Brother TC-211

andypugh wrote: Normally the brakes seem to be sprung "on" so that with no power the axis is locked, and it is actively unlocked when the motor is powered up and ready to use it.

That's standard. It's that way so that if power goes out, you don't have your head falling and crashing into the table. :ohmy:

Ok I'm a little lost again.

Here is my z axis hal


#*******************
# AXIS Z
#*******************

setp pid.z.Pgain [AXIS_2]P
setp pid.z.Igain [AXIS_2]I
setp pid.z.Dgain [AXIS_2]D
setp pid.z.bias [AXIS_2]BIAS
setp pid.z.FF0 [AXIS_2]FF0
setp pid.z.FF1 [AXIS_2]FF1
setp pid.z.FF2 [AXIS_2]FF2
setp pid.z.deadband [AXIS_2]DEADBAND
setp pid.z.maxoutput [AXIS_2]MAX_OUTPUT

net z-index-enable <=> pid.z.index-enable
net z-enable => pid.z.enable
net z-output => pid.z.output
net z-pos-cmd => pid.z.command
net z-vel-fb => pid.z.feedback-deriv
net z-pos-fb => pid.z.feedback

# ---PWM Generator signals/setup---

setp hm2_5i25.0.7i77.0.1.analogout0-scalemax [AXIS_2]OUTPUT_SCALE
setp hm2_5i25.0.7i77.0.1.analogout0-minlim [AXIS_2]OUTPUT_MIN_LIMIT
setp hm2_5i25.0.7i77.0.1.analogout0-maxlim [AXIS_2]OUTPUT_MAX_LIMIT

net z-output => hm2_5i25.0.7i77.0.1.analogout0
net z-pos-cmd axis.2.motor-pos-cmd
net z-enable axis.2.amp-enable-out

# ---Encoder feedback signals/setup---

setp hm2_5i25.0.encoder.00.counter-mode 0
setp hm2_5i25.0.encoder.00.filter 1
setp hm2_5i25.0.encoder.00.index-invert 0
setp hm2_5i25.0.encoder.00.index-mask 0
setp hm2_5i25.0.encoder.00.index-mask-invert 0
setp hm2_5i25.0.encoder.00.scale [AXIS_2]ENCODER_SCALE

net z-pos-fb <= hm2_5i25.0.encoder.00.position
net z-vel-fb <= hm2_5i25.0.encoder.00.velocity
net z-pos-fb => axis.2.motor-pos-fb
net z-index-enable axis.2.index-enable <=> hm2_5i25.0.encoder.00.index-enable
net z-pos-rawcounts <= hm2_5i25.0.encoder.00.rawcounts

# ---setup home / limit switch signals---

net home-z => axis.2.home-sw-in
net min-z => axis.2.neg-lim-sw-in
net max-z => axis.2.pos-lim-sw-in



And how it is wired off of the servo driver to the 7i77 board


CN8-10 A TB3-1
CN8-9 /A TB3-2
CN8-12 B TB3-4
CN8-11 /B TB3-5
CN8-17 Z TB3-7
CN8-13 /Z TB3-8

ANALOG VELOCITY COMMAND

CN8-1 AOUT TB5-4
CN8-2 GND TB5-3

DRIVE ENABLE

CN8-15 ENA+ TB5-2
CN8-16 ENA- TB5-1


So adding the line of code from before

net zenable hm2_5i25.0.7i77.0.output-03


output 3 would actualy be output 2 ?????

and where would I wire the relay connections to on the 7i77 board ????
Would that be tb8 pin 20 for output 3

I'm really lost here



Mesa pdf for 7i77


image missing http://i1357.photobucket.com/albums/q757/mblaszkiewicz/Screenshot-EWPD7i77manwpd_zpsca4966fc.png

yes output pin 3 is pin 20 on TB8 , the confusion is that the pins start at 0 and not 1
so yes it can be confusing at first

2 have 2 banks of inputs and outputs on tb8 and tb 7
the first 16 pins are inputs and the last 8 are outputs

so your relay ( 24v) would go from your 24v + to the 7i77 TB8 PIN 20
and that your field voltage is is 24v TB2 pin 1 and ground pin 8

mblaszkiewicz wrote: net z-enable => pid.z.enable

Firstly, in your HAL file the Z axis enable signal is called "z-enable" with a hyphen, so use that in any extra code you add.
Note that you can add the brake stuff in the custom.hal file if you want to leave the main HAL file as-generated.
All HAL files share the same "name space", ie the same pin names and signal names are available to all HAL files.

DRIVE ENABLE

CN8-15 ENA+ TB5-2
CN8-16 ENA- TB5-1

You could possibly connect the brake relay here, but then you don't get to add the timedelay, so it is probably better not to.

net zenable hm2_5i25.0.7i77.0.output-03
output 3 would actualy be output 2 ?????
and where would I wire the relay connections to on the 7i77 board ????
Would that be tb8 pin 20 for output 3

I chose output-03 _completely_ at random. You should use whichever output is convenient for you.

I got the pin naming convention a little bit wrong, now that I look around the web for examples.

If we stick with output 03, then according to the Mesa manual that is on TB8 pin 20.

I will get back to this later with a wiring schematic.

Diagram Attached

Thanks Andy the machine now has a brake on the Z axis.

Next thing on the list of to do. Anyone have any idea on how to orient the spindle.

The spindle is actually a very large servo and does have a resolver that outputs to encoder signals.
I beleive its wired the same way as the other axis's and I wired it that way into the 7i77 card.

Also the machine homes very slowly. Any ideas on that would be great also.