Epop nice to hear they are moving on with the project Next time you see them tell them: We need to see Stiffness test data on printed v layup peices, the mechanical process is fairly easy but getting reasonable adhesion of base polymer to the cf is very difficult in small printer heads. The residence time required to wet the cf strands is crucial and a way of seperating them as they move throuby rm2014 - General
Put a couple of kilos in an oven at about 50 degrees C to stop stink (100c is way too high) for 1 hour, if they are still wet then put them in for another 1 hours, process immediately after drying. oven drying over long period is the best way. Let me know how you get on.by rm2014 - Plastic Extruder Working Group
For good quality filament (not that chinese s**t from ebay) try 3d-print-works.com UK company they sell 80m reels and like 15 colour packs as cheap as 8.99.by rm2014 - General
I would'nt hold your breath what they are attempting would test NASA. Their problem is not with the printer development, its with the materials, in order to get maximum stiffness out of the CF you have to make sure each strand of the CF is coated properly with the base polymer in this case nylon-its called wetting in the industry. If you don't do this then the CF strands will not stick togetherby rm2014 - General
Hi Rick Yes but only certain grades will work and there are 100s as you no doubt have found out, the only way to find successful ones are to do empirical tests. The answer to your bubble question is- its water trapped inside, it comes from pellet material ABS which is hydroscopic meaning it absorbs moisture, pellets being small and round have a very high surface area and easily absorb moistureby rm2014 - Plastic Extruder Working Group
Quotedc42 I've also changed the default PID parameters and made minor changed to the PID code to improve PID performance. dc do you mean you have improved on M303?by rm2014 - Ormerod
Quotedc42 ...and I've just published 57l-dc42 at (follow the link and press the Raw button to download). Improvements in this release: 1. When G92 is used, the bed transform is applied to the requested coordinates. This means that for example, if you do G92 Z0 then the firmware now assumes the head really is at Z=0 (i.e. just touching the bed), and will report the current coordinates with Z=0 iby rm2014 - Ormerod
QuoteOrmerod276 There are a couple of mentions of printing Nylon, anyone got any information on source and temperatures please. Yes it prints at around 245-250. You can try heavy nylon fishing line, Penn do stuff that is luminous green for night fishing at about £4 for about 50 metres, it is thinner that 1.75 but will still go through an extruder, I put 3 strands together through my makerbot 2x,by rm2014 - Ormerod
Quotebobc It is generally believed that these type of kits do not fall under CE directives and therefore do not require a mark. The issue is not clear cut, and seems to hinge on the interpretation of "product" meaning "manufactured article", although there is no specific exemption for "kits". The vast majority of products sold are finished articles, so it might be natural to assume that "product"by rm2014 - Ormerod
Quotedc42 Quoterm2014 im refering to RRP's pronterface In that case: have you actually tried Matt's web interface? I used to use RRP's Pronterface, but I find Matt's web interface much more usable for most things. The only tasks I still use Pronterface for are uploading config.g and reprap.htm, and debugging when I change the firmware. The point I was making which is probably lost since not morby rm2014 - Ormerod
Quotedc42 Quoterm2014 i think it should have been foreseen way before now at the design stage, its called a hazed analysis, professionals use it to analyse their designs before they reach the public domain! I agree. Putting the plate on the wrong way round is a fairly obvious hazard. I don't understand why RRP didn't make the heated bed pcb symmetrical, then it wouldn't have mattered. Another haby rm2014 - Ormerod
Try 235 for nozzle 115 for bed, thats what I use this time of year whatever the ambient, but 230, 110 in the summer, also bag ABS and stick a gel pack in it, ABS is hygroscopic, which causes little knots in the print.by rm2014 - Ormerod
im refering to RRP's pronterfaceby rm2014 - Ormerod
i think it should have been foreseen way before now at the design stage, its called a hazed analysis, professionals use it to analyse their designs before they reach the public domain!by rm2014 - Ormerod
