Servo Spindle motor encoder Mesa 7i76e

JohnnyCNC wrote: You could make that work. If it is geared 1:1 you can use the A/B/Z signals right from the encoder. On my mill I used the A/B signals that my spindle servo motor drive outputs and added a separate index signal to the spindle. This is because the spindle motor is geared 1:1.8. You will actually see two pickups for the index signal/ This is because the second one drives the a DRO that I also have on the mill.

Is that a 1kw motor? What kind of speed do you get out of that setup? I went with the 750w because it was the largest 5k rpm motor DMM had, figured I'd stick with the 2 step belt setup to get good torque upto 2500rpms and still be able to run upto 5k in high range. I really can't complain at all with this setup for this size mill, I haven't stalled the spindle yet.

Is that a 1kw motor? What kind of speed do you get out of that setup? I went with the 750w because it was the largest 5k rpm motor DMM had, figured I'd stick with the 2 step belt setup to get good torque upto 2500rpms and still be able to run upto 5k in high range. I really can't complain at all with this setup for this size mill, I haven't stalled the spindle yet.

It is the 1.8kw. Max motor speed is 3000 and I have it geared 1:1.8 for a 5400 rpm spindle speed. I have run it as slow as 150 rpm for some slit sawing. I saw another fellow that had his geared 1:2 for 6K top speed. I am getting good torque. The biggest endmill I use is 1/2 inch. I am able to do rigid tapping at 500 rpm. I could go faster but I don't need the extra excitement and drama. I have a second 24k water cooled spindle mounted on the mill for engraving and micro machining or anytime I want to do a lot of cutting with a 1/8 or smaller bit.

Yesterday i received a new encoder that i mounted directly (with timing belt) to the spindle.

Yumo COM-11102 Encoder 1024 P/R

Today i installed it and it works perfectly. one resolution is the same as the encoder counts. 1024

two issues.

#1 Spindle-at-speed. while it should be at the right rpm, spindle at speed signal keeps red. at a program it waits.

#2 the rpm is not perfectly stable. it changes somewhere between 990 and 1008 as far i can see while it should be 1000.

any suggestions?

Typically spindle at speed is driven by a "near" component
so has a settable tolerance (say +-10%)

Displayed speed will always have some variation, this variation is made worse
by the fact that is the calculated speed from the last millisecond. The flicker in the displayed speed is normally fixed by filtering it with the low pass filter
which averages the noise to give a more stable display

PCW wrote: Typically spindle at speed is driven by a "near" component
so has a settable tolerance (say +-10%)

Displayed speed will always have some variation, this variation is made worse
by the fact that is the calculated speed from the last millisecond. The flicker in the displayed speed is normally fixed by filtering it with the low pass filter
which averages the noise to give a more stable display

i got in my hal file near.0.scale 1.50 now, still no green light.
also near.0.difference value is 3.333333

Maybe i am missing something.

lowpass.spindle.gain is set to 1.50

correct me if im doing wrong.

Can you post you hal and ini files?