Threading on emco compact 5 lathe

[welderfabrod]

Can anyone help with this.
I retrofitted an Emco compact 5 lathe a couple of years ago but did'nt set it up for thread cutting, 1) because I had another emco 5 which I could thread cut on but this has now bit the dust and will be retrofitted in the future and 2) I was'nt sure how to do it. So what do I need to do to achieve this.

The lathe has been fitted with modern 1.8deg stepper motors and Camtronics 3 axis board, because I had it and it works fine on this small lathe. I retained the Emco motor speed controller so the encoder disc on the spindle is still in use but the index slot is not used at the moment. I do,nt find switching the motor on and off manualy a problem so I am not worried about controling this with emc2. But what do I need to do to syncronize the steppers with the spindle speed, and what do I need to add to the Hal file. The encoder disc has one index slot and I think one hundred slots for speed contol.
Any help here would greatly appreciated

Rod

[samco]

This guy did a 5 conversion
http://lerneaenhydra.net/compact5/

You are going to need the index pulse hooked to emc for threading to work. If you also hook the encoder line up (I am pretty sure lerneaen did the same thing) (100 holes?) you will get more acurite threads. Look at his hal files.

sam

[welderfabrod]

Thanks for that Sam have downloaded files but my linux box is in the workshop and not connected to the internet so need to transfer files out there to open them. But will have to wait till tomorrow now as I'm on night shift.

Rod

[welderfabrod]

Sam I've been messing around with these files (mainly the controlbox hal file because this contains the threading info I need) but can't get it working. There are some differences in my set up i.e he is using the Emco drivers still, he has also fitted a relay to turn the spindle on and off (I think connected to pin 4 of the parallel port) and a jog wheel box (which I think uses a second port) whereas all I have left is the Emco speed controller and switching the spindle manually. But the problem at the moment is I can't get the hal file to load. All I have done really is to copy his threading part of the file as I do'nt need the rest at this time but EMC stops loading and presents its failure window. In the debug section it has two errors
1) "Blocks is deprecated, use subcomponents generated by comp instead". this obviously refers to the line loadrt blocks not=1 at the beginning of the threading section.
2) HAL: ERROR: Pin motion.spindle.sync not found.
3) Custom hal:42 Link failed (I think the 42 refers to line 42 in my file) in his file I think it refers the line linkps motion.spindle-sync => spindle-sync in the #encoder reset control section.

The other bit I dont understand is the #set pullup pin high section, pin 1 on the parrallel port which seems to be configured as output but what is it connected to and what is its purpose.

I have'nt used hal to this extent before so I would be really grateful if yourself or someone else on the forum could help me here.

Thanks in advance.

Rod

[chester88]

This might help. from the online manual for EMC 2.3:
http://www.linuxcnc.org/docs/devel/h...s_spindle.html

[welderfabrod]

Thanks chester. It has also been pointed out to me on the EMC forum that the file is also quite old and if I have a later version of EMC2 it probably won't work. So I'm going to have another go this morning.

Thanks again Rod.

[welderfabrod]

Hi again all I'm still not having much luck with this. I have had a go with HalScope and I am getting both index and the count pulses (spindle-index) and (spindle-phase-a) on the scope and when I vary the revs the pulses vary in frequency on the scope, but when I try to do a G33 in MDI mode I get the "Spindle not turning in G33" error. The encoder is connected to Pin 10 (spindle-phase-a) and pin 11 (spindle-index) on the port. This was configured using the Stepconf Wizard so I would have thought this should be OK.

I really do need some help with this.

Thanks Rod.

[chester88]

Can you please post your HAL files.
You said you tried threading in MDI have you tried a thread in auto mode?

[samco]

posting your hal file would help as chester said. You need to hook up a bunch of things - here is from the nist lathe setup

This is using counter - which is depreciated. (also linksp/linkps) net should be used. It should work as is but you really should use encoder and net instead. (you can put the encoder into 'count' mode to read a single channel encoder like you have. (single channel + index).

# counting the spindle counter in software loadrt counter num_chan=1 ####################################################### # Beginning of threading-related stuff ####################################################### # spindle counter # connect encoder signals to counter counter # B is not used because it is the counter module, not encoder newsig spindle-phase-A bit newsig spindle-phase-B bit newsig spindle-phase-Z bit linksp spindle-phase-A => counter.0.phase-A linksp spindle-phase-Z => counter.0.phase-Z linkps parport.0.pin-11-in => spindle-phase-A linkps parport.0.pin-12-in => spindle-phase-B linkps parport.0.pin-13-in => spindle-phase-Z # (that way thread pitches can be straightforward, # a 20 tpi thread would multiply the counter output # by 1/20, etc) setp counter.0.position-scale 1024 # hook up motion controller's spindle indexing pin newsig spindle-index-enable bit linkps motion.spindle-index-enable <=> spindle-index-enable linksp spindle-index-enable <=> counter.0.index-enable # report our revolution count to the motion controller newsig spindle-pos float linkps counter.0.position => spindle-pos linksp spindle-pos => motion.spindle-revs

[welderfabrod]

Thanks for the response guy's I have'nt as yet tried it in auto mode but I will have a go and see if it works. I thought a G33 would be easiest in MDI as it is a simple sycronized motion.

I am starting the spindle manually also speed control is manual.
My hal file is below I did this again on Sunday.




