Scara Setup
-
David I only have one hybrid stepper hooked up to the expansion connector for testing on E2. I'm trying to get this to work before I wire up the rest.
E2 X hybrid stepper
E3 Y hybrid stepper
E4 Z hybrid stepper
E5 Extruder hybrid stepper -
hybrid stepper hook up pic.
-
Your M584 command is this:
M584 X2 Y3 Z4 E5 ;Set drive mapping
So you currently have the extruder motor assigned to driver 5 (labelled E2 on the expansion board). Is that what you intended?
To get that extruder driver working, there are a few things you will need to do:
1. Select a tool that uses extruder drive 0.
2. Either heat up the associated heater, or send M302 P1 to enable cold extrusion.
3. Depending on your external driver, you may need to use a M569 command to extend the set pulse timing and/or invert the enable signal, like this:M569 P5 R1 T2
R1 will invert the enable signal to make it active high (the default is R0 which means active low), and T2 extends the step pulse width and minimum interval to 2us.
-
David here is what I'm trying to do, there is no Tool because this will be a clay printer so there's no hot end just one extruder
Please check my external driver configuration. I still have not been able to get E2 motor to turn ,although if I change the engage parameter I do see this on the motor. Also I've tried T2 and T4 and have tried engage signal in both positions .
Now that I've spent a fair bit of time on the interface I can really say it is fantastic. I'm used to smoothieware and this is so much easier and well laid out. Good job
E2 X hybrid stepper
E3 Y hybrid stepper
E4 Z hybrid stepper
E5 Extruder hybrid stepperM584 X5 Y6 Z7 E8 ;Set drive mapping
; Axis and motor configuration
M569 P5 S0 R0 T4 ; Drive 0 goes forwards X
M569 P6 S0 R0 ; Drive 1 goes forwards Y
M569 P7 S0 R0 ; Drive 2 goes forwards Z
M569 P8 S0 R0 ; Drive 3 goes forwards E -
Thanks for the compliment!
You have to define and select a tool to use an extruder. You can define a tool with no heater, like this:
M563 D0M563 P0 D0 -
Okay I understand about selecting extruder as tool, and I inserted M563 D0
However I am only testing a single motor on E2.
So far I am unable to get this motor to function, although it is responding to the enable signal. -
I'm sorry, that should have been:
M563 P0 D0
i.e. define tool 0 as using extruder drive 0 (which will correspond to the first E driver number in your M584 command). Then you need to select that tool by sending T0. After that, you should be able to extrude.
-
I guess I'm a little confused because I'm trying to assign E2 as X. This is where I have my test motor hooked ,it doesn't pertain to the extruder.
I have the end switchs turned off and no hotend so is there something else holding back the signals on E2?
-
To test the X motor by itself, send G91 first, then send G1 S2 X commands. For example, G1 S2 X10 should move the proximal (X) joint anticlockwise by 10 degrees, and G1 S2 X-10 should move it clockwise by 10 degrees. The first time you send one of these G1 S2 X commands, the motor should be energised, if you have the Enable polarity right.
-
Okay got it working thanks. Will be setting up and calibrating
-
Is there any easy way to use these proximity switches?
On my smoothieboard it's easy to switch from 3.3v to 5 volts for the end stop switches. These will operate on 5v even though they State 6 volts minimum -
Is there any easy way to use these proximity switches. On my smoothieboard it's easy to switch from 3.3v to 5 volts for the end stop switches. These will operate on 5v even though they State 6 volts minimum
-
The endstop connectors are 3.3V. You can get 5V power from the expansion connector or the PanelDue connector to power 5V endstops. If they are NPN output sensors, you can connect the output directly to the endstop input pin. With 12V or 24V sensors I recommend connecting a diode in between to protect the endstop input in the event of loss of the ground wire, but that isn't really necessary with 5V endstops.
Personally, I would just use microswitches. They may even be more reproducible than inductive sensors, which can be a little temperature-sensitive.
-
David
I have proximal and distal homing working, but I don't want to use a probe for Z homing.
I'd like the Z to go all the way to the top and hit limit switch for homing.
I have set Z height 200mm; File homez.g
G91 ; relative movement
G1 S2 Z4 F200 ; raise head 4mm to ensure it is above the Z probe trigger height
G90 ; back to absolute mode
G1 X100 Y100 F2000 ; put head over the centre of the bed, or wherever you want to probe
G30 ; lower head, stop when probe triggered and set Z to trigger height -
-
David I couldn't use that homing sequence, so I put together something from the Delta homing Z sequence. Remember the limit switch is at the top and I will be printing on the top of the desk which is 200 mm down.
thanks for the help -
I've initially got it working!!
So here is the homez.g
G91 ; use relative positioning
G1 S1 Z300 F2500 ; move all carriages up 300mm, stopping at the endstops
G1 S2 Z-5 ; move all towers down 5mm
G1 S1 Z8 F500 ; move towers slowly up 8mm, stopping at the endstops
G1 S2 Z-5 F10000 ; move carriages down 5mm
G90 ; back to absolute positioningBut now that I've got it working I'd like to put the limit switch at the bottom of the travel on the Z, so I'll be homing at the lowest point.
I hope this doesn't sound confusing but Z0 will then be all the way at the top, and usable Z is 200 mm.
