Show all posts by user
General discussions. For specific printers / electronics / fabrication methods / softwares, please see other sections.
Re: y-axis calibration - 8 years ago
well my printer is bolted to a board that has leveling feet and all rods on all axes leveled both z rods same height and bed as close as possible to level all belts need to be tight and all steps/mm set right may require frame to be readjusted. if you have access to machinist level all the better or a dial indicatorby Roger123D - Printing
Re: NPN or PNP for auto bed levelling - 8 years ago
most proximity sensors need 10 - 30 volt you are probably using 12 volt the PNP type will source that 10-30v applied on the black output too high for arduino ramps needing 5 volts max thus use method mentioned in the last reply with a relay or feed a 4n25 opto coupler led side with the black through a 1k series resistor and the coupler output to the +5,gnd and signal in on rampsby Roger123D - Printing
Re: Every time I try to print the extruder jams - 8 years ago
check the steps/mm setting z axis, jumpers on z axis stepper driver and layer height.by Roger123D - Printing
Re: How to get G-code file on SD card? - 8 years ago
in repetier host you have menus top left one of them is printer and in it is the sd card manager look around at that and also the G code Editor icons one allows you to save the Gcode. I never use the SD card as most of my prints are done once and if I do print again it may be with a different filament and temperature in which case you need to re slice. I keep all stl files and associated cad on Uby Roger123D - Prusa i3 and variants
melzi v2 board - 8 years ago
how do you know if marlin is the installed firmware or if its repetier ?? firmware was already installed and nothing is stated in literature, I can import export eprom but that says nothing about marlin the running software is repetier host but not necessarily repetier firware one hint it has pid values for heater ? is it marlin or repetierby Roger123D - Controllers
Re: a4988 to 8825 - 8 years ago
yes after second look i see that the 8825 does 1/32 thxby Roger123D - RAMPS Electronics
ramps and usb - 8 years ago
if the ramps 12 volt is the source of power to the arduino via the 5 volt regulator what happens if a usb from a computer is plugged in as well supplying 5 volts or would a special usb cord be needed without power linesby Roger123D - RAMPS Electronics
a4988 to 8825 - 8 years ago
ramps has 3 jumpers per stepper driver works with a 4988 but what to do if using 8825 that has 4 jumper settings ?by Roger123D - RAMPS Electronics
Re: 
error: expected initializer before 'digipot_init' - 8 years ago
well only part of code is showing somewhere the digipot needs to be declared as a variable or constant of some type ie int float double unless it is part of some library you didn't include this is a new function being created but the first two lines should say int digipot_init the next line the same int ste....by Roger123D - Prusa i3 and variants
Re: NEMA-17 MOTOR STRONGLY BEEPING - 8 years ago
is this a kit that came with the motors or a complete new build in which case the motors may be too small to lift the load or too big requiring more than the 2 amps available ? what are the stepper motor numbers and if your using 12 volts try using 24 on just the vmot.by Roger123D - Prusa i3 and variants
Re: What are the cutouts in a Prusa Y-axis bed frame for? - 8 years ago
you pretty much have to follow the cutouts as it has to clear the y axis motor on the back and the belt idler pulley on the front. the side cutouts not necessary but front and back areby Roger123D - Prusa i3 and variants
Re: hight distance nozzle - 8 years ago
Whatever switch you are activating by hand should stop Z axis moving down ie stopping a home movement if this works it must be mounted to the frame and activated when X carriage comes down to a level where nozzle is touching the bed.Usually a screw is used to press the switch to allow nozzle (home) slightly below the bed then bed springs adjusted for 0.1 height above bed.by Roger123D - Prusa i3 and variants
Re: stepstick overheat - 8 years ago
The 8825 should have a small aluminum heat sink on it. Being warm or even hot is not a problem the whole little board is a heatsink and if it aint smoking and still working forget about it!by Roger123D - Prusa i3 and variants
Re: hight distance nozzle - 8 years ago
