Difference between revisions of "Plasma CNC"
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I have successfully driven one of the motors using a basic arduino sketch to send pulse and dir signals. Setting the signals high +5 volts with a common ground did not work. The datasheet for HSS86 shows a common 5v with a on signal represented as pin output low. This requirement means that GRBL is not working and need to configure GRBL to invert the high/low signals. | I have successfully driven one of the motors using a basic arduino sketch to send pulse and dir signals. Setting the signals high +5 volts with a common ground did not work. The datasheet for HSS86 shows a common 5v with a on signal represented as pin output low. This requirement means that GRBL is not working and need to configure GRBL to invert the high/low signals. | ||
| + | |||
| + | == Progress == | ||
| + | '''20-09-2020''' | ||
| + | |||
| + | '''12-09-2020''' | ||
| + | The datasheet for the HSS86 shows that all the +5v pins should be connected and the signal pins pulled low. | ||
| + | |||
| + | '''09-09-2020''' | ||
| + | The plan is to feed the HSS86 driver with the same signals as standard stepper motors. This is to send +5v to the STEP, DIR and ENABLE pins and have all the grounds connected together. I GRBL to send the pulses with universal gcode sender. After a few hours of fiddling nothing worked. | ||
Revision as of 11:59, 21 September 2020
Contents
Summary
Build a large sized XY CNC table capable of using a plasma torch to accurately cut metal.
- Project lead: Toby
- Team:
- Location: Metalspace
- Status: Design phase
Help wanted: electronics, cad, frame
Equipment
- 2x Y-axis 2m Rollon ELM65 enclosed linear rail
- 1x X-axis Rollon ROBOT130 X gantry
- 2x Servo motors 86HSE8N-BC38
- 2x HSS86 servo motor drivers
- 2x planetary gearboxes
- A crappy steel frame
The Rollon rails are very high quality industrial components that are sealed to dust. The Y axis rails use toothed belts inside the rail and the X axis used ball screws and twin linear rails. The motors are large high powered units with encoders that measure the actual movement and sends it back to the driver. This closed loop setup means that the driver can compensate for any missed step allowing for finer microstepping and increased reliability.
Software
Looking at the HSS86 datasheet it appear to work just like standard polou steppers that take a ENABLE, DIR & STEP signal input. Therefore a GRBL based controller should be ideal for driving the CNC.
I have successfully driven one of the motors using a basic arduino sketch to send pulse and dir signals. Setting the signals high +5 volts with a common ground did not work. The datasheet for HSS86 shows a common 5v with a on signal represented as pin output low. This requirement means that GRBL is not working and need to configure GRBL to invert the high/low signals.
Progress
20-09-2020
12-09-2020 The datasheet for the HSS86 shows that all the +5v pins should be connected and the signal pins pulled low.
09-09-2020 The plan is to feed the HSS86 driver with the same signals as standard stepper motors. This is to send +5v to the STEP, DIR and ENABLE pins and have all the grounds connected together. I GRBL to send the pulses with universal gcode sender. After a few hours of fiddling nothing worked.