This is hard to describe but I will be printing on the top of the distal arm, there will be a plastic dish which I will be extruding clay onto. As the Z descendants the object will continue to print. The clay extruder is stationary above the
machine,
I know this sounds crazy but I've done it before with a Delta and it works fine.So if you can please help with the Z homing sequence, and also I don't need thermistor so how can we block the lack of these from interfering.
Thanks; SCARA MINI
M111 S0 ; Debug off
M550 SCARA MINI ; Machine name and Netbios name (can be anything you like)
M551 Preprap ; Machine password (used for FTP)
;*** If you have more than one Duet on your network, they must all have different MAC addresses, so change the last digits
M540 P0xBE:0xEF:0xDE:0xAD:0xFE:0xED ; MAC Address;*** Networking
M552 S1 ; Turn network on;*** Ethernet networking: Adjust the IP address and gateway in the following 2 lines to suit your network
M552 P192.168.1.14 ; (0 = DHCP)
M554 P192.168.1.255 ; Gateway
M553 P255.255.255.0 ; NetmaskM555 P2 ; Set output to look like Marlin
G21 ; Work in millimetres
G90 ; Send absolute coordinates…
M83 ; ...but relative extruder moves; Disable Fan 1 thermostatic mode
M106 P1 H-1
M584 X5 Y6 Z7 E8 ;Set drive mapping
; Axis and motor configuration
M569 P5 S0 R0 T4 ; Drive 0 goes forwards X
M569 P6 S0 R0 T4 ; Drive 1 goes forwards Y
M569 P7 S0 R0 T4 ; Drive 2 goes forwards Z
M569 P8 S0 R0 T4 ; Drive 3 goes forwards E
; Drive 4 goes forwards
M669 K4 P200 D200 A-179:170 B-120:120 C0:0:0 ; set SCARA mode and parameters;Endstop configuration
M574 X1 Y2 Z1 S0 ; M574 X2 Y2 Z2 S1set endstop configuration (all endstops at high end, active high)
;*** The homed height is deliberately set too high in the following - you will adjust it during calibrationM666 X0 Y0 Z0
M208 S1 X50 Y-121 Z-1 ; Axis minima
M208 X179 Y121 Z100 ; Axis maxima ; put your endstop adjustments here, or let auto calibration find them
M350 X1 Y1 Z1 E1 E2 I1 ; Set 1x microstepping with interpolation
M92 X25.9820 Y17.777 ; Steps/degree for proximal and distal joints
M92 Z500 E106 ; Steps/mm for Z and E
M906 X1000 Y1000 Z1000 E800 I60 ; Set motor currents (mA) and increase idle current to 60%
M201 X1000 Y1000 Z1000 E1000 ; Accelerations (mm/s^2)
M203 X2000 Y2000 Z2000 E3600 ; Maximum speeds (mm/min)
M566 X1200 Y1200 Z1200 E1200 ; Maximum instant speed changes mm/minute; Thermistors
;M305 P0 T100000 B3950 R4700 H30 L0 ; Put your own H and/or L values here to set the bed thermistor ADC correction
;M305 P1 T100000 B3974 R4700 H30 L0 ; Put your own H and/or L values here to set first nozzle thermistor ADC correction
;M305 P2 T100000 B3974 R4700 H30 L0 ; Put your own H and/or L values here to set 2nd nozzle thermistor ADC correction; Tool definitions
M563 P2 D0
G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R00 S00 ; Set initial tool 0 active and standby temperatures to 0CM92 E663:663 ; Set extruder steps per mm
;*** If you are using axis compensation, put the figures in the following command
;M556 S78 X0 Y0 Z0 ; Axis compensation hereM208 S1 Z-0.2 ; set minimum Z
;T0 ; select first hot end
; Pressure advance
;M572 D0 S0.5; Misc
M83
M117 Use https://configurator.reprapfirmware.org/ to set up your printer config
M302 P1
M563 P0 D0 T1 ;enable cold extrusion.
T0; Heaters
;M143 H1 S260 ; Maximum heater temperature
M140 H-1 ; No bed heater
;M305 P1 T100000 B4138 C0 R4700 ; Thermistor parameters for heater 1
;M307 H1 A577.0 C199.0 D9.8 S1.00 B0 -
David did you see my last post? I actually have most everything working !
Now I'm going to work on the Z homing and run some accuracy tests -
I missed your previous post. I'm glad to hear that it's all working.
-
I have the limit switch at the bottom of the travel on the Z, so I'll be homing at the lowest point. The homing sequence works, but then Z should go up 200 mm to Z 0 to begin printing.
G91 ; use relative positioning
G1 S1 Z-100 F500 ; move all carriages up 300mm, stopping at the endstops
G1 S2 Z5 ; move all towers down 5mm
G1 S1 Z-8 F500 ; move towers slowly up 8mm, stopping at the endstops
G1 S2 Z5 F250 ; move carriages down 5mm
G90 ; back to absolute positioningI hope this doesn't sound confusing but Z0 will then be all the way at the top, and usable Z is 200 mm.
This is hard to describe but I will be printing on the top of the distal arm, there will be a plastic dish which I will be extruding clay onto. As the Z descendants the object will continue to print. The clay extruder is stationary above the
machine,
I know this sounds crazy but I've done it before with a Delta and it works fine.So if you can please help with the Z homing sequence and to get to Z0 at the top .
