Question Stepcraft 2 again with Nema 17 instead of Nema 23!

Is it not disappointing that stepcraft 2 is not with Nema 23 motors, but again with the weaker Nema 17 motors?

Papje wrote: Is it not disappointing that stepcraft 2 is not with Nema 23 motors, but again with the weaker Nema 17 motors?

It kind of seems so. At first I got exited because I saw the 3000m/min figure, but then saw the same 1,4 A motors. Increased voltage might give better performance, but the threaded rod is 10x3. So now one turn gives 3mm instead of 2mm as before. Doesn`t this mean less torque? Looks like the increased speed came at the expense of ability to do more work. I could be wrong and misjudge the situation.

You can buy Nema 17 with decent torque(My i.e. have 65ncm), and i guess for Nema 23 with > 1Nm SC need a complete redesign of the mechanics.

I work With SC 840 original setting and im able to cut hard wood (Buche) With 8 mm tool f30 s20000
4mm deep full cut.

But AS well AS With a car With 450 horsepower, you can tune the SC without Any limits!

With the motors as standard 4000mm/min in X and Y is achievable for rapids if shes tuned well.

Running a stepper motor at a higher voltage can significantly improve the performance.

Run a NEMA 23 on 24V DC and then on 75V DC and consider the difference.

A well powered nema 23 will kill a STEPCRAFT

bvs wrote: I work With SC 840 original setting and im able to cut hard wood (Buche) With 8 mm tool f30 s20000
4mm deep full cut.

But AS well AS With a car With 450 horsepower, you can tune the SC without Any limits!

I tried cutting hard wood at 3mm depth and my Z axis lost a lot of steps. Definitely not trying that depth again.

Can the Z axis motor be changed to one like the Y axis? I mean, both are the same voltage but the Y axis has more power, correct???

I suppose the electronics can handle that.

jvalencia wrote: I tried cutting hard wood at 3mm depth and my Z axis lost a lot of steps. Definitely not trying that depth again.
...

Sorry but that doesn`t make much sense to me. You mean X axis?

tikka wrote:

jvalencia wrote: I tried cutting hard wood at 3mm depth and my Z axis lost a lot of steps. Definitely not trying that depth again.
...

Sorry but that doesn`t make much sense to me. You mean X axis?

The Z axis, if you enter a hard material at a certain speed, the motor will be forced for a while and will lose steps in each pass.

I'm adding ramps to every toolpath from now on to minimize this effect. And also slowing the plunge a bit.

jvalencia wrote: The Z axis, if you enter a hard material at a certain speed, the motor will be forced for a while and will lose steps in each pass.

I'm adding ramps to every toolpath from now on to minimize this effect. And also slowing the plunge a bit.

If your X and Y axis have no problems at cutting 3mm deep then all you need to do is to reduce the plunge, add ramps etc as you said. Cutting depth shouldn`t influence Z axis movement. I think you could say that Z axis "cutting depth" is the horizontal cross section of your milling bit.