gwandad

Finally got it.Firstly got a friend to rewire the switches.No apparent change. Re read Homing & Limits for the Nth time, but finally noticed this para:- “Sets the jerk value used for homing to stop movement when switches are hit or released. You generally want this value to be larger than the $xJM value, as this determines how fast the axis will stop once it hits the switch. You generally want this as fast as you can get it without losing steps on the accelerations.”
Mine was XJM = 5000, XJH = 40… Changed XJH to 6000 & ditto for Y. Problem gone. With a low Home Jerk, it was driving through the stops. Effectively no brakes!!

Sorry Mate, I’ve really made a mess of this. New link https://www.dropbox.com/s/a0e1byha72tau2l/%24%24Dump2.pdf?dl=0
Switches are actually NC.
I am using CP & have gone through Homing and Limits Description and Operation for TinyG several times. I disable Y & Z, use G28.2 X0. If the spindle is placed about halfway & the command is executed, spindle moves slightly to the right, then accellerates to the left & crashes into the stop & switch. If I move it to the far side it will stop when it reaches max & goes into it’s expected latch/unlatch then stops OK. It just doesn’t recognise the switch. Same if I do the same on Y.
I had reached this same impasse last year before I got ill & convinced myself that it was the card. With a new TinyG, exactly the same!

Forgot to mention I followed https://www.synthetos.com/tinyg-homing-how-to/ through with no success.

I’ve been out of action for quite a while, but am getting back into it now.I have made some nice things, but there is one remaining issue & that is the home switches. I can’t get the TinyG to recognise them. I’ve gone though the Homing & Limits Github, & seem to have all the relevant settings. If I do a home on x for instance, it runs through the switch & rattles against the stop. If I set the Xmax to 300 (mm) & push the carriage to the far side, a home (28.2 X0) sends it back the 300mm OK, so it looks like a faulty switch, but it’s not. All 3 switches are new & test OK wwith a multimeter. The Y & Z act in the same manner. Any suggestions, please?

Firstly let me thank you. You have obviously done a lot of homework on my account. I really appreciate it!
You certainly cleared up some confusion. I think through following a video in open build completely lost track of the facts that I had a tiny G and not arduino and was expecting my results to be the same as theirs. Big mistake! I have now deleted all the G RBL programs. After setting cool term and TGF X as per your instructions. I can now execute $$ and get a dump. Unfortunately I have never used dropbox, so I will have to check into that as well. For the last time I will put the dump here. Sorry about that.

