That did it! Thanks Pomeroy.
I'm doing it because my carriage is heavy and moving at high speeds was jerking the whole machine around
Search found 115 matches
- Wed Dec 03, 2014 3:16 pm
- Forum: Software Forum
- Topic: acceleration?
- Replies: 2
- Views: 6652
- Wed Dec 03, 2014 3:16 pm
- Forum: Hardware
- Topic: Not enough holding power for z axis?
- Replies: 19
- Views: 34528
Re: Not enough holding power for z axis?
Thanks CNC, You're totally right. Found the setting in Sprinter last night which disables the motor after moves and got it to stay on. plenty of holding power now :) The Nema 17 probably would've worked too if it was set up like this. I took off the brake, motor was actually making some noise while ...
- Tue Dec 02, 2014 10:05 pm
- Forum: Hardware
- Topic: Not enough holding power for z axis?
- Replies: 19
- Views: 34528
Re: Not enough holding power for z axis?
Thanks Pomeroy. I've tried turning the pot, it gets stronger up to a certain point then seems to cycle back to 0 if you keep turning. (no mechanical endstop on the pot) I think it's at max voltage...at least as high as it could go before it cycles back. I was using a metal screwdriver though while i...
- Tue Dec 02, 2014 4:03 pm
- Forum: General
- Topic: Questions about Top-Down method
- Replies: 4
- Views: 10587
Re: Questions about Top-Down method
I've finally got an early prototype working using the top-down method, an Acer H6510BD, and Fun To Do Industrial Blend, but I'm having a few issues currently that I'm working on figuring out. First thing - leveling the print bed - what types of methods are good for this in a top down set up? There ...
- Tue Dec 02, 2014 3:57 pm
- Forum: Hardware
- Topic: Not enough holding power for z axis?
- Replies: 19
- Views: 34528
Re: Not enough holding power for z axis?
I've used DRV8825 Stepper Drivers from Pololu to drive Nema 23 motors on a Plasma Cutter CNC. They're really nice because they are pin compatible with A4988 drivers , so you can plug them into a RAMPs 1.4 board. Thanks Pomeroy! So I tried the nema 23 with the A4988s I had lying around and it works!...
- Tue Dec 02, 2014 6:49 am
- Forum: Software Forum
- Topic: acceleration?
- Replies: 2
- Views: 6652
acceleration?
Hi all, is it possible to have acceleration in CW? here are my sprinter settings // X, Y, Z, E maximum start speed for accelerated moves. E default values are good for skeinforge 40+, for older versions raise them a lot. #define _ACCELERATION 3000 // Axis Normal acceleration mm/s^2 #define _RETRACT_...
- Mon Dec 01, 2014 6:27 pm
- Forum: Hardware showcase / Build Logs
- Topic: DLP Top Down IT LIVES!
- Replies: 20
- Views: 45474
- Mon Dec 01, 2014 4:56 pm
- Forum: Hardware
- Topic: Not enough holding power for z axis?
- Replies: 19
- Views: 34528
Re: Not enough holding power for z axis?
Something like this? http://www.ebay.com/itm/Single-Axis-TB6600-0-2-5A-CNC-Engraving-Machine-Driver-Controller-Stepper-Motor-/321454918858?pt=LH_DefaultDomain_0&hash=item4ad834ccca or maybe this http://www.ebay.com/itm/2x-Single-1-Axis-TB6560-3A-Motor-Driver-Stepper-Board-CNC-Router-Controller-n...
- Mon Dec 01, 2014 2:41 pm
- Forum: Hardware
- Topic: Not enough holding power for z axis?
- Replies: 19
- Views: 34528
Re: Not enough holding power for z axis?
I was running 2 Nema23's with my RAMPS 1.4 and the Pololu's. I was only using a 12V 5A power supply and they seemed to work with no problems. You can bump it up to I think 30v if you need more but not sure why you would. The SLA printers dont really have to move the axis very fast. 12V is probably ...
- Mon Dec 01, 2014 2:37 pm
- Forum: Hardware
- Topic: Not enough holding power for z axis?
- Replies: 19
- Views: 34528
Re: Not enough holding power for z axis?
Looks like the brake is electronically separate from the motor? I suppose you could turn it on/off with a relay controlled by the aurduino and gcode. Us CNC mill guys often use counterbalances to offset a heavy spindle on the z-axis. Is that a ball screw that turns so easily when the stepper is dea...