All versions of the Duet use a MCP4461-103E 4 channel digipot to set the current on X,Y,Z and E0 stepper channels. The MCP4461-103E is an I2C controlled chip and as DC42 points out I2C is not something you want to be using inside an ISR. On the Duet 0.8.5, rather than add another digipot chip for 1 more stepper channel I used the DAC0 output from the chip (once again DC42's idea!). I have not plby T3P3 - Controllers
Hi All I have published a blog post about the new version of the Duet electronics that supports dual extruders on board (or up to 6 extruders with the Duex 4) Duet 0.8.5 Blog Post Let me know what you think!by T3P3 - Controllers
Fantastic Work Radian You can get PWM out of the FAN 0 FET. For example if you set the fan speed using M106 SNNN from 0-255. Cheers Tonyby T3P3 - Laser Cutter Working Group
Tomin You can change axis directions in firmware or reverse the motor connector. Cheers Tonyby T3P3 - Sanguino(lolu)
Neosolon Those look within the correct ball part for standard nema 17s like we supply. As you say it works on the Y axis and not the X then it could well be the hardware. Please get incontact by email to arrange a replacement. Regards Tonyby T3P3 - Delta Machines
Hi Neosolon I see you have got in touch by email. We will sort out a replacement board if required. Can you confirm you are setting the stepper current in config.g: M906 X800 Y800 Z800 Or something similar, if you set it very low then then you would have issues, eg a typo like this: M906 X80 Y800 Z800 If thats not the case then it looks like we need to exchange the board. Tonyby T3P3 - Delta Machines
UPDATE: We should get an initial block of boards from David tomorrow or Thursday post dependant, and the screens have just arrived. We will begin testing ASAP and will soon be contacting those who have pre-ordered boards to give them a confirmation of shipping dates. We will fulfil all pre-orders before opening up sales on the website to general orders, in the order that the pre-orders were placby T3P3 - Ormerod
Hey Capinho you can try our documentation. Some will be different from the standard as its specific to our kit but in general it will help. Kossel Mini Documentation. Cheers Tonyby T3P3 - Delta Machines
Update: The kit is available for pre-order, please see this post:by T3P3 - Controllers
For those of you who want a complete Kit the pre-order is up on our website: PanelDue Kit from Think3dPrint3d As it says in the product description we have not yet received the bulk batch of displays, so while we aim to start shipping the kits soon after David finishes production of the boards - its not guaranteed. The kits will contain David's board, a 4.3inch Display, cables and will be indby T3P3 - Ormerod
I can't give a time line on the next version yet i'm afraid. Regards Tonyby T3P3 - Controllers
As David has said we have ordered a bunch of his boards and are in negotiations with a screen supplier to bring the price down. We will announce the details shortly (next few days) and put a pre-order up on out website for those who want the complete Kit. We aim to cost broadly the same as self sourcing each of the components (+ a small amount for labor and testing). We have tested the pre-prodby T3P3 - Ormerod
As DC42 days the Duet+Duex4 temperature noise issue is only really apparent at room temperature. I picked 1K resistors for the Duet specifically to improve the temp response at printing temperatures (where it matters). In addition the termal mass of the hotend means that the actual temperature is not changing. I will improve the analogue ground in the next version, in the meantime if it is a bothby T3P3 - Controllers
Glad you found the problem and I was able to help, cheers!by T3P3 - Delta Machines
Nice to see this idea resurfacing. For the seminal work on this check out RichRap's blog: Multicolour prints and a filament joiner: How to post process your gcode to be selective about colours at layer changes. Tonyby T3P3 - Ormerod
Hi Uklan The blog post is out of date now if you use the most up to date packages but it still works fine if you use the older ones - have you tried that? Cheers Tonyby T3P3 - Firmware - mainstream and related support
If you have one axis that works you can test each stepstick on that acis to see if they are fried or not (ensure you power down between swapping them). Also check your endstops (M119) if they are not working they could be inhibiting axis movement.by T3P3 - Sanguino(lolu)
Hi Tomin To answer your first question last, you can check the FTDI by brindging between TX and RX and confirming that anything sent is echoed on your terminal emulator. Generally it only damages the sanguinololu if 12V are connected in the wrong place, connecting the P2 cable back to front does not normally have this effect however it clearly did in your case. If its 12V in the wrong place (fby T3P3 - Sanguino(lolu)
Hi For a "standard" Z axis you should be able to run at around 0.8A with no problems. The microstep test you outline makes sense because as you move from 1/16 to full steps you would naturally get faster movement for the same step rate. Have you tried swapping the drivers/motors to confirm they are correct - you mention potential hardware issues with soldering but you also say that different fby T3P3 - Firmware - mainstream and related support
Hi loader It could be that the stepper driver is simply not set high enough to overcome the friction - try turning up a small amount (1/8th of a turn) and see if that improves the situation. Tonyby T3P3 - Firmware - mainstream and related support
Hi Adam Which version of Marlin and Ardunio are you using? Also can you confirm if Marlin compiles fine without the panelolu2 enabled in firmware? Cheers Tonyby T3P3 - Reprappers
I was half joking, but it certainly has a log of pins and expansions, you can route enough pins away without needing 4 layers but you would not get all 144. It definitely overkill thoughby T3P3 - Ormerod
Or go for the SAM3X8E and be done with it!by T3P3 - Ormerod
Also this might be helpful: Its the menu tree for the standard marlinby T3P3 - Controllers
If you are running marlin then you should be able to go to Prepare->Home all Cheers Tonyby T3P3 - Controllers
Hi RichK I will add it to the documentation - the Melzi boards we have had all got those pin headers soldered on by default so It did not occur to us to mention that! Regards Tonyby T3P3 - Controllers
You may like to check out the fixing method we use for the lasecut acrylic enclosure on our Mendel90 kit: Cheers Tonyby T3P3 - Mendel90
Another option for those wanting more functionality is the Active8. Active3d (Justin Carpenter was exhibiting at the reprap community hub at the TCT show) have released the info on youmagine: This looked great at TCT although I did not get a chance to play with it much. Cheers Tonyby T3P3 - Ormerod
My 2c would be to go for a simple screen and encoder or similar to preheat, change filaments, make simple adjustments, start and stop prints from SD and similar. You can add a ethernet to wifi bridge to the duet for <30 (or free if you have an old wifi router). That allows you to use any laptop/tablet/smartphone for more complex operations. The web interface could be optimised for smaller scrby T3P3 - Ormerod
Hi ChrisT88 We have found that the Delrin V roller design works really well and, like the recirculating balls, is much cheaper than the slide. For the electronics a RAMPS is a tried and tested solution but ii should work with Printrboard no problems. Its key to get the parts printed accurately and the extrusion and effector arms all cut/made accurately so the printer is assembled true. I willby T3P3 - Delta Machines