
nophead Wrote: ------------------------------------------------------- > Please stop repeating this misinformation in these forums Are you one of those Cyber Bullies everyone is talking about? Come on its Christmas.....good will to all men! I'm off to tell my mommy about you now.by martinprice2004 - General
Nice filament reel from B & Q (UK) - 12 years ago
I have been running my machines off one of these for a few weeks and its really nice and smooth with just the right amount of drag for a wades type extruder. It also has a wall mount should you need it. Under £20 and quite large for the money. B & Q reelby martinprice2004 - General
Re: none of the motors are working - 12 years ago
I think you need the endstops connected for all banks to work on the ramps board, otherwise only one axis works, I think it was the Y axis if I remember correctly. Make sure these are normally closed switches or you will have to fiddle about in the firmware. See here for pre flight check info Pre flight check There is also some test firmware you can upload which just moves the motors back andby martinprice2004 - General
Re: Hardening Rods - 12 years ago
Stainless tends to be harder than mild steel regardless of what grade you use and of course doesn't rust as quickly. You will know this if ever you have tried to drill a hole in stainless sheet as it readily burns out your drills. I wouldn't worry too much about wear as the loads on a reprap are really quite low and LMUU bearings spread the load over a large enough number of balls. Hardened rodsby martinprice2004 - General
Re: none of the motors are working - 12 years ago
You should also double check your stepper motor wiring. The clicking could be the two coils fighting each other. You may have the order of the four wires mixed up. I think its red, blue, green, black with the red nearest the power supply end of the ramps board. One further thing is that you may be stepping the motors too rapidly and they just grind and dont move. It could be you have not set yby martinprice2004 - General
Re: Prints stop after some unknown number of commands - 12 years ago
I'm having the same problems, ie random prints stops. Fast moves does seem to be the issue, but can be avoided as you have suggested. Using SFACT for gcode generation Using Kliment sprinter firmware Using Repsnapper host software on windows XP In SFACT > Craft > speed > travel feed rate (mm/s) reduced from 100.0 to 50.0 This generates F3000 instead of F6000 in gcode and seems to cuby martinprice2004 - Firmware - mainstream and related support
Re: SFACT The New and Improved Skeinforge !! - 12 years ago
Thanks for depeloping sfact, it works much beter than skeinforge, which seems to constantly change and put you back to square one all the time! I just want to report an error in the "multiply" field. Setting the value to say 20,20 moves the part 20mm toward the centre of the build platform, but putting unequal values in scales the X and Y of the gcode, so a square part becomes rectangular, howevby martinprice2004 - Skeinforge
Skeinforge problems - help please - 12 years ago
2011 11 08 Build 1) Deactivating Raft and Add raft, Elevate nozzle, orbit causes an error and the gcode fails to build. Switched to an earlier build 2011 09 29 and problem does not occur, but have other problems. 2) Activate Dimension is switched off, but it still generates FiveD code. I actually want this for my prusa, but want threeD for my makerbot? 3) FiveD gcode generated seems to have fby martinprice2004 - Skeinforge
Makerbot Cupcake Heated bed problems - 13 years ago
I run my Makerbot with a heated bed and I have just installed a separate power supply to drive it for more rapid warm up. The heated bed is switched through a relay controlled off the main board, but I am getting problems with the prints stopping half way through. Looks like its signal problems from the PC, or possibly the power supply of the main machine shutting down. When I switch the machineby martinprice2004 - General
Re: Large-scale 3d printer - 13 years ago
I@ brnd. I dont agree you need a heated build chamber and neither does Pazu or grassroots engineering. Double head extruders are becoming more popular. There are a few popping up on thingiverse. There is also a lot of work at producing removable ABS support material. I find it tends to be a little wasteful of material, so prefer to design my parts without overhangs where possible, but it dependby martinprice2004 - General
Re: Large-scale 3d printer - 13 years ago
I do get flustrated sometimes on forums as there always seems about 20 people giving reasons why you can't do something and very few saying why you can. Is it any wonder why development of the reprap is so slow. Scaling any design up doesn't work, its a basic engineering principle. "If an ant was the size of a man it would be able to lift a house"....in fact it wouldn't even be able to lift itseby martinprice2004 - General
