How is everyone controlling their Re-Arm? Do you have a graphical LCD attached to it? Using the Ethernet adapter? Or using a computer connected up using Octoprint / Repetier host? Interested to hear how you guys have set it up.by nebbian - General
Quoteo_lampe RADDS unleashed! After finding the reason for the vibrating steppers, I replaced the RAPS128 drivers on X & Y axis of my CoreXY with the CF1-modded TMC's Not only can I print small circles much faster, but I could also crank up the acceleration from 500 to 2000mm/s²! The printer almost jumps from the table now And it is still silent in spreadcycle mode. Replacing drivers: savby nebbian - General
Thanks DC42, I'll try that. Any suggestions on speed? The faster the better? Also I assume a reflective filament would make it easier to see the moire pattern? Also I assume this test is only valid for deltas, not cartesian printers?by nebbian - General
It could be due to distortion correction? Try sending: M322 S1; G33 R0; Otherwise your steps/mm might be way off, try moving the effector down 100mm in Z after homing, and measure how far the carriages move.by nebbian - Delta Machines
Can you post a link to the video please? Strange problem indeed.by nebbian - Delta Machines
QuoteDjDemonD You have had some good advice and if you follow it you'll have a really good printer (and spend quite a lot) but then quality isn't cheap. It's a case of differing points of view in term of what is money well spent on components. These Chinese rails really are ruining my prints. +1 on DJDemon's slightly veiled assertion that cheap linear rails are better than no linear rails.by nebbian - General
Thanks for that, DC42. What would be a good model to print, to demonstrate the issue?by nebbian - General
I suspect heatbed flex. Try turning the heatbed off as soon as the print starts.by nebbian - Delta Machines
I'm pretty sure it's really happening, not just marketing. Also it seems to be mostly done for deltas, which are not linear in how the motor movements map to the nozzle movement. DC42 seems mention it quite often, so it must be important. I'm just trying to figure out a good test to demonstrate what difference it makes.by nebbian - General
DC42's version of RepRapFirmware claims to be "Segment Free". What this means is that in other firmwares, when moving between two points, the moves will be chopped up into about 100 moves per second, and the head will move in that many straight lines. In segment free movement, the head will move as precisely as the microstepping will allow. What I'm trying to figure out is a good test to seeby nebbian - General
Mine is still in stealthchop mode, and resonates at around 150 mm/s at 160 steps/mm. It resonates between around 140 and 160 mm/sec. That's 9000 mm/min for those who are that way inclined This was on a delta, moving the carriage in Z direction for 100 mm, using Repetier and RAMPS. Just another data point.by nebbian - General
Let's say you have a printer, and you're not sure if the firmware is segment-free. How would you go about testing it? Can anyone point me to a good test to figure this out please?by nebbian - General
Yep, mine definitely resonate at a certain speed. I've noticed it when going from the home position to the bed at the start of a print, when the speed multiplier is at 200%. Perhaps we can all note the speed and try to correlate this to steps/second? Be interested to hear if the speed is the same for all.by nebbian - General
Mine arrived today! Looks good. I'm going to have to get a graphic LCD to attach to it, apparently it doesn't support 4x20 line LCD panels. Also in the order were some of the panucutt SD6128 drivers. I think that these should work quite well. 128 real microsteps! Feel the power! I think I need to build another printer to put this in.by nebbian - General
Which slicer are you using?by nebbian - CoreXY Machines
Ah OK, that looks better. Can you try a print without those belt tensioners, using a more conventional belt tensioning system?by nebbian - Delta Machines
That's some lovely layer registration there!by nebbian - General
Holy... I just saw this. Is the belt between the carriage and the top pulley not parallel? It looks like you might be using really large idlers, with the belt attachment on the carriage a different width to the diameter of the idler. No wonder you need spring tensioners. As the carriage moves down, you'll lose belt tension, meaning that it's harder to overcome stiction.by nebbian - Delta Machines
Quoteayudtee Zulance, Based upon your "The bigger the circles got the cleaner around they became" observation, I think that the magnetic joints around the effector may be binding up. The photo attached to your first post ( when zoomed in) seems to show the magnetic rod ends on the effector completely covering over the joint balls instead of only cupping the top half of the ball like the connectiby nebbian - Delta Machines
QuoteZulance I have a file with a bunch of circles, but I am unable to crop it down to a size lower than 610kb. My belts are tight, but not overly tight. I use belt springs so that all of the belts have the same tension on them, as the belt stretches the spring compensates for the stretch. I made sure everything was tight, no gear slippage etc. the only thing I can think of is a formatting errorby nebbian - Delta Machines
Yes, that's what's going on. Try printing a bigger part and you'll end up with a print failure. You need to ensure that the bed is at exactly 90 degrees to all the towers, then calibrate the endstops as per the above links.by nebbian - Delta Machines
Well done on getting it printing! If your back right brim isn't touching, then you haven't levelled the bed, or calibrated the endstops. The first thing to do is ensure that your plate is at 90 degrees to all towers. Then look at the two links I provided above, they will help you to sort out the endstop calibration. Otherwise google "Delta Calibration". It's painful, tedious, frustrating, buby nebbian - Delta Machines
I've been scratching my head over this one for a while. The problem is that the bowden tube isn't straight, due to the extruder section being offset from the motor. This results in sloppy retracts. So after a few iterations, I was no better off, until I added another spring to support the motor: Ta-Daa! Straight bowden tube! It is free to move all around the bed, and at the extremitiesby nebbian - Delta Machines
Quoteo_lampe There's good news and bad news about the white V1.2 TMC's: Bad news: The jumper settings are not recognized by the chip. It will run in 16/256 stealthmode, no matter if you do the CF1_to_GND wire hack. You have to bridge the outermost solderpads on the backside. ( The ones I thought were CF0-5 ). I found out, because I wanted to configure the Z-stepper in quadstep/256 interpolatingby nebbian - General
Glad to hear that you're making progress. These links might help with calibration:by nebbian - Delta Machines
Can you please print a couple more circles, at varying diameters, and take some photos? I was sure that it was to do with stiction. Also how tight are your belts?by nebbian - Delta Machines
QuoteUscstaylor Mine looks different but you talking about the Z axis Travel feedrate correct? Also I haven't been able to move my extruder motor. I think something might be commented out in the firmware. Yep, Z axis travel feedrate. You probably can't move the extruder motor because it won't turn while the hotend is cold. This is a safety measure to stop the extruder motor trying to push filaby nebbian - Delta Machines
The X tower is the left, Y tower is right, Z tower is rear. Moving positive in the X direction moves the effector towards the right, moving positive in the Y direction moves the effector towards the back of the bed, moving positive in Z moves the effector up.by nebbian - Delta Machines
Repetier host has the same option, it's just hidden in the printer settings.by nebbian - Delta Machines