Show all posts by user

Anyone know where to by PEEK tubing? - 12 years ago

I have access to a mill, and would be interested in experimenting with novel nozzle designs. Does anyone know if it's possible to buy J-Head equivalent PEEK tubing (in quantities <= 1m) or similar material? Cheers, MarkR

by MarkR - Reprappers

Re: Heated bed works with test code but not Marlin/Repetier - 12 years ago

SOLVED! Turns out it was a dodgy thermistor, thanks!

by MarkR - RAMPS Electronics

Heated bed works with test code but not Marlin/Repetier - 12 years ago

So the problem's not with the bed, and most likely not with RAMPS 1.4, is there some sort of firmware tweak?

by MarkR - RAMPS Electronics

Re: Heat Bed no longer functions RAMPS 1.4 - 12 years ago

Have you tried the RAMPS 1.4 test code? When I upload that the bed heats up, just not with marlin :/

by MarkR - RAMPS Electronics

Re: My J-Head may be blocked? - 12 years ago

Taking the hotend apart as much as you can, putting the whole thing in the oven (minus electronics!) and then poking the softened plastic through with allan keys often does the trick. If there's a tiny piece of debris inside the metal tip of the hot end, again soften whatever's there in the oven. What I've found works best for poking through the .35mm orifice is the end of a guitar string - they

by MarkR - Australia, Melbourne RUG

Re: Extruder randomly changes polarity - 12 years ago

Sorry I should have been more clear. It alternates consistently when clicking "extrude", as in click once it rolls clockwise, click twice anticw, but when printing it appears to move randomly, though I'm sure there's some twisted logic beneath it all.

by MarkR - Reprappers

Extruder randomly changes polarity - 12 years ago

Hi there, My Prusa i3 is running pretty nicely now thanks to the great people of this forum. However, I've got a weird problem with the extruder motor - each time I click extrude in Pronterface, the extruder motor changes direction. Any ideas why? MarkR

by MarkR - Reprappers

Re: Stepper driver only works if i touch it?! - 12 years ago

You got it ShadowRam Tiny solder retouch and it works a treat, thanks!

by MarkR - RAMPS Electronics

Stepper driver only works if i touch it?! - 12 years ago

Hi all, I've fine tuned the currents on the trim pots and still have this peculiar problem. The x-axis only moves when I touch the A4988 driver around the processing chip. Originally I thought this may be a heating issue, where my finger was required to absorb the excess heat, but now I've realised the solution is not touching the chip itself, but the pins around MS1-3, touching them seems to per

by MarkR - RAMPS Electronics

Axes only move in small increments - 12 years ago

Dear Reprap Gurus, I'm working on my i3 build and have come across this strange problem. In Pronterface or Repetier host I can move the axes up and down by 0.1 without any difficulty, but when I try a larger distance (eg. 1) the motors whistle but no movement occurs. They move successfully over larger distances with the test firmware running. This problem isn't fixable by adjusting the trim pot o

by MarkR - Reprappers

Re: Activating PSU kills serial connection??! - 12 years ago

Thanks for the feedback! I inspected the arduino and there's a little chip next to the USB port that looked fried. Replaced the board and now it all works fine!

by MarkR - RAMPS Electronics

Activating PSU kills serial connection??! - 12 years ago

Dear RAMPS gurus, I've got my Prusa i3 set up with RAMPS 1.4, test firmware works Ok all the motors and heaters are fine. But when I connect to Pronterface or Repetier host it only connects when the PSU is switched off. I can connect, read from the SD and even start a print, but as soon as I fire up the PSU the connection to my laptop dies. Same thing happens in the Arduino IDE, any ideas why thi

by MarkR - RAMPS Electronics