Remora - ethernet NVEM / EC300 / EC500 cnc board

DarkPhoinix wrote:

is there a way to download previously uploaded nvem-rt1052.txt from NVEM?

 
Unfortunately, no. It's a one way process.

Spyderbreath wrote:

Warning: Spoiler!

At the risk of the blind leading the blind, to me that is not quite the right question. That chart is for your micro-stepping. Like the 800 is 4 microsteps, if you're using a 1.8 deg. stepper. I have always looked at it this way - What are you doing with the motor? If your opening a door or driving a ram, picking 800 would be fine, but using that on a belt or lead screw may very well end up leaving artifacts in the work due to the rougher movement between points. The downside is the more micro-steps you have the more torque you lose. 3200 (16 micro-steps) seams to be a reasonable middle ground that most use as standard. The controller will put out as many steps as directed by LinuxCNC to make a revolution, just a matter of how fast it can do it.

Whatever you chose, that gets figured out when you tell LinuxCNC in your .ini file how many pulses it takes to move one unit. That is set with the SCALE on each axis. Like for me, I have 16 micro-steps (3200) and a 5mm pitch screw, which works out to SCALE = 640 or -640 depending which way you need the motor to move.

scotta wrote:

Warning: Spoiler!

DarkPhoinix post=328735 userid=35952 is there a way to download previously uploaded nvem-rt1052.txt from NVEM?   Unfortunately, no. It's a one way process.

scotta wrote:

I'd always recommend calculating the joint SCALE based on the hardware. ie steps per revolution of the stepper motor and then the leadscrew pitch etc. If the actual movement achieved is not correct I'd be suspicious of lost steps, especially if micro stepping.