Hi there,
Today I managed to wire up 2 of my steppers and I have attached one to my machine (Sieg Super X1). I machined new bearing blocks with angular contact ball bearings and I'm using a toothed belt with 1:1 ratio. My control board is a Unipolar 4-axis Xylotex unit and the motors are rated at 254ozin at 2.5A and 4.5V. I'm using the standard acme leadscrews and the motors are running at 2.1A.
According to what TurboCNC is saying, I'm getting 1500mm/min max speed at 10000Hz, without losing any steps. How does this speed compare to other desktop mills? I can take it up to 12000Hz without losing steps, but the machine seems happier at 10000. At about 14000Hz, it starts to lose steps. I haven't played too much with the acceleration yet.
I was quite relieved to actually see these motors working. The y-axis, which is the axis that is connected up, is probably the heaviest axis (ie. needs the most force) , as the gibs need to be quite tight to keep the accuracy. I reckon that the x-axis will be capable of higher speeds than the y-axis.
I now have a few questions (since I've never used any stepper motors before).
Is it normal for the stepper motors to get hot? I ran it for about 10 minutes and after this time the motors were hot, but I could still hold them with my hands without getting uncomfortable.
Is it normal for a motor to get hot when plugged in, but not being used?
How hot should the driver chips get on the board? Mine were quite hot (hotter than the motors). The board is in a PC case and has got 1 fan blowing air in and basically 2 fans sucking air out (all normal 80mm 12V PC fans). The board isn't directly in the path of either of these fans. I'm thinking about getting another PC fan tomorrow that will be directed over the driver chips.
I can't wait to finish the rest of this machine and start making some useful things - like fancy, 3D paperweights!!! The x-axis should be running by the end of tonight and the Z should hopefully be done in the next week. Once the x-axis is done, I'll start off with some simple 2D shapes. Yippee!!!
Regards
Warren