I just found out that the Smoothieboard doesn't really work with multiple thermocouples - at least of now. Nice - so basically the MAX6675 is supported by 1.1 RC. Could you show me how you wired it up? For dual MAX6675's I think I have to wire everything up in parallel except the CS and that can be any pin, correct?by 3DTOPO - General
Thank you! We are quite excited to find out ourselves!by 3DTOPO - General
Following MIT's Glass Lab on it's heels, come follow us on our adventure to build a 3x3x2 foot optical glass printer. We are not far from our first firings! Our build blog: Glass Printedby 3DTOPO - General
Hmm - oh well. Not worth the trouble when the Smoothie board does what I need. Would have been nice to save the $$$ (I am already over budget of course) but I guess that is the end of the thread for me.by 3DTOPO - RAMPS Electronics
I think the probe material is stainless steel. I wish I knew if it will only support one or more thermocouple on a RAMPs. Here is the pull request for Sprinter for the MAX31855; surprised it never got accepted?by 3DTOPO - RAMPS Electronics
Hmm apparently a pull request has been made to Sprinter for the MAX31855? gitgub:pinski1?SanguinololuThermocoupleby 3DTOPO - RAMPS Electronics
BTW: Here's what my RAMPS board looks like configured to control 5KW of power on redundant SSRs - with alarm! Everything tested and working - just need to figure out the thermocouples. :'(by 3DTOPO - RAMPS Electronics
Yup I realize how hot that is.by 3DTOPO - RAMPS Electronics
Hmm actually apparently the AD595 only works to 500C and the 6675 only to 1024C. I actually need to go a bit hotter than that so what would be involved with getting the MAX31855 running on RAMPS? Can anyone point me to how to build a level-shifter? I am not an electronic designer but can read simple schematics...by 3DTOPO - RAMPS Electronics
I need something RAMPS 1.4 compatible since that I was I am working with. It may be obsolete but they are readily available on Amazon: SainSmart MAX6675 Module I can get that for $14 including 2nd day shipping. I only see two thermocouple amps listed in the Marlin config file, and I don't see any AD595 modules readily available. So are there any other supported besides the MAX6675?by 3DTOPO - RAMPS Electronics
For the what I have in mind a solenoid won't work. Anyhow - I haven't ran across that in the Marlin code. Do you know what file the solenoid defined in? Might led me to a good start...by 3DTOPO - RAMPS Electronics
Thanks Olaf. Bummer - I should have checked before I ordered. What about the MAX6675, can more than one be used, or can it only be used for Sensor 0?by 3DTOPO - RAMPS Electronics
One more related question; In the Marlin Configuration.h file it states the following: //// Temperature sensor settings: // -2 is thermocouple with MAX6675 (only for sensor 0) // -1 is thermocouple with AD595 Does that mean I can only use one MAX6675 chip on Sensor 0 only? In other words can I use MAX6675 (or compatible) on TEMP_SENSOR_0, TEMP_SENSOR_1 and TEMP_SENSOR_2?by 3DTOPO - RAMPS Electronics
Does anyone know if its possible to use the SainSmart MAX31855 thermocouple amp with RAMPS? I am running Marlin. SainSmart MAX31855by 3DTOPO - RAMPS Electronics
I am using the Marlin firmware and need a stepper motor (not the extruder motor though) to move forward a number of steps on retraction and reverse when a print line begins. It is to plug a nozzle. I guess I want it to work just like the E stepper but ignore feed commands and only retract/tract Does anything like this already exist? Otherwise, I haven't worked much with the firmware so pointersby 3DTOPO - RAMPS Electronics
One of the most complete and trusted that I know of is the US NAVY Foundry Manual: Online free here: You can buy it print from Amazon. I am sure there are many "backyard casting" books on Amazon too.by 3DTOPO - Casting and Moldmaking Working Group
Greetings, I would like to be able to vary the extrusion feed rate based on the diameter of the filament in real time. It would allow some compensation for uneven filament. I vaguely recall reading about the idea some time ago but I can't remember where. How hard would this be to add to say Marlin? Seems like it wouldn't be too difficult to feed in an analog signal from a measurement device aby 3DTOPO - Developers
We recently published a complete documentary of the process I use to transform a 3D printed PLA part to a machine ready aluminum alloy casting: Please let me know if you have any questions!by 3DTOPO - Casting and Moldmaking Working Group
I usually burn out PLA at around 1000F. We recently published a complete documentary of the process I use to transform a 3D printed PLA part to a machine ready aluminum alloy casting: Please let me know if you have any questions!by 3DTOPO - Casting and Moldmaking Working Group