The movements I was getting from the machine were quite erratic and almost throwing the machine off the table. I changed the velocity maximum and feed rate maximum from 16,000 to 1600 in both cases. The speed now seems reasonable to my untrained eye. The movement distances were also very far out so I used a ruler to set the distances. Unscientific but it worked. Hopefully tomorrow get the wooden base into the machine and should be able to do some useful testing.
I’m still having some trouble with TGF X in that I can’t jog the individual motors.
I had a look at chilli pepper and J CNC but decided to leave those to look at in the future. I can’t get TGF X to execute commands either, so I have quite a bit to learn as it is!
fb] firmware build 435.10
[fv] firmware version 0.97
[hp] hardware platform 1.00
[hv] hardware version 8.00
[id] TinyG ID 2X2660-FNE
[ja] junction acceleration 2000000 mm
[ct] chordal tolerance 0.010 mm
[sl] soft limit enable 0
[st] switch type 1 [0=NO,1=NC]
[mt] motor idle timeout 2.00 Sec
[ej] enable json mode 0 [0=text,1=JSON]
[jv] json verbosity 3 [0=silent,1=footer,2=messages,3=configs,4=linenum,5=verbose]
[js] json serialize style 1 [0=relaxed,1=strict]
[tv] text verbosity 0 [0=silent,1=verbose]
[qv] queue report verbosity 0 [0=off,1=single,2=triple]
[sv] status report verbosity 1 [0=off,1=filtered,2=verbose]
[si] status interval 100 ms
[ec] expand LF to CRLF on TX 0 [0=off,1=on]
[ee] enable echo 0 [0=off,1=on]
[ex] enable flow control 2 [0=off,1=XON/XOFF, 2=RTS/CTS]
[baud] USB baud rate 5 [1=9600,2=19200,3=38400,4=57600,5=115200,6=230400]
[net] network mode 0 [0=master]
[gpl] default gcode plane 0 [0=G17,1=G18,2=G19]
[gun] default gcode units mode 1 [0=G20,1=G21]
[gco] default gcode coord system 1 [1-6 (G54-G59)]
[gpa] default gcode path control 2 [0=G61,1=G61.1,2=G64]
[gdi] default gcode distance mode 0 [0=G90,1=G91]
[1ma] m1 map to axis 0 [0=X,1=Y,2=Z…]
[1sa] m1 step angle 1.800 deg
[1tr] m1 travel per revolution 53.3400 mm
[1mi] m1 microsteps 8 [1,2,4,8]
[1po] m1 polarity 1 [0=normal,1=reverse]
[1pm] m1 power management 2 [0=disabled,1=always on,2=in cycle,3=when moving]
[2ma] m2 map to axis 1 [0=X,1=Y,2=Z…]
[2sa] m2 step angle 1.800 deg
[2tr] m2 travel per revolution 53.3400 mm
[2mi] m2 microsteps 8 [1,2,4,8]
[2po] m2 polarity 0 [0=normal,1=reverse]
[2pm] m2 power management 2 [0=disabled,1=always on,2=in cycle,3=when moving]
[3ma] m3 map to axis 1 [0=X,1=Y,2=Z…]
[3sa] m3 step angle 1.800 deg
[3tr] m3 travel per revolution 53.3400 mm
[3mi] m3 microsteps 8 [1,2,4,8]
[3po] m3 polarity 1 [0=normal,1=reverse]
[3pm] m3 power management 2 [0=disabled,1=always on,2=in cycle,3=when moving]
[4ma] m4 map to axis 2 [0=X,1=Y,2=Z…]
[4sa] m4 step angle 1.800 deg
[4tr] m4 travel per revolution 8.0000 mm
[4mi] m4 microsteps 8 [1,2,4,8]
[4po] m4 polarity 0 [0=normal,1=reverse]
[4pm] m4 power management 2 [0=disabled,1=always on,2=in cycle,3=when moving]
[xam] x axis mode 1 [standard]
[xvm] x velocity maximum 1600 mm/min
[xfr] x feedrate maximum 1600 mm/min
[xtn] x travel minimum 0.000 mm
[xtm] x travel maximum 220.000 mm
[xjm] x jerk maximum 5000 mm/min^3 * 1 million
[xjh] x jerk homing 10000 mm/min^3 * 1 million
[xjd] x junction deviation 0.0100 mm (larger is faster)
[xsn] x switch min 0 [0=off,1=homing,2=limit,3=limit+homing]
[xsx] x switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
[xsv] x search velocity 3000 mm/min
[xlv] x latch velocity 100 mm/min
[xlb] x latch backoff 20.000 mm
[xzb] x zero backoff 3.000 mm
[yam] y axis mode 1 [standard]
[yvm] y velocity maximum 1600 mm/min
[yfr] y feedrate maximum 1600 mm/min
[ytn] y travel minimum 0.000 mm
[ytm] y travel maximum 220.000 mm
[yjm] y jerk maximum 5000 mm/min^3 * 1 million
[yjh] y jerk homing 10000 mm/min^3 * 1 million
[yjd] y junction deviation 0.0100 mm (larger is faster)
[ysn] y switch min 0 [0=off,1=homing,2=limit,3=limit+homing]
[ysx] y switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
