Show all posts by user
Safety...
The listed heater is 320mm, so I assume it is for a bed 350mm or 400mm. If this is the case, it is too powerful, which can be quite dangerous. For a bed 400mm diam, 500W is sufficient.
I am using a 280W bed heater (280mm) for a bed of 300mm diameter, which is 0.4W/cm2 , and with a good bottom insulation (ceramic fiber), this is sufficient to go higher than 150°C (measured) and cook your effect
by
PRZ
-
Delta Machines
I made a compilation of release notes for :
DC 42 fork from 1.09 aDuet Web control from 1.08
RepRap_Firmware_release_notes
by
PRZ
-
Duet
David, For cartesian, did you average probe if you have more probing points than the required number of parameters, as done on Delta ?
by
PRZ
-
Duet
You can add as many probe points you wish, with M557 or in bed.g macro
The number of parameters taken into account (S parameter in G30) shall be less than the probe points number.
RepRap_Firmware_macros#bed.g
QuoteGaou
would it be possible to add some more probe points for bed levelling ? for now you can add a fifth point as i know. but it would be nicer if we can add some more.
by
PRZ
-
Duet
In the step 3, shall the result of M573 be timed by 255 (or 256), according this message ?
Quotedc42
PID adjustment
For the hot end, if you are getting overshoot then just reducing the S parameter will probably be the simplest way to cure it. Otherwise, here is one approach to tuning the PID constants:
1. Set S to 1.0, P to 20, B to 30, and I, D and T to zero.
2. Command the hot end to a hi
by
PRZ
-
Duet
A screw/nut may be interesting if you are running servomotors. There is work in progress on servo drivers here here and here
Due to high rotation speed, you will have inertia problems with difficulties to get accelerations, however servo controlled motors (or hybrid steppers) allow temporary current pulse much higher than what you can do on an open loop stepper which use continuously the s
by
PRZ
-
Delta Machines
Have a look on the RepRap wiki
RepRap_Firmware_macros#bed.g
and G-code#G30:_Single_Z-Probe
by
PRZ
-
Fisher
I have added a schematic on the wiki Delta geometry page. View from top.
Delta_geometry#Delta_columns_and_axis_names
AussiePhil, I found that in Repetier the A and B column names are reverted compared to your drawing, see , where did you get it ?
by
PRZ
-
Delta Machines
In Europe, supplying a MSDS on demand is compulsory. This shall take into account the dye.
Not doing so is unlegal and I think most filament sellers are way outside legality, not only for not supplying the MSDS, but also because using toxic additive, notably for dark colors.
Have a look at this particular post (and subsequent ones):
by
PRZ
-
General
Have a look on this schematic :
Duet_Wiring#Main_wiring
by
PRZ
-
Duet
Linear rod have two problems :
- If the rod are 8mm diameter, this is too small except for a quite small machine
- If bearing/rods are of poor quality, it is difficult to replace them and you have to rebuilt a big part of the machine to replace them. This only can be used if they are sourced from a reputed supplier.
For average or large machine you need rods diameter 12 or 16 and bearings are m
by
PRZ
-
Delta Machines
Buzzer - 7 years ago
I added a buzzer on my printer 'Lily' (Duet 0.6), that shall identical for a board 0.8.5
I used a buzzer SFM-27 as it is easy to find on ebay, low cost and low consumption (1.27 Euros, shipping included !). I have not the consumption at 3.3V, but it may be below 10 mA. Not very noisy at this voltage, but it may wake up you if you are having a nap on your keyboard.
Schematic :
I choose the pin
by
PRZ
-
Duet
David, if I well remember, your machine use low acceleration (2000) and have a relatively light effector. However, you use 0.9 stepper. This is not very demanding compared to some others machines.
My D-Box with similar steppers as yours is using acceleration 6000 (and was tested at 8000) with an effector weighting slightly above 200g. It works well, but I am only in 24V.
So, For tests, I think
by
PRZ
-
Duet
If final reaching setpoint is slow, you have to adjust PID.
For heating adjustment, have a look at this RepRap wiki page 'RepRap_Firmware_heating':
In M301, don't forget the T parameter, it is specific to RepRap Firmware DC42 fork, but it improves the control and I get much better result with the Fisher hotend while adjusting it (which is relatively easy).
I have not looked the firmware cod
by
PRZ
-
Ormerod
This particular post of Paul Wanamaker seems of interest for Nema23 use :
by
PRZ
-
Duet
David, I feel 3V is a very thin margin, I will be afraid of voltage spikes due to return current generated by deccelerating stepper, especially if you use higher inductance steppers and/or high mobile mass. In addition, if using Nema23 you get mid-band resonances, that may also creates spikes. 0.9° stepper will also increase return current for a given inertia.
