Denford Microrouter V4

[andy_con]

with the help of a friend the v4 board is now connected and motor is spinning

but im having a new dro issues in mach.

motors are 200 steps / revDirect drive, no gearing.Lea
dscrew is 3mm pitch (1 rotation moves 3mm) waiting to get exact pitch from denford forum
Microstepping is 1/10 (stepper drivers are set to 10)
so:No. of steps per mm is = 200 * 10 * (1/3) = 667

but when I put 667 into steps per in mach the actual machine moves 550mm but I only get a reading of about 26 on the dro

[m_c]

Your maths seems good.
What do you mean you only get a reading of 26?
What are you actually commanding?
And do you really mean 550mm?

[andy_con]

Your maths seems good.
What do you mean you only get a reading of 26?
What are you actually commanding?
And do you really mean 550mm?

if I use the arrow keys on the keyboard to jog the x axis for example. I travel the whole length of the machine which is 550mm as stated in the denford manual but the dro readout in mach only say 128

so something isn't right

[m_c]

So it's out by a factor of 4.something.

Are you sure the microstepping is 10?
Easy way to check, is if you mark a motor pulley/screw, then request a move of 3mm, it should rotate one full turn. If it doesn't, then you need to work out why.

[andy_con]

[lucan07]

run the auto configuration on the X,Y & Z axis on the settings tab bottom left above reset

[andy_con]

run the auto configuration on the X,Y & Z axis on the settings tab bottom left above reset

im using machstdmill ive no idea how to get it back to normal mach screen set

[m_c]

I seem to have a recollection of certain drives having the switches the wrong way around, but if that was the case, you'd be out by a far larger factor.
Run the test like I said, and you'll know for sure if it's the microstep setting causing the numbers to be wrong or not.

I think you should be able to swap back to the standard screen by simply selecting the standard screen, however I've never used MSM. Regardless, I prefer to calculate the steps manually, as that way I know if something isn't set how it should be, or I've got a number wrong somewhere.

[lucan07]

If you run machloader create a copy of your setup its a good idea to have a standard screen setup to troubleshoot, and you could run autotune.

Are you sure not mixing Motor tuning and mach default mm's and inches 26x25.4 = 660 would only be 20% out closer than 400%.