[ysv] y search velocity 3000 mm/min
[ylv] y latch velocity 100 mm/min
[ylb] y latch backoff 20.000 mm
[yzb] y zero backoff 3.000 mm
[zam] z axis mode 1 [standard]
[zvm] z velocity maximum 800 mm/min
[zfr] z feedrate maximum 800 mm/min
[ztn] z travel minimum 0.000 mm
[ztm] z travel maximum 100.000 mm
[zjm] z jerk maximum 50 mm/min^3 * 1 million
[zjh] z jerk homing 1000 mm/min^3 * 1 million
[zjd] z junction deviation 0.0100 mm (larger is faster)
[zsn] z switch min 0 [0=off,1=homing,2=limit,3=limit+homing]
[zsx] z switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
[zsv] z search velocity 800 mm/min
[zlv] z latch velocity 100 mm/min
[zlb] z latch backoff 20.000 mm
[zzb] z zero backoff 10.000 mm
[aam] a axis mode 1 [standard]
[avm] a velocity maximum 60000 deg/min
[afr] a feedrate maximum 48000 deg/min
[atn] a travel minimum 400.000 deg
[atm] a travel maximum -1.000 deg
[ajm] a jerk maximum 24000 deg/min^3 * 1 million
[ajh] a jerk homing 24000 deg/min^3 * 1 million
[ajd] a junction deviation 0.1000 deg (larger is faster)
[ara] a radius value 1.0000 deg
[asn] a switch min 1 [0=off,1=homing,2=limit,3=limit+homing]
[asx] a switch max 0 [0=off,1=homing,2=limit,3=limit+homing]
[asv] a search velocity 6000 deg/min
[alv] a latch velocity 1000 deg/min
[alb] a latch backoff 5.000 deg
[azb] a zero backoff 2.000 deg
[bam] b axis mode 0 [disabled]
[bvm] b velocity maximum 3600 deg/min
[bfr] b feedrate maximum 3600 deg/min
[btn] b travel minimum -1.000 deg
[btm] b travel maximum -1.000 deg
[bjm] b jerk maximum 20 deg/min^3 * 1 million
[bjd] b junction deviation 0.0100 deg (larger is faster)
[bra] b radius value 1.0000 deg
[cam] c axis mode 0 [disabled]
[cvm] c velocity maximum 3600 deg/min
[cfr] c feedrate maximum 3600 deg/min
[ctn] c travel minimum -1.000 deg
[ctm] c travel maximum -1.000 deg
[cjm] c jerk maximum 20 deg/min^3 * 1 million
[cjd] c junction deviation 0.0100 deg (larger is faster)
[cra] c radius value 1.0000 deg
[p1frq] pwm frequency 100 Hz
[p1csl] pwm cw speed lo 1000 RPM
[p1csh] pwm cw speed hi 2000 RPM
[p1cpl] pwm cw phase lo 0.125 [0..1]
[p1cph] pwm cw phase hi 0.200 [0..1]
[p1wsl] pwm ccw speed lo 1000 RPM
[p1wsh] pwm ccw speed hi 2000 RPM
[p1wpl] pwm ccw phase lo 0.125 [0..1]
[p1wph] pwm ccw phase hi 0.200 [0..1]
[p1pof] pwm phase off 0.100 [0..1]
[g54x] g54 x offset 0.000 mm
[g54y] g54 y offset 0.000 mm
[g54z] g54 z offset 0.000 mm
[g54a] g54 a offset 0.000 deg
[g54b] g54 b offset 0.000 deg
[g54c] g54 c offset 0.000 deg
[g55x] g55 x offset 110.000 mm
[g55y] g55 y offset 110.000 mm
[g55z] g55 z offset 0.000 mm
[g55a] g55 a offset 0.000 deg
[g55b] g55 b offset 0.000 deg
[g55c] g55 c offset 0.000 deg
[g56x] g56 x offset 110.000 mm
[g56y] g56 y offset 20.000 mm
[g56z] g56 z offset -10.000 mm
[g56a] g56 a offset 0.000 deg
[g56b] g56 b offset 0.000 deg
[g56c] g56 c offset 0.000 deg
[g57x] g57 x offset 0.000 mm
[g57y] g57 y offset 0.000 mm
[g57z] g57 z offset 0.000 mm
[g57a] g57 a offset 0.000 deg
[g57b] g57 b offset 0.000 deg
[g57c] g57 c offset 0.000 deg
[g58x] g58 x offset 0.000 mm
[g58y] g58 y offset 0.000 mm
[g58z] g58 z offset 0.000 mm
[g58a] g58 a offset 0.000 deg
[g58b] g58 b offset 0.000 deg
[g58c] g58 c offset 0.000 deg
[g59x] g59 x offset 0.000 mm
[g59y] g59 y offset 0.000 mm
[g59z] g59 z offset 0.000 mm
[g59a] g59 a offset 0.000 deg
[g59b] g59 b offset 0.000 deg
[g59c] g59 c offset 0.000 deg
[g92x] g92 x offset 0.000 mm
[g92y] g92 y offset 0.000 mm
[g92z] g92 z offset 0.000 mm
[g92a] g92 a offset 0.000 deg
[g92b] g92 b offset 0.000 deg
[g92c] g92 c offset 0.000 deg
[g28x] g28 x position 0.000 mm
[g28y] g28 y position 0.000 mm
[g28z] g28 z position 0.000 mm
[g28a] g28 a position 0.000 deg
[g28b] g28 b position 0.000 deg
[g28c] g28 c position 0.000 deg
[g30x] g30 x position 0.000 mm
[g30y] g30 y position 0.000 mm
[g30z] g30 z position 0.000 mm
[g30a] g30 a position 0.000 deg
[g30b] g30 b position 0.000 deg
[g30c] g30 c position 0.000 deg