Nearing the max voltage may need hi
by
PRZ
-
Duet
You may have a look to this reprap wiki page 'Delta_geometry':
Yes, the only 'rule' is the minimum angle for a given reachable diameter, you cannot use a percentage of the machine dimension as the position on the articulation relative to clearance diameter varies a lot depending the belts and fans installation.
Compared to 'Kossels', 'Rostock' like machines will have longer arms and larger r
by
PRZ
-
Delta Machines
Yes, belts dies from fatigue and fatigue for composite materials is a VERY complex matter.
What I want to point with the shapeoko link is this sentence in 'tensile chords' paragraph:
Quote
Steel cords have higher tensile stiffness, but can't be bent as tightly so they may require larger-diameter pulleys and idlers.
Quotedougal1957
Think it is the repeated bending/straightening that works hard
by
PRZ
-
Delta Machines
There is an interesting piece about belts on Shapeoko site:
So, it seems nothing could replace kevlar for belt reinforcment.
or , simply get larger belts or double them. RobotDigg sells wide and double pulleys for reasonable cost.
Quotedougal1957
Phil
Did you go with the Steel Cored GT2 belt if so What size pulley have you gone For?
Reason I ask is that I put some of it on a printer and it l
by
PRZ
-
Delta Machines
A clay printer need less speed than a filament printer, so you may accept a stepper with higher inductance, hence lower current, especially if you run high voltage.
With steppers Nema17 at 6.5 kg.cm and 1.5A like this one
You may run an effector of around 1kg with 16 teeth pulleys, if you go not too fast? You may play with arm length to limit overspeed at large diameter.
by
PRZ
-
Duet
Have a look at the reprap wiki page 'Choosing stepper for a delta'
by
PRZ
-
Duet
Pour le problème lié au vent, il existe pour les VMC des clapets (en principe on doit toujours en monter un).
en ligne :
en sortie :
Je pense que certains filtres d'habitacle peuvent filtrer les microparticules, il faudrait voir comment ils sont faits.
by
PRZ
-
RepRap Groupe d'Utilisateurs Francophone
N'hésitez pas à commenter cette page.
Nous voyons passer avec une régularité malheureusement bien trop fréquente sur le forum des questions du genre:
Mon moteur tourne, mais il perd des pas dès qu'il y a un effort, pouvez vous m'aider ? Mon moteur ne tourne pas, mais à la mise sous tension de ma carte, il est bloqué, donc 'quelque chose' fonctionne, qu'est-ce qui se passe ? J'ai un problème, qu
by
PRZ
-
RepRap Groupe d'Utilisateurs Francophone
It is clear that trying to recover the money without a trial was wise. Lawyers are costly and going through legal system is a very long process. So trying to recover till this is proven impossible is far from being stupid. Not speaking openly about it is an evidence, as it will have killed the project instantly.
Selling an unfinished house will get a fraction of the money which was poured in, so
by
PRZ
-
General
Have a look to this post :
where Adrian Bowyer explains that the stock remaining after RepRapPro closure will be split between the parents companies, RepRap Ltd being one of the parent company, the other being emaker.
by
PRZ
-
General
Pour la sécurité, en plus des pages wiki en anglais il y a ces liens :
- incendie
- sécurité
- santé
- santé
Ce n'est pas trop détaillé, mais c'est en Français
by
PRZ
-
RepRap Groupe d'Utilisateurs Francophone
This compact commercial unit (136x174x100- printclean scrubber) [3dprintclean.com]
do recirculation AND heat extraction (there is two fans).
It is adaptable to any enclosed printer/enclosure.
It extract heat via an exchanger, not by extracting air.
Very nice as an add-on on existing printers, but I think printers shall be designed from start with filtration in mind (this is what I have done fo
by
PRZ
-
General
Using expansion connector is workable, but not practical, that need to have flying components and 1 pin connections, and if I follow same schematic, there is also a capacitor to add. A safety feature shall be straightforward.
Quotedc42
QuotePRZ
May be too late,
but I already suggested to provide a supplementary thermistor input to control ambiant temperature (in or atop the printer) for fire sa
by
PRZ
-
Duet
May be too late,
but I already suggested to provide a supplementary thermistor input to control ambiant temperature (in or atop the printer) for fire safety.
by
PRZ
-
Duet