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Robots, children's blocks, wooden clocks, its all good! Here's my idea and here's the [[page]] on RepRap's wiki where we can log in and click "edit".
Re: TAP-XXX Nozzle Contact Sensor - 1 year ago
A nice demonstration, but for my peace of mind that it is truly consistent, can you try the following. Get a map of the surface using at least a 5 by 5 grid and save the readings. Move the sensor to two other positions fairly far from, and not symmetrically the same as the first position Repeat the mapping of the surface for each new position. Compare the grids, subtracting each from the originby leadinglights - Tech-Talk
Re: Extruder Temperature Sensors - 1 year ago
Quoterq3 ........................................... Should I gold flash the silver heat block? It's immersion gold, takes 30 seconds. Pros, Cons? Looks cool, costs money, wastes resources, adds corrosion protection (not). While I don't know for sure if silver will tarnish in a hotend/plastic fume environment, I can offer the following supporting evidence:- My pure copper hotend bodies were insby leadinglights - Tech-Talk
Re: Extruder Temperature Sensors - 1 year ago
I did not realize that platinum RTD sensors were available at low cost and in small sizes. The last time I used a PT100 sensor it was fiercely expensive, quite bulky and needed a dedicated amplifier. For the time being I will stay with my thermocouples for the reasons stated earlier but hope to find a project where I can use a PT1000 sensor. In passing though, to go with your platinum sensor, sby leadinglights - Tech-Talk
Re: Extruder Temperature Sensors - 1 year ago
I tend to use thermocouples for hotends – this is not to disagree with your points, but I find the absolute accuracy is not too important as keeping the delivered temperature constant. From this point of view, does the temperature change with plastic flow and other causes such as unwanted nozzle cooling, limitations on the PDI control etc.. Resolution for thermocouples can be similar to thermistoby leadinglights - Tech-Talk
Re: Compact Belt Idler/Tensioner - 1 year ago
Regardless of the merits of the idea, there tends to be little discussion of this posting, or of many others because:- Most of the 275 hits (at this time) were from net indexing bots. Many of what remains were from people looking for stimulation who click on several items a minute in a daze of apathy. Some are from people who would contribute but are afraid of trolls and smart-arses disagreeingby leadinglights - Mechanics
Re: racial supremacy is allowed in reprap.org 2.0 - 1 year ago
For info, ayozek did try to get a discussion going on Reddit, but it was removed by the moderators in about 2 hours Mikeby leadinglights - Administration, Announcements, Policy
Re: racial supremacy is allowed in reprap.org 2.0 - 1 year ago
Now reported as you can neither justify your threats, or cite any reason for your definitely hateful and possibly racially motivated remarks. Mikeby leadinglights - Administration, Announcements, Policy
Re: racial supremacy is allowed in reprap.org 2.0 - 1 year ago
Please put links to Reddit and other any other forums where you discuss this. Links to the case in the EHCR would also be informative. I would be interested in knowing what part or words or alternatively what construction of meaning you put on VDK's posting as quoted below. QuoteVDK ... if you're intereted, how ressources can be badly dumped or wasted, then look for chinese "tofu-dreg" projectsby leadinglights - Administration, Announcements, Policy
Re: recycled plastics,metals and geopolymers, biopolymers for numerical machines (extended) - 1 year ago
Quoting from your earlier posting Quoteayozek ...............i do not reply nor play the game with racial supremacists, for them i only use exposing, shaming, rejection or violence if necessary. ............. Do you realize that threatening violence is actually illegal in most countries. Another point, quoting again from your last post, you use a term which could be construed as being intended tby leadinglights - General
Re: recycled plastics,metals and geopolymers, biopolymers for numerical machines (extended) - 1 year ago
I find it hard to find anything in the posting by VDX that appears to be what ayozek is complaining about - perhaps not capitalizing the word Chinese?? QuoteVDX ... if you're intereted, how ressources can be badly dumped or wasted, then look for chinese "tofu-dreg" projects Finding the conduct of a nation reprehensible does not equate with insulting the peoples of that nation as that conduct isby leadinglights - General
Re: Silver Heat Block - 1 year ago
The figures I get for volumetric heat capacity are from and I get J/g.K g/cm3 J/cm3.K Aluminium 0.900 2.7 2.4300 Silver 0.233 10.5 2.4465 Copper 0.386 8.9 3.4354 The thermal conductivity of Aluminium alloys is significantly worse than pure Aluminium, but compared with Copper alloys itby leadinglights - Tech-Talk
Re: Silver Heat Block - 1 year ago
I would be interested to see what your results are as I looked in some depth at various materials and geometries for hotends and came to the conclusion that the race is a lot closer than you might think. One starting assumption that I used is that having a high specific heat is a good thingas it acts a a heat store while the heater is trying to catch up. From this point of view, while Silver hasby leadinglights - Tech-Talk
Re: Metal ball joints source? - 1 year ago
The MP Jet joints you pointed at do seem far too small. I would suggest searching for "rose joint" or "Rod End" on Google. Alternatively you could also look at Igus ball joints which are either partly plastic or all plastic but out-perform most all metal ball joints. Another possible is to look at magnetic joints - use Haydn Huntley's joints Don't make your own magnetic joints unless you haveby leadinglights - Delta Machines
Re: Delta home issue - 1 year ago
I only used "G0 Z20" as an example so it would not crash into the bed. When you did "G0 Z0", did the effector go down to the bed or move at all? Were there any erro reports? Mikeby leadinglights - Delta Machines
Re: Delta home issue - 1 year ago
What value for Z does it show on the display immediately after homing? It should show the maximum possible Z value - i.e., the height from the bet to the nozzle tip when homed. Do I understand correctly that doing something like "G0 Z20" does not result in the effector moving down? Mikeby leadinglights - Delta Machines
Re: Delta home issue - 1 year ago
