Hi.
When i print in layers finer then 0.2mm, I can see the resolution of the XY axes in the resulting print.
Since the motors can rotate very fast, I am thinking about gearing the XY axes like 1:2 or 1:3 fore smoother results.
Has anyone done that?
Another option is to add some stepper motors with higher resolution but can the controller board handle it?
Hi jangermann,
[quote=“jangermann”]
Another option is to add some stepper motors with higher resolution but can the controller board handle it?[/quote]
you can of course use stepper motors with 400 steps, the board won’t mind. The motors should of course be of the right size, since motor and motor driver have to match, but that shouldn’t be too hard considering that there’s a bit of a size limitation due to the mounts, especially on the Y axis.
Apart from that, you’ll just need to adjust the steps per mm.
Note that there’s a limit to the number of steps that you probably want to watch: MAX_STEP_FREQUENCY, which is defined in Configuration_adv.h. In other words: if you increase the resolution too much, you won’t be able to use high printing (or travel) speeds any more. The actual number depends on your gear ratio, motor, microstepping and pulleys / belts.
Cheers,
kuraasu
Hi kuraasu
thanks for your answer.
I think I go for the easy way and buy high res stepper motors to the printer.
Found the current motor here: http://www.velleman.eu/downloads/0/infosheets/datasheet_spareparts_k8200_uk.pdf but what voltage do it require?
Maybe this can be used? http://www.cypax.dk/vare/26.000.10846
Thanks again.
Hi jangermann,
that’s why you set the reference on the motor driver board - the driver will power the motor at a set current and regulate the voltage accordingly. So, no problem as long as the motor’s requirements are inside the range of possible values for the driver (and this should be the case here, since the motor is rated for less current than the original one).
This is basically the same change in axis resolution that’s achieved by using drivers with 32 microsteps.
Usually, 1.7 A motors are a bit shorter than 2.5 A versions, however, it could be a good idea to check the length before buying. Maybe the shop can tell you directly, or give you the manufacturer’s part number.
Cheers,
kuraasu
Hi kuraasu
Thanks again.
Well since the high res motor is only 1.7A at 3V I guess it is not as strong as the velleman motor. Now I am thinking about problems with skipping steps ect.
I think I will try to find a 2.5A high res.
Hi jangermann,
you know that the stock motor, although being a 2.5 A type, is not actually driven at 2.5 A, right?
0.425 V equals 1.06 A, 0.55 V would be 1.38 A, in both cases peak (not RMS) current.
Cheers,
kuraasu
You are right.
Then it should not be a problem.
Thanks 