why would you want this interface when there are interfaces many times better???by rm2014 - Ormerod
well….. all your efforts are all very laudable, applaudable, and martyrdumable, but there are loads of us that just want these machines to work without going through some sort of 3d baptism of fire, It seems (having spoken to RS) that most of these machines work, but for those that do not the product is souring the whole experience. I wish this z probe thing could be solved, i have spent weeks oby rm2014 - Ormerod
Well….. I am sure there are lots of happy campers, but on behalf of those who have had badly printed parts, bad instructions over the last 2 months, bad mother boards, which have had to be replaced, z probe problems, and a host of other niggles which have soured this product I would have to say that for the money in this day and age one should expect a product fit for purpose without having to spby rm2014 - Ormerod
Are there Delta rostock bed settings on slicer do you know I cannot seem to find one, but I hear a rumour? I am have trouble telling slicer 0,0 is at the centre of my bed, and so it tries to print off the bed?by rm2014 - Delta Machines
I like your rod end bearing design, I saw this on another machine and there were springs across both sides top and bottom, do you have any thoughts on why? I am thinking of changing mine to this design. I'm using 250mm long rods with a 200mm bed diameter,by rm2014 - Delta Machines
Ok that seems to have worked its now doing what I would expect thanks for the info. One other question I have- is there a Delta rostock bed settings on slicer do you know I cannot seem to find one, but I hear a rumour? I am have trouble telling slicer 0,0 is at the centre of my bed, and so it tries to print off the bed?by rm2014 - Delta Machines
Nice build, I am building a Delta Rostock myself at the moment, are you using a 175mm bed centre to rod configuration or is yours a smaller?by rm2014 - Delta Machines
Quotegmh39 Yea that definitely sounds like a PID issue. It sounds like you are WAY overshooting your target temperature. I am still have a problem, when M303 C8 S100 it on pronter face it returns- Bed auto tune fail, temperature too high. Any thoughts advice on this?by rm2014 - Delta Machines
At present i am experimenting with short strand (6mm) CF filled ABS, but I am having a few problems as it cools so fast, causing adhesion problems when printing. I have tried a 40% CF mix but tomorrow I am thinking of compounding a 30% batch and upping the print temp, anyone got any experience/tips of CF filled filaments??by rm2014 - Polymer Working Group
I am wondering if there is a cutter of some sort built in to cut the CF and allow transition to the nylon extruder head.by rm2014 - General
QuoteBuback it will be stronger than typical pla or abs or whatever, but it's still got the same issues with inter-layer strength, i assume. Introducing fibres into materials make them stiffer not stronger, any extra strength comes from the fibre itself not the base polymer, for them to be successful you have to "wet" the material, which is quite difficult to do in thermoplastics ABS or PLAby rm2014 - General
Thanks guys seems to have done sorted it out.by rm2014 - Delta Machines
QuoteRadian In another topic: Everyone who buys a printer is given the opportunity to sell back printed parts to RRP ...kind of like getting a deposit back. It strikes me that a significant part of the purchase cost could be discounted in a scheme such as this. Anyway, probably unworkable but I'm just curious to know what the issues are in mass-producing 3D printers the way RRP do it. I haveby rm2014 - Ormerod
Quotedmould it depends what stock reserve you keep. If you have sufficient plastic parts in stock to keep your production going for the time it takes to make another mould, there is no problem, and the plastic parts are cheap enough that you can often keep many months worth of production without it tying up any significant amount of money in stock, Dave (#106) Dave That's not necessarily trby rm2014 - Ormerod
Im building a Delta Rostock, my j head gets so hot it melts the PEEK housing, its the second time its happened, I have noticed even when I set the temp in ponteprint to 200 it heats up to 230 then backs off to 200, I suspect the thermistor may have something to do with it, any advice on this problem and how to solve it, what settings should be?by rm2014 - Delta Machines