Auto Home, along with Home All and Home Z should all go upwards. Don't wait for it to crash into the bed if it goes down, just reset or whatever immediately. Did you install your latest firmware and did it make any difference? Per jcs's question, is the firmware set to Delta in Configuration.H? Did you try changing the motor directions in the firmware? If so, what was the effect? Did you try chby leadinglights - Delta Machines
Re: Vacuum hold-down for 3D build surface. - 1 year ago
A recent comment on one of my YouTube videos asked if I still used the vacuum hold-down. In trying to find something to link to in answer, I found that I had hardly documented recent changes in this system on my newest printer. Since I usually document everything up to the wazoo, I am now doing the documents and putting this bit on the forum for anybody who wants to build their own vacuum system.by leadinglights - General
Re: Delta home issue - 1 year ago
It is rarely possible to simply install a firmware in a 3D printer. In almost every case you will need to go through the Configuration.H (and possibly some other files) and edit them to match your printer before compiling and writing to your printer. There may be many lines to change, and each will need at least a cursory investigation to find out what needs to be enabled or disabled, and what vaby leadinglights - Delta Machines
Re: Delta home issue - 1 year ago
@MikeCL. Can we look at what is happening one item at a time. Ignoring G0 Z whatever for the moment and concentrating on the "Home All" button or perhaps G28. Does the effector home in an upward direction? After reaching all three limit switches, does it do a little dance, going down a couple of mms and then slowly up again to home? Does the display or control program show that the Z value is noby leadinglights - Delta Machines
Re: Delta home issue - 1 year ago
When you mentioned the Repetier app I assumed that you meant but you have put some very Marlin looking code in Pastebin.com I used Google to look up the phrase "DELTA does not invert" but some people seem to be saying that it does, others that it does not. I think the only thing left is to reverse the motors by swapping one phase on each plug - typically swap pin 1 and pin 2. Alternatively, revby leadinglights - Delta Machines
Re: Delta home issue - 1 year ago
A couple of thoughts: If your Z home is at the top (Z_Max) then the Z probing will not work until the printer has been homed. Generally, although your configuration may be different, until the printer has been homed, moving the effector in a downward direction will either not work or will be limited to something like 5mm. jcs has covered the reversing of the direction but I should re-stress whby leadinglights - Delta Machines
Re: Dual extrusion delta - 1 year ago
Hi brampie, It is sort of a work in progress. Mostly though, I use it to explore better ways of doing things: Can it be done cheaper, more reliable, simpler, or more accurate. Mostly though, I try to explore the neglected technologies in FFF printers and whether commonly held assumptions are true. For example, can a wirewound resistor be a better choice for a hotend heater than a heater cartridgeby leadinglights - Reprappers
Re: Dual extrusion delta - 1 year ago
Quotebrampie ......................................... -I felt like getting offset Z correct for both nozzles was too complicated .................................... I can only help with one of your items. See I like your idea of using a pneumatic lift to lift the inactive head above the active one and may even do some quick experiments to see if I can bring anything to it. Mikeby leadinglights - Reprappers
Re: Z Axis Design Help - 1 year ago
Looking at it I think it may be a large diameter worm and a small diameter worm wheel - I don't know why they would do that but there seems to be no engineering reason why not if the load is light enough. Perhaps other constraints for some other use dictates where the input and output shaft had to go. Edit: Thinking about it, maybe having a large diameter worm and a small diameter worm wheel woulby leadinglights - CoreXY Machines
Re: Very Different Extruder in action - 1 year ago
Very nice, it looks exceptionally light as well. What is the black line around one of the rollers? Mikeby leadinglights - Tech-Talk
Re: Report on under bed sensor problems - 1 year ago
@rq3. Your mass-loaded piezo sensor may well avoid the problems that I have seen but it is not impossible that it will be troublesome on other beds - like areas that are completely dead. I was happy with my tests on my early printers until I drilled down in the elusive search to get triggering within 1 micron/1 millisecond/1 gram when I started seeing problems - then my newest printer gave me somby leadinglights - Tech-Talk
Re: Report on under bed sensor problems - 1 year ago
Just a quick report on the status of this investigation - for both remaining readers of this forum. I have now used a touch sensor on my old delta printer to demonstrate this problem even on a printer that has given very reliable bed leveling for many years with underbed sensors. On the diagram below, I leveled the bed first using the three underbed piezo sensors with probes at S1, S2 and S3, anby leadinglights - Tech-Talk
Re: Thermistor Extension Lead, Ender 3 - 1 year ago
I don't know what country you are in or how long you want the leads to be, but on eBay in the U.K., I found the following JST 2-pin male to female XH 200mm long extension leads - Mikeby leadinglights - General
Re: Configuring Z probe Offsets for Dual Extruder Heads - 1 year ago
Although I can't contribute anything which has not been covered by Dust and dc42 regarding software, perhaps this video may have some useful ideas for measuring the X, Y and Z offsets of the extruders and touch sensor - BLTouch in your case. The Otoscope camera used is about £8.00 on eBay and the mirror I used was a front surface dental mirror - other mirrors will work equally well but don't givby leadinglights - General
Re: Extendable Z-probe with Shape Memory Alloy actuator - 1 year ago
QuoteVDX ... you could add a jet of cold air to reduce the recovery times The cold air jet could be switched on and off by a valve with an SMA actuator. The slow recovery time of the valve could be improved by a jet of cold air which.......... Must stop adding complexity. The latest development removes the push-rod entirely and replaces it with a swing-out lever reduces the weight by about 1by leadinglights - Tech-Talk