1

Topic: wanted , printrboard rev e

well I guess I fried my present board. Anybody have  an extra one?

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

2

Re: wanted , printrboard rev e

I hope you find one, in the mean time you might want to look into upgrading wink

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

3

Re: wanted , printrboard rev e

yea I was looking at the  new dual ext SD's, but the lead times are like same ol same ol. Maybe I'll get a SD4.

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

4

Re: wanted , printrboard rev e

He meant upgrading to a better board.

5

Re: wanted , printrboard rev e

elmoret wrote:

He meant upgrading to a better board.

I did, but upgrading to a newer printer is also an option wink

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

6 (edited by satman49 2014-09-20 23:24:40)

Re: wanted , printrboard rev e

WARD  , what board do you have? Is this it?  RUMBA Board incl. 6 A4988 driver

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

7

Re: wanted , printrboard rev e

Same board but I went with the 8825 steppers.  You can switch them to 1/16th if you need extra torque for say the Y-axis.

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

8

Re: wanted , printrboard rev e

wardjr wrote:

Same board but I went with the 8825 steppers.  You can switch them to 1/16th if you need extra torque for say the Y-axis.

1/16th drivers and 1/32 drivers will produce the same torque at a given shaft position. Might be good to look into microstepping a bit. smile

Explained:

Lets say you have a 1.8deg/step stepper, rated at 100 oz-in of torque.

at 0 degrees: 100 oz-in torque available
at 1.8 degrees: 100 oz-in of torque available

but if drive it with a 1/2 microstepping driver:

at 0 degrees: 100 oz-in torque available
at 0.9 degrees: 70.7 oz-in of torque available
at 1.8 degrees: 100 oz-in of torque available

So lets say your total load torque is 50 oz-in. Obviously, you'll always hit the desired position (0, 0.9, or 1.8deg). If your load increases to 80oz-in, then when you command 0.9deg the motor and load won't move - but they wouldn't have moved anyway without microstepping!

tl;dr: microstepping always helps, never hurts. Also tends to make the axis resonate/vibrate a whole lot less. Really no downside, as long as you recognize it isn't a perfect replacement for a gear ratio. If you need true accuracy at whatever resolution, then you can't count on microstepping - but if its microstepping or nothing, microstepping is better.

Actually, a permanent magnet synchronous AC motor is just a stepper motor with infinite micro stepping (1/infinity). Those have plenty of torque, they move trains. smile

9

Re: wanted , printrboard rev e

Good to know I just followed Adrian's advice and explanation.  Maybe he doesn't know everything wink or at least we might get him to show his face a little more often smile

Printit Industries Model 8.10 fully enclosed CoreXY, Chamber heat
3-SD3's & a Workbench all fully enclosed, RH-Slic3r Win7pro, E3D V6, Volcano & Cyclops Hot End
SSR/500W AC Heated Glass Bed, Linear bearings on SS rods. Direct Drive Y-axis, BulldogXL
Thanks to all for your contributions

10

Re: wanted , printrboard rev e

Well I found my old Sang board. I got the Printrboard because I could never get the firmware to update. So I fiddled around with the firmware  again and finally got it to upload without errors. Back to printing for now.

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

11

Re: wanted , printrboard rev e

Thanks for the suggestion Tim!  Now I can spend more money making a 5 axis machine using these:
http://www.teknic.com/video/clearpath_video_small.mp4