I have some direct and some Bowden printer setups. I love the Bowden speeds but not so much the filament control. I was wondering about adding a lightweight, weaker, direct drive to the Bowden setup to better manage retraction and reduce the linear advance, especially for more flexible filaments. I would keep the muscles on the Bowden extruder to do the heavy lifting. Gearing would need to be thby davies46 - Prusa i3 and variants
Hi, I've just put together an AM8 + IDEX, and am using a servo Z probe on T0. G29 only probes a small area in the low X and high Y quadrant. I'm using bilinear levelling, and both hotend can travel from 0 to 185 in X. X_PROBE_OFFSET_FROM_EXTRUDER is -19, so the probe can reach 0 to 166. To keep symmetry I'd expect it to probe the range 19 to 166, 147mm wide, and the 5 points should be (147/4) 3by davies46 - Firmware - Marlin
Sorry, had trouble finding my way back to this thread! It was a total screw-up on my part and was the actual mains supply to that power socket dropping out! Fixed the house and now the power control works a charm.by davies46 - Firmware - Marlin
I've selected POWER_SUPPLY 1 and enabled AUTO_POWER_CONTROL, taken 5v from RAMPS to SSR to ps_on, and it generally works fine... except partway through a print the PSU goes off for about 0.2s, which loses XY position. When I connect the SSR -ve direct to ground instead of ps_on it all works perfectly - minus the auto control. It's like the AUTO part briefly decides power isn't needed. The SSR aby davies46 - Firmware - Marlin
I can now answer my own question - it might help someone I finally got to swapping the two fans on the extender board (the hotend fans with the layer fans) and the corresponding pin definitions in Marlin. I tried this because the layer fans are PWM whilst the hotend fans aren't. Seems to have totally cured it. Perhaps it was something to do with PWM modes having to be the same over groups of pby davies46 - RAMPS Electronics
When I added a servo to my EEB configuration, the servo goes crazy when the layer fans come on. Modded A8 with RAMPS 1.4 and Marlin, with the following fan/servo pins configured: FAN_PIN 5 E0_AUTO_FAN_PIN 4 E1_AUTO_FAN_PIN 4 SERVO0_PIN 11 I made a dual extruder setup, changed Marlin to EEB and used a fan extender board in the servo header to run the hotend and layer fans. I added a servo for thby davies46 - RAMPS Electronics
Still trying to get to the bottom of this... Here's another image which shows it well. Granted it doesn't start off well, but after a while it seems to just lose the plot! Slic3r 1.2.9 did the chopping so I might try another program. I'm attaching the config bundle in case anyone's that interested -Philby davies46 - General Mendel Topics
I have a home-made Prusa 2 which has been printing fine for years. I recently dusted it off and since it was in an unknown state I reflashed it with the latest Marlin. The electronics is RAMPS 1.4 and all seems fine. I printed out thin wall and 50mm cube no problems (3mm ABS), but when I print larger pieces it starts getting very lumpy after around 12mm height. Specifically it shows on some wallby davies46 - General Mendel Topics