I need help from someone a lot smarter than me. Im’ not sure what I should set the driver currents for my steppers that I purchased a few years back from V-1.
They are the KL 17H248-15-4A. Form the part number I would guess they were able to handle 4 amps but the spec sheet says the max is 1.5. Does that mean 1.5 per phase so the max current I could set would be 3 or is 1.5max current I should be sending to them?
I need to get the most torque I can get without damaging the motors or getting them to hot.
I believe the stock V1 Firmware sets them at .8 amps. much more than that and they have potential to get warm enough to soften PLA parts they are mounted to. Generally speaking if you need more amperage than what the stock is set to there is either a build issue or a CAM issue. If you can give us some more info on what you are trying to fix or change that will give us a better idea of how we can help.
I have a 4x8 LR4 with the makita 701c. The weak point has been the X axis to to this point. My router is on its last leg so Im replacing it with a 1.5kw spindle in hopes that will give some more power to the cutting and ease some of the stress on the steppers but I’m now concerned with the z axis and the weight of the spindle. I have read in a few places that guys have been running the 1.5kw spindle without issue. I would just like to know the limitations when i get into it.
I currently have my x set at 1.2 and haven’t had any heat issues. I have been cutting some cabiunets out and it has gotten to the point that i can only run at 22 inches per minute cutting melamine without skipping steps. So i’m hoping the spindle will help fix that.
Check to make sure your core isn’t rocking at all. I have seen where a new build will have the bolts “set in” and need adjustments a few times. This can cause the core to bind some. Make very small adjustments! Just enough where all the bearings are touching the pipe and no more.
Also make sure you aren’t trying to cut with a dull bit. Make sure your RPM isnt too high and you are making dust instead of chips. Chips remove heat from the bit, dust doesn’t.
Check your core and swap out to a new bit and see what changes you see. Also keep a close eye on your stepper temps as the ambient temp rises. You don’t want them to get over 50C
The core is solid and moves freely. I went through 3 brand new bits on two sheets of melamine. i could get chips for a second until the x axis started to shudder and lose steps. The only way I could get it to cut without issue was to slow the feed way down which in turn started to create dust.
This is what is pushing me to the spindle. If my makita is on its way out i’m thinking that could be a contributing factor.
Do you happen to know what the max amp rating truly is on these steppers and is there a stronger nema 17?