Joe replied to the topic LCD Axis Control increments = 4 times what they should me in the forum Troubleshooting – MPCNC 8 months ago
Each detent on the dial is actually 4 spots on the encoder. If you move the dial a little without letting it click to the next spot it will only move 10/1/.1. Mine does this but I haven’t fixed it in the firmware yet.
I had the exact same thing with my machine. I can cycle the z all day from estlcam/repetier/lcd screen, but if I run gcode to raise z faster than 200mm/m it skips. This is with nothing on the tool mount. Replacing the all-thread with a straighter piece helped some. I’ve ordered a piece of single start lead screw and a ridgid coupler to see if that…[Read more]
You can hook the PWM input on the controller up to the servo pins on the RAMPS. You’ll need to make some changes to marlin too. The link below has everything you’ll need.
Some of your z moves have a feed rate of 900. Listen/watch the stepper during one of these commands. It will probably buzz and not move instead of raising the z axis up. The next z move will drive it down further then it should be because it missed all of those steps. Also check if your pineapple coupler is tight.
I know a 400 watt spindle is the safe choice but I’m really curious how an 800 will handle. Below is some info I’ve gathered in case anyone else is interested.
– Slower acceleration in all directions. More importantly, slower deceleration which in my mind would cause loss of precision and resolution.
– Deflection of the gantry assembly on…[Read more]
I asked how much weight the z axis can handle last week and so far have not received any input.
I loaded around 9 lbs onto the tool mount and was able to cycle up and down with no problems. The driver and the stepper stayed pretty cool. I’m planning on ordering the 800 watt air-cooled…[Read more]
I replaced the threaded rod and added some teflon spray and now there are no more skipped steps. I can cycle the z-axis with the 5lb dumbbell and a couple cans of soup hanging in a plastic bag. I haven’t measured but there wasn’t a noticeable amount of deflection with close to 9 lbs on the tool mount. Think it’s safe to say using an 800 watt…[Read more]
So most of the binding was caused by the dumbbell getting caught on the xy pieces. I moved it and was able to cycle the z-axis all the way up and down with only a few trouble spots. I think the rest of it is due to the threaded rod being slightly bent. I’ll get a new piece and some dry teflon spray. I was able to run the Vicious logo g-code…[Read more]
I’m finishing up my build and trying to decide on what size spindle to buy, but I’m unsure of how big to go. I plan on going with a 400 watt brushless spindle but would prefer an 800 watt if possible. Is there a recommended max weight the z-axis can handle? I zip tied a 5lb dumbbell to the tool mount and x/y move just fine and z seems to do ok.…[Read more]