Re: Delivery Problems Zapp Automation - 13 years ago
I have now recieved your order and all appears to be OK. I did contact you twice via email as you have said in your reply. Unfortunately the delivery you stated on each occasion was missed, on the first occasion by around a month and on the second by over a week. In addition to this when I ordered the items from your website, I specifically chose items that were according to your website in stoby martinprice2004 - General
Delivery Problems Zapp Automation - 13 years ago
I have been having problems with Zapp Automation and I was wondering if anyone else has the same problems. I ordered motors from them about 2 months ago which according to their website were in stock, but they haven't appeared. I contacted them by email and they said they were out of stock!!! Delivery expected in about 2 weeks. Its now three weeks later and there is still no progress. What a buby martinprice2004 - General
Re: RepRap Racing - 1/10 scale race series - 13 years ago
Here is a picture of the design so far. You can download the models in .stp format from my website if you want a closer look. Latest design image Helium Frog Websiteby martinprice2004 - General
Re: Best hot end? - 13 years ago
I have had hot ends push apart in my early days, but this was due to running the extruder at too low a temperature. Low temperatures raise the extrusion forces a lot and hence tend to push the hot ends off. This probably explains why there is some disagreement as to the threads in ptfe / peek debate, people run different temperatures and build at different speeds. I have used a plywood plate (aby martinprice2004 - General
Re: RepRap Racing - 1/10 scale race series - 13 years ago
I have an old Schumacher (an early Cat model). Looking at the parts they are too small to be reproduced exactly, so a gradual replacement with reprapped items would not work. It also raises copywright issues. I want to avoid using rod ends, turnbuckles and off the shelf items as much as possible as these are expensive and defeat the idea of a reprapped design. The design will be completely new,by martinprice2004 - General
RepRap Racing - 1/10 scale race series - 13 years ago
Gents, I am just testing the water to see if anyone here is interested in a 1/10 Radio control car design series. My proposal is as follows:- To design a basic car using reprap parts. The car will be 1/10 scale (similar to Losi, Tamiya, Schumacher single seat off road buggy) . Suspension will be rubber cone based as its difficult to reprap coil over shocks. Probably will use pencil erasers cuby martinprice2004 - General
Re: Greg's Hinged Accessible Extruder strength - 13 years ago
It could be an issue with the printed parts. I have found a wide variation in strength between similar parts, particularly when loaded. I only work in ABS and print my parts slow with double walls. Mechanically the parts are very good at 35% fill, but I have had delamination problems when trying to up the print speed. It would be interesting to see whether this affects the mechanical strength ofby martinprice2004 - Plastic Extruder Working Group
Re: Aluminum (aluminium) printing - 13 years ago
The reprap machine and its derivatives was really developed for lightweight applications such as Fuse Deposition Modelling (FDM) or paste extrusion, so is probably the wrong starting point for a CNC milling machine which benefits from a more rigid frame. Mig welding also gives off molten weld spatter which might melt a reprap machine! You should also consider the cost and accuracy of producing aby martinprice2004 - Powder Printing and Selective Laser Sintering
Re: Problem with holes - 13 years ago
I have been printing on a makerbot using skeinforge for a few years now and I cannot solve this problem. There is a setting in skeinforge "Perimeter Inside Stretch Over Perimeter Width", but I fiddled about for ages and still have had no luck getting the holes to the correct size. The way I print now is to widen the vertical holes in my model (I work at increasing them by about +12% for holes 4by martinprice2004 - General Mendel Topics
Re: Beltless reprap? - 13 years ago
You will need to use acme lead screws or similar and not standard threaded bar, otherwise the robot will be very slow (powerful but slow!) Lead screw and nuts are not the easiest thing to source cheaply. (McMaster is only readily available in the US) My delta robot design (Helium Frog Delta Robot) had this problem and in hindsight I would have been better using toothed belts. There is an additiby martinprice2004 - General
Interesting Video - Delta Robot - 13 years ago
I just spotted this on youtube. It looks a really neat project and is also arduino based. M&M sorterby martinprice2004 - Delta Machines