I have some trouble with my printer configuration…
I wanted to add a servomotor for the Z probe, and use it with the auto bed leveling.
The wiring is normally correct (servo to ground/5V/SSpin 53)
I have uploaded the firmware (https://github.com/magu/Marlin)
But no response of Repetier host when I send the commands:
M401 or 402, no even a echo
Same for the M280 P1 S90 - sometime I get a Servo 1 out of range (?), but most of the time, it’s no answer…
When I get the G29 command for the autobed leveling, it does the work, but without moving the servo…
// Support for a dedicated Z PROBE endstop separate from the Z MIN endstop.
// If you would like to use both a Z PROBE and a Z MIN endstop together or just a Z PROBE with a custom pin, uncomment #define Z_PROBE_ENDSTOP and read the instructions below.
// If you want to still use the Z min endstop for homing, disable Z_SAFE_HOMING above. Eg; to park the head outside the bed area when homing with G28.
// WARNING: The Z MIN endstop will need to set properly as it would without a Z PROBE to prevent head crashes and premature stopping during a print.
// To use a separate Z PROBE endstop, you must have a Z_PROBE_PIN defined in the pins.h file for your control board.
// If you are using a servo based Z PROBE, you will need to enable NUM_SERVOS, SERVO_ENDSTOPS and SERVO_ENDSTOPS_ANGLES in the R/C Servo below.
// RAMPS 1.3/1.4 boards may be able to use the 5V, Ground and the D32 pin in the Aux 4 section of the RAMPS board. Use 5V for powered sensors, otherwise connect to ground and D32
// for normally closed configuration and 5V and D32 for normally open configurations. Normally closed configuration is advised and assumed.
// The D32 pin in Aux 4 on RAMPS maps to the Arduino D32 pin. Z_PROBE_PIN is setting the pin to use on the Arduino. Since the D32 pin on the RAMPS maps to D32 on Arduino, this works.
// D32 is currently selected in the RAMPS 1.3/1.4 pin file. All other boards will need changes to the respective pins_XXXXX.h file.
// WARNING: Setting the wrong pin may have unexpected and potentially disastrous outcomes. Use with caution and do your homework.
Sponsored by TrinityLabs, Reworked by codexmas
**********************************************************************/
// Number of servos
//
// If you select a configuration below, this will receive a default value and does not need to be set manually
// set it manually if you have more servos than extruders and wish to manually control some
// leaving it undefined or defining as 0 will disable the servo subsystem
// If unsure, leave commented / disabled
// #define NUM_SERVOS 1 // Servo index starts with 0 for M280 command
// Servo Endstops
//
// This allows for servo actuated endstops, primary usage is for the Z Axis to eliminate calibration or bed height changes.
// Use M206 command to correct for switch height offset to actual nozzle height. Store that setting with M500.
// #define SERVO_ENDSTOPS {-1, -1, 0} // Servo index for X, Y, Z. Disable with -1 #define SERVO_ENDSTOP_ANGLES {0,0, 0,0, 116,30} // X,Y,Z Axis Extend and Retract angles
The wiring is normally correct (servo to ground/5V/SSpin 53)
Gilles[/quote]
Hy,
I’m interested in how did you connect the wires to the main board ? As I have 2 left hands, I don’t want to make mistakes and badly connect the wires…
I saw many HowTo about this topic, but poor Electronic explanations or pictures, there are only results and no making off.
Can you share a pic showing how you did the solders of the servo on the MB.
Tks in advance
I recently thought about a “servo driven” z endstop also.
I didn’t have the time yet to look at the LCD schematics, so:
Does anyone (probably Velleman) know if that is possible with the LCD controller attached?
Are there any PWM pins left to control the servo with the LCD connected?
[quote=“ichbinsnur”]I recently thought about a “servo driven” z endstop also.
I didn’t have the time yet to look at the LCD schematics, so:
Does anyone (probably Velleman) know if that is possible with the LCD controller attached?
Are there any PWM pins left to control the servo with the LCD connected?[/quote]
Normaly the SS pin is a free PWM pin, not used by the LCD.
I think it’s the case because I have seen k8200 working with the original board, with an LCD, and with a servo for the Z endstop.
[quote=“Barnabybear”]Hi, about half way through the second page of the post below ‘donboy’ details how to set the SS (pin53) to digital, in “Marlin_main.cpp” http://forum.velleman.eu/viewtopic.php?f=48&t=11194[/quote]
"[…]if you want to use your free SS Connector (PIN 53) in digital than in PWM- Mode,[…]
That proves that the SS pin (pin 53) is already in PWM mode no?
To connect a Servo, we need a PWM pin correct?
The problem was coming from the connector I used between the motherboard and the servo, I inverted 2 wires … Stupid mistake.
So now, everything is working properly
[quote=“aliengilles”]Finally succeed to make it work
If you want some question, I can help you here :-)[/quote]
Hi, having a nightmare trying to get this upgrade working. Have the servo installed and have worked out the retraction and extension angles, also got the offer for the Hotend/probe
Everytime I try a test print, after uploading and using M500 M501 the hot end hits he heated bed after using the G28 command