# Generated by stepconf at Sun Jun 7 11:35:48 2009
# If you make changes to this file, they will be
# overwritten when you run stepconf again
loadrt trivkins
loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD servo_period_nsec=[EMCMOT]SERVO_PERIOD traj_period_nsec=[EMCMOT]SERVO_PERIOD key=[EMCMOT]SHMEM_KEY num_joints=[TRAJ]AXES
loadrt probe_parport
loadrt hal_parport cfg=0x378
setp parport.0.reset-time 500
loadrt stepgen step_type=0,0
loadrt encoder num_chan=1

addf parport.0.read base-thread
addf stepgen.make-pulses base-thread
addf encoder.update-counters base-thread
addf parport.0.write base-thread
addf parport.0.reset base-thread

addf stepgen.capture-position servo-thread
addf encoder.capture-position servo-thread
addf motion-command-handler servo-thread
addf motion-controller servo-thread
addf stepgen.update-freq servo-thread

setp encoder.0.position-scale 100
setp encoder.0.counter-mode 1
net spindle-position encoder.0.position => motion.spindle-revs
net spindle-velocity encoder.0.velocity => motion.spindle-speed-in
net spindle-index-enable encoder.0.index-enable <=> motion.spindle-index-enable
net spindle-phase-a encoder.0.phase-A
net spindle-phase-b encoder.0.phase-B
net spindle-phase-index encoder.0.phase-Z

net xstep => parport.0.pin-02-out
setp parport.0.pin-02-out-reset 1
net xdir => parport.0.pin-03-out
net zstep => parport.0.pin-06-out
setp parport.0.pin-06-out-reset 1
net zdir => parport.0.pin-07-out
net xenable => parport.0.pin-17-out

net spindle-phase-a <= parport.0.pin-10-in
net spindle-index <= parport.0.pin-11-in

setp stepgen.0.position-scale [AXIS_0]SCALE
setp stepgen.0.steplen 1
setp stepgen.0.stepspace 0
setp stepgen.0.dirhold 19000
setp stepgen.0.dirsetup 16000
setp stepgen.0.maxaccel [AXIS_0]STEPGEN_MAXACCEL
net xpos-cmd axis.0.motor-pos-cmd => stepgen.0.position-cmd
net xpos-fb stepgen.0.position-fb => axis.0.motor-pos-fb
net xstep <= stepgen.0.step
net xdir <= stepgen.0.dir
net xenable axis.0.amp-enable-out => stepgen.0.enable

setp stepgen.1.position-scale [AXIS_2]SCALE
setp stepgen.1.steplen 1
setp stepgen.1.stepspace 0
setp stepgen.1.dirhold 19000
setp stepgen.1.dirsetup 16000
setp stepgen.1.maxaccel [AXIS_2]STEPGEN_MAXACCEL
net zpos-cmd axis.2.motor-pos-cmd => stepgen.1.position-cmd
net zpos-fb stepgen.1.position-fb => axis.2.motor-pos-fb
net zstep <= stepgen.1.step
net zdir <= stepgen.1.dir
net zenable axis.2.amp-enable-out => stepgen.1.enable

net estop-out <= iocontrol.0.user-enable-out
net estop-out => iocontrol.0.emc-enable-in

loadusr -W hal_manualtoolchange
net tool-change iocontrol.0.tool-change => hal_manualtoolchange.change
net tool-changed iocontrol.0.tool-changed <= hal_manualtoolchange.changed
net tool-number iocontrol.0.tool-prep-number => hal_manualtoolchange.number
net tool-prepare-loopback iocontrol.0.tool-prepare => iocontrol.0.tool-prepared

[acondit]

Rod,

Here is my spindle encoder setup. I have a 100 count encoder with Channel A and Index (channel Z) hooked up. I am using pin 15 for the index and pin 13 for channel A.

#############################################################
#Spindle Sensor
#############################################################
# load encoder stuff
loadrt encoder num_chan=1
loadrt scale count=1
loadrt lowpass count=1
# counter mode
setp encoder.0.counter-mode 1
# 100 counts per encoder rev
setp encoder.0.position-scale 100

# encoder reset control
# hook up motion controller's sync output
net spindle-index-enable motion.spindle-index-enable <=> encoder.0.index-enable

# hook up spindle encoder
net spindle-index parport.0.pin-15-in encoder.0.phase-Z
net SpindleEncoderA parport.0.pin-13-in encoder.0.phase-A
#net SpindleEncoderB parport.0.pin-12-in encoder.0.phase-B

# spindle speed
net spindle-pos encoder.0.position => motion.spindle-revs
net spindle-spd-rps encoder.0.velocity scale.0.in motion.spindle-speed-in
net spindle-spd-rpm scale.0.out lowpass.0.in
setp scale.0.gain 60
net spindle-spd-rpm-filt lowpass.0.out
setp lowpass.0.gain 0.01

# count spindle encoder pulses
addf encoder.update-counters base-thread
addf encoder.capture-position servo-thread
addf lowpass.0 servo-thread
addf scale.0 servo-thread

Alan

[chester88]

Hey Rod :
you say you start the spindle manually but do you start the spindle in emc with a m code or in manual mode. EMC may require that it has been told to turn on the spindle even if you are really doing it your self. ( easy to try even if I am wrong)

Chris