CNC router axis running slowly

**JAZZCNC** · 03-03-2018

Ok then here's another way to set the steps per.

Go to the Settings Tab. Just above the Reset, there is a button which says "Set steps Per unit".
This will open a box where you select the axis to calibrate. It will then ask you to enter a Distance to move. Be careful here because if you enter a high number and your steps per is wrong then could travel into end of machine. So enter low munber first say 20mm.
The machine will move then it will ask you how far it moved. So measure the distance it actually moved It will then calculate the steps Per for you.

So mark each axis before doing this so can easily measure how far it moved. After done it ounce with a low number then do it again over a larger distance this gives you more accurate setting.
Obviously, you'll need to measure accurately else could be off. If your just fraction of a millimeter off then will have a big effect on the accuracy of the machine when cutting.

Also, change the acceleration to 300. 16.66 is way too low.

Edit: Also got to say this which you won't probably like hearing. The design of this machine is always going to struggle. The linear bearing setup and Chain drive are not ideal for CNC. You'll spend lot of time chasing issues with this machine.

**m_c** · 03-03-2018

Chain calculations are the same as rack and pinion.

Multiply the number of teeth on the sprocket, by the chain pitch, and it gives you distance per revolution of the sprocket.
Then dived the number of steps it takes to spin the sprocket one revolution, which for direct drive with a standard stepper motor is 200 times the microstep setting, by the distance.

So if you've got a 10t sprocket with a 1/2" pitch chain, it'll move 5" or 127mm per rev.
Paired to a standard stepper motor with 8 microstep setting, gives 1600 steps needed per rev.
So 1600/127 gives 12.594 steps per mm.