Show all posts by user

Re: Z axis Brake - 4 years ago

You could put G91 G1 H2 Z0.1 G90 towards the end of config.g. We don't normally advise putting movement commands in config.g but in this case it seems justified. I am looking at various options to support motor brakes in RRF. One is to assign a pin as a brake for an axis, and turn it on whenever the axis motors are enabled. Another is to add a command to power up motors without moving them.

by dc42 - Reprappers

Re: Slow Heating of Hotend - 4 years ago

After you changed the hot end, did you tune the heater? Check that the heater wiring is in good condition with no signs of overheating at the connectors. Check that you have set the correct thermistor B parameter in the M305 command for the heater.

by dc42 - Ormerod

Re: Kossel Delta xxl build project HELP - 4 years ago

Swapping the red and blue wires over will reverse the direction of movement of the motor. That's all.

by dc42 - Delta Machines

Re: CoreXYish IDEX - 4 years ago

I think that's almost equivalent to dual MarkForged kinematics, but it has the disadvantage that the A and B belt tensions will tend to twist the X axis. CoreXY IDEX has been implemented using CoreXYUV kinematics, CoreXYU kinematics, CoreXY+MarkForged kinematics, and dual MarkForged kinematics (and possibly others that I am not aware of). RepRapFirmware supports all of them.

by dc42 - CoreXY Machines

Re: Kinematic systems and linear guides - 4 years ago

I have Cartesian, Delta, CoreXY and SCARA printers. My take: - If you are on a tight budget, choose Cartesian and don't go large. Cartesian is more tolerant of mechanical inaccuracy and poor electronics/firmware than other architectures. - Deltas are great for single extrusion, but need to be mechanically precise and have capable electronics and firmware. My go-to printer is the delta. - Core

by dc42 - General

Re: RepRapFirmware CMake Build - 4 years ago

Use the library commits tagged 3.1.0 for the RRF 3.1.1 build.

by dc42 - Firmware - experimental, borrowed, and future

Re: Any inexpensive robot arm kits using stepper motors? - 4 years ago

Thanks for the suggestions!

by dc42 - Polar Machines, SCARA, Robot Arms

Re: smart effector - Error: G30: Z probe 0 not found - 4 years ago

That's ok if you never need to adjust the sensitivity. To adjust the sensitivity as well you need C"zprobe.in+zprobe.mod".

by dc42 - Delta Machines

Re: smart effector - Error: G30: Z probe 0 not found - 4 years ago

Your M558 command is missing the pin name parameter.

by dc42 - Delta Machines

Re: Different sensors for Z height and bed leveling - 4 years ago

Yes that would be possible.

by dc42 - General

Re: Intermittant diagonal layer shift, how to diagnose? - 4 years ago

If you think the issue may be that the Z axis isn't moving enough, have you tried reducing Z axis acceleration?

by dc42 - CoreXY Machines

Re: Different sensors for Z height and bed leveling - 4 years ago

RepRapFirmware supports multiple Z probes, so it could handle this arrangement without multiplexing a pin.

by dc42 - General

Re: Intermittant diagonal layer shift, how to diagnose? - 4 years ago

Have you tried connecting the Y motor to the E1 motor output yet, to rule out a problem with the driver?

by dc42 - CoreXY Machines

Re: Ormerod 1 cant communicate via Pronterface or Web interface - 4 years ago

It's very rare for the heater mosfets to fail, so I suspect a firmware or configuration issue. Try reinstalling firmware using Bossa. You might like to try more recent firmware. The latest firmware for your board is version 1.26. If you do upgrade the firmware, you will also need to update the web files on the SD card, and make some changes to your config.g file.

by dc42 - Ormerod

Re: Intermittant diagonal layer shift, how to diagnose? - 4 years ago

I agree, the most likely explanation is a bad connection somewhere. Most likely a crimp connection, but I once saw and instance of one of the pins of the motor connector not being properly soldered to the PCB. Also possible, but unlikely, is a bad solder joint between the driver chip and the PCB. Are you using all 5 drivers? If not then you could rule out the driver by reassigning that motor to

by dc42 - CoreXY Machines

Re: Kossel Delta xxl build project HELP - 4 years ago

Have you lubricated the magnetic joints? I use a little silicone grease.

