@ Sublime. Hey, I am new to the reprap, but i really admire your Tantillus 3D Printer, I just wanted to know how the calculations for Tantillus are done in terms of: How is the calculation is done like how fish wire is being used with Herringbone gears, what values are we dealing with? I am not sure what values to put in! 1) Steps per millimeter X and Y Steps = motor Steps per revolution x driver microstep ÷ belt pitch ÷ number of teeth on the pulley https://reprap.org/forum/read.php?279,217157,217157#msg-217157 Sun, 11 Oct 2026 16:14:33 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?279,217157,218112#msg-218112 https://reprap.org/forum/read.php?279,217157,218112#msg-218112 lajos Tantillus Thu, 13 Jun 2013 19:52:48 -0400 https://reprap.org/forum/read.php?279,217157,218072#msg-218072 https://reprap.org/forum/read.php?279,217157,218072#msg-218072 Sublime Tantillus Thu, 13 Jun 2013 16:50:51 -0400 https://reprap.org/forum/read.php?279,217157,218070#msg-218070 https://reprap.org/forum/read.php?279,217157,218070#msg-218070 here and change only these fields:

layer height: 0.25mm
nozzle: 0.4mm

The calculator gives me PLA temperature of 214C. Is that correct? Do you really print PLA that hot?]]> lajos Tantillus Thu, 13 Jun 2013 16:43:46 -0400 https://reprap.org/forum/read.php?279,217157,217259#msg-217259 https://reprap.org/forum/read.php?279,217157,217259#msg-217259 yonray Tantillus Mon, 10 Jun 2013 18:41:13 -0400 https://reprap.org/forum/read.php?279,217157,217181#msg-217181 https://reprap.org/forum/read.php?279,217157,217181#msg-217181
They should be.

1 / ((rod_diameter*3.14159) / (motor_steps*micro_stepping)) = steps_per_mm

But that does not work out correctly when measured. My theory on this is with the cable under tension it does not stretch much around the outside so instead the cable gets compressed on the inside. This makes the actual circumference some where inside the wraps of the cable.

So if the rods are 7.92mm like mine and 0.5mm cable and you end up with 122.5 steps per mm as measured and adjusted with a set of digital calipers attached to the carriage.

We find it works out as 8.315mm drive diameter.
1/((8.315*3.14159)/3200)

And if we figure backwards:
1 / (((rod_diameter+(cable_diameter*0.79))*3.14159) / (motor_steps*micro_stepping)) = steps_per_mm

It looks like the drive diameter is rod diameter plus 40% of the cable diameter on each side of the rod:

rod_diameter+((filament_diameter*0.4)+(filament_diameter*0.4))

But even at this if your rods are not 5/16" (7.92mm) I would measure the movements and readjust the steps per mm to move the carriage exactly the requested amount.]]> Sublime Tantillus Mon, 10 Jun 2013 14:44:19 -0400 https://reprap.org/forum/read.php?279,217157,217157#msg-217157 https://reprap.org/forum/read.php?279,217157,217157#msg-217157
How is the calculation is done like how fish wire is being used with Herringbone gears, what values are we dealing with? I am not sure what values to put in!

1) Steps per millimeter X and Y

Steps = motor Steps per revolution x driver microstep ÷ belt pitch ÷ number of teeth on the pulley]]> yonray Tantillus Mon, 10 Jun 2013 13:53:28 -0400