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General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: A call for help/ideas to develop the [[Heated Bed]] Build Platform - 13 years ago
If you are using a metal plate as your base, why not use an infrared lamp set up below the plate to heat it? It would be simple to control the heating effect using diac/triac chopped mains control and feed back sensor such as a thermister. Basically, you could use the heater control circuit from the extruder and control an electronic relay rated for mains voltage. You would need some sort of elecby RonP - General
Re: Looking for likemind reprap to start building - 13 years ago
OK guess not.by RonP - Australia, Sydney RUG
Re: mcwire/mendel and aluminum t-channel? - 13 years ago
Until we get metal extruders, or solve the issue below, all of what we make at the moment are really RepStraps to me. The problem with making say an ABS RepRap is to design a machine that can make something that is the same size as itself. Once we work out that little physics problem we can then work on a true RepRapby RonP - General
Re: RepRap Software for RepRap Hardware - 13 years ago
S an aside, the old Commodore 64 had a very usable Forth o/s available. Having played with it, I would suggest, going by the rest of the RepRap information available , that Forth not be promoted. With Forth, the documentation is so important for any one to work on it later on, even the original writer needs it. Forth is about the only langauge that almost needs no encryption or copyright- justby RonP - Firmware - experimental, borrowed, and future
Re: Looking for likemind reprap to start building - 13 years ago
Am in Minchinbury, am doing my planning for a repstrap. Anyone for a get together at a pub for a Saturday night? Toongabbie or Colyton? 30 Jan 2010?by RonP - Australia, Sydney RUG
Re: Reprap motherboard - 13 years ago
Please clarify - if a Sanguino is plugged in , the other uP is 'over ridden' and so the SMT up can be left on the PCA, or is it a case of plugging in the Sanguino after desoldering the SMT uP?by RonP - Controllers
Which CPU - 13 years ago
Ok, stumbled across this idea and want to do it. In my case it will be a RepStrap. I need to have either the X or Y axis go to 300mm, preferably 400mm total product length for this to be a practical system for me. It is already obvious that buying an electronics kit for most of the boards is the way to go. Getting a PCB made up , chasing down the components and getting them in, then the solderby RonP - Controllers
Re: McWire Firmware config - 13 years ago
Try giving one of the motors, X or Y , a bit of a hand. If the motor then kicks and keeps going, you don't have enough power available for the motor. Typically if you start to use a lot of short pulses within a time period, you need to raise the voltage to the motor coils. The reason is the impediance of the motor coils will only allow the current ( which is what the motor actually works on) to rby RonP - Controllers
Re: Drive-by Q on Stepper Motor Drivers - 13 years ago
TWZ - the driver chip has NO idea where the feedback signal is coming from - just that there is a voltage on a pin that it has to compare against its internal standard. So if you scale the sense resistor to give the right voltage just before the overload current/voltage is reached at the amplifier outputs, the driver chip will shut off current to protect the amplifier FETs as you want it to. Anby RonP - Controllers
Re: Help with sticking stepper motor - 13 years ago
Ok, first post and have not been lurking for months, literally started yesterday. Anyway, steppers will not be damaged by being dismantled and the rotor being handled gently. Drop the rotor = throw the stepper away. It will be unbalanced and will have lost part of its magnetism. It will most likely still work but will not be as strong in torque, or as even in movement steps. Both of the thingsby RonP - Controllers