A Z axis mechanical stop uses a microswitch like the X and Y axis with the exception it is adjustable , I would have thought the printer would have one? If not one would need to be added. So either replace servo or add microswitchby Roger123D - Prusa i3 and variants
Re: Any idea why my printer has started doing this? - 8 years ago
i found that the blue tape was lifting off the bed so I stopped using it now use glue on glass especially with petgby Roger123D - Prusa i3 and variants
SD card - 8 years ago
What is the best way to add an SD card to a ramps setupby Roger123D - RAMPS Electronics
Re: 24V to 12V converter with Pololu footprint - 8 years ago
Linear Technology is the king of power supplies visit their web site for efficient voltage and current regulatorsby Roger123D - Reprappers
Re: Major Problem - A Key landed on my ramps board - 8 years ago
maybe put the key back on itby Roger123D - Prusa i3 and variants
Re: hight distance nozzle - 8 years ago
My advice is to scrap all auto leveling and level the bed manually too many people depend on this feature may as well get a toaster that inserts the bread all these filament auto loaders printing on a bed that is physically flat is far superior to a bed in outer space never have never will use auto level. This feature is added to some poor quality printers to compensate for inferior construction.by Roger123D - Prusa i3 and variants
Re: Given print at 205 degrees but machine printing at 207 degrees - 8 years ago
far too much worry of temp variations especially if you have a parts cooling fan and those few degrees won't affect printby Roger123D - General
Re: Download For Firmware with Ramps 1.4 - 8 years ago
you r looking for Marlin-RC.zipby Roger123D - Printing
Re: printing 90° angle problem. - 8 years ago
look at information on jerk settingsby Roger123D - Printing
Re: HICTOP Inductive Sensor Not Working - 8 years ago
i would try without the diodes the NPN should trigger as a low and pnp as a high level thus a pullup resistor for npn and pulldown pnp and set the true and false on Z axis min for a normally high = open there would be no need for a diode.by Roger123D - Prusa i3 and variants
Re: How long does it last? (Ceramic Cartridge Heater) - 8 years ago
make sure it is rated for voltage you are feeding it or get higher wattageby Roger123D - Prusa i3 and variants
Re: Infill3D extruder upgrade - Auto Home Issue - 8 years ago
some micro switches have normally open and normally closed connections as well as a common very easy to test limit switches by physically moving the axis by hand to mid travel then initiate a software home for that axis and as it moves press the limit switch and movement should stop otherwise it is a bad switch or incorrect firmware setting. Most limit switches are mechanical but could be opticalby Roger123D - Prusa i3 and variants
Re: heater decoupled mid print - 8 years ago
almost all intermittent heater (hot end) problems are caused by a thermistor that has a broken wire somewhere resulting in a 0 reading which terminates printing. They can be damaged by overheating above their operating range but this would be a constant failure and firmware protects against this. The best approach is to keep spare thermistors and simply change it.If it were the heater it would loby Roger123D - Prusa i3 and variants
Re: Motor flickering - 8 years ago
it may be possible the steppers are too weak to drive the load or the current needs adjustingby Roger123D - Reprappers
Re: Failure in arduino/ramps damaged laptop - 8 years ago
you can buy a usb isolator for this very purpose they are recommended for usb scopes and cost about $100 for the one I found at Link Instrumentsby Roger123D - General
Re: Repetier Firmware - 8 years ago
my mistake repetier is a firmware as well as a host they have a configuration tool on their web site to download the firmware and a separate configuration file for updates the site pretty much does it all for you the firmware configuration tool is the best betby Roger123D - Repetier
Re: Repetier Firmware - 8 years ago
we were all new once marlin is the firmware already installed a good thing but you also need Repetier the software that links the firmware (Marlin) to computer (Linux,Mac or Windows) and your slicing G code generator (Slic3r or eq) to the printer. When you install Repetier Host if has the slicer with it but is a separate program you can upgrade or change if desired. The Repetier reads the EEpromby Roger123D - Repetier