by dc42 - Delta Machines

Re: SKR 1.3 "multi" neopixel - 4 years ago

QuoteDust neopixel's are the absolute worst when it comes to 3d printers A 3d printer requires very precise timing in order to print nicely without 'zits' blogs etc. Neopixles also require very precise timing. If you add to many Neopixel it will interfere with 3d printing. That's true if you bit-bang them. On Duet 3 we use an SPI peripheral and DMA to drive them without interfering with the pr

by dc42 - Firmware - Marlin

Re: Duet web interface 3.1.1 print duration? - 4 years ago

You can add WiFi using a nano router such as the TP-Link WR802. Although Duet Web Control doesn't currently display the duration of the last print, if running firmware 3.1.1 you can retrieve it from the object model. It's called "job.lastDuration". So you can send: echo job.lastDuration and the time in seconds will be echoed to the command line. A slightly more sophisticated way is to put the

by dc42 - Duet

Re: Which Kit? Railcore? SecKit? Other? - 4 years ago

It's a question of whether you prefer mechanical complexity or electrical complexity. If you are more comfortable with mechanics, you will prefer a single Z motor driving all 3 leadscrews with a closed loop belt, and bed levelling screws to get the bed level. If the frame is sturdy and rigid enough, once levelled it should stay levelled. OTOH if you are more comfortable with electrical complexity

by dc42 - CoreXY Machines

Re: mixing nozzle vs dual nozzles - 4 years ago

It's possible to cut that extra time dramatically. See

by dc42 - General

Re: RepRapFirmware 3.0 port for LPC1768/9 based boards - 4 years ago

Deleted.

by dc42 - Firmware - experimental, borrowed, and future

Re: Wattage rating for 24v power supply for smoothie - 4 years ago

Quotejbernardis I was planning on swapping out the fans and the extruder heat cartridge for 24 volt versions, and the bed has an alternate connection configuration for 24 volts. At first glance, this would tell me that the 15 amp 24v PSU is fine, except that I would guess that the bed draw does not halve. It probably will continue to draw 11 amps at 24 volts which won't leave enough for the oth

by dc42 - Smoothie

Re: Duet 2 Maestro power questions - 4 years ago

Yes you can run a 12V 40W heater from an extruder heater output on the Maestro. Use the screw terminal connector which is rated at 5A, not the 2-pin Molex connector which is rated at 2A.

by dc42 - Duet

Re: First Layer / Auto Delta Calibration - 4 years ago

I think there is a mechanical problem with one of the arm joints, most likely an arm on the right hand side of the height map; or with a bed probing contact on the left hand side.

by dc42 - Fisher

Re: FLSUN QQS irregular first layer - Out of ideas - 4 years ago

You can also run RepRapFirmware on MKS 32-bit boards.

by dc42 - Delta Machines

Re: RepRapFirmware 3.0 port for LPC1768/9 based boards - 4 years ago

QuoteChemaFuji Hi all again! I have a mystery on my setup, from installing the v3.1.0 the machine is not able to make the height map file. I run the G32 correctly, then try the G29 and it goes to everyone point to measure, but when it finishes, no heightmap.csv file nowhere... Initially, my mind was the file is corrupted or read-only or... so I deleted it, no luck. The strange thing is that afte

by dc42 - Firmware - experimental, borrowed, and future

Re: Ormerod with PrusaSlicer? - 4 years ago

Thanks for pointing out the error in my post, which I have now corrected. It's actually the other way round: the specification says M203 takes mm/min (like the F parameter in G1 commands) but PrusaSlicer generates mm/sec.

by dc42 - Ormerod

Re: Problem with Mini Differential IR height sensing board - 4 years ago

Most likely the wire between OUT on the IR sensor and the IN pin on the Duet Z probe connector has broken.

by dc42 - CoreXY Machines

Re: Ormerod with PrusaSlicer? - 4 years ago

If you set the profile in PrusaSlicer to RepRapFirmware then I think it should be OK. Otherwise, PrusaSlicer tends to put M203 commands in the generated GCode file. Even though M203 has be defined to expect values in mm/min for the last six years, Prusa Slicer puts mm/sec values in the M203 commands that it generates. Hence the very slow movements.

by dc42 - Ormerod

Re: Home Z leaves nozzle 5mm above bed! - 4 years ago

QuotePeterSimpson The presence of the G92 Z0 in my homez.g file was wrong in that it was setting the position after leaving the G30 command (i.e. the trigger height + 5mm) as Z=0! After removing the G90 Z0 command it now works as it should, and G1 Z0 moves the head to just touching the bed. That's exactly right. I'm glad you sorted it.

by dc42 - Ormerod