Search found 37 matches

by EccentricWorkshop
Mon Apr 19, 2021 8:05 pm
Forum: GRBLDuino
Topic: GRBLDuino MegaShield w/ optical limit switches
Replies: 2
Views: 326

Re: GRBLDuino MegaShield w/ optical limit switches

I haven't heard of anybody using optical limit switches but many are using 3 wire inductive switches. I'm assuming they are similar with power, ground, and signal. It should be a matter of connecting the signal line to the limit switch port on the shield and tapping into power and ground. For troubl...
by EccentricWorkshop
Mon Jan 25, 2021 10:45 am
Forum: GRBLDuino
Topic: Cloning on Duino Mega Lite
Replies: 2
Views: 372

Re: Cloning on Duino Mega Lite

The best and easiest way is to run a second driver off the Y axis ports.
by EccentricWorkshop
Wed Oct 14, 2020 4:44 pm
Forum: GRBLDuino
Topic: No signal on Z endstop terminals + messed up endstop lables
Replies: 1
Views: 474

Re: No signal on Z endstop terminals + messed up endstop lables

I'm not sure about the switched X and Y; it hasn't come up before from anyone. The GRBLDuino Uno Shield schematic (last page of the attachment below) shows them connected to the Arduino's D9 pin for the X limit and D10 for the Y limit which matches the pin mapping found in the cpu_map.h file of GRBL...
by EccentricWorkshop
Wed Oct 14, 2020 3:56 pm
Forum: GRBLDuino
Topic: Debugging GRBLDuino issue
Replies: 10
Views: 1496

Re: Debugging GRBLDuino issue

I don't see any reason why it wouldn't work as long as you can get a good solder joint between them.
by EccentricWorkshop
Sun Oct 11, 2020 11:09 am
Forum: GRBLDuino
Topic: Debugging GRBLDuino issue
Replies: 10
Views: 1496

Re: Debugging GRBLDuino issue

After that, behavior was (unexpectedly) still the same. No motor response to anything until I squeezed that corner, then arcing/popping and motor twitching while I held it. Could this be an issue with the factory soldering, or something broken inside that part of the screw terminal component? It se...
by EccentricWorkshop
Thu Oct 08, 2020 12:30 pm
Forum: GRBLDuino
Topic: Debugging GRBLDuino issue
Replies: 10
Views: 1496

Re: Debugging GRBLDuino issue

Sounds like a bit of progress. It is starting to sound like a power issue. Have you tried turning the current adjustment potentiometer while trying a movement? Certainly not the best way to set things, but it is a good way to diagnose. It may also be the microstep settings are requiring more current...
by EccentricWorkshop
Tue Oct 06, 2020 6:53 pm
Forum: GRBLDuino
Topic: Debugging GRBLDuino issue
Replies: 10
Views: 1496

Re: Debugging GRBLDuino issue

The first question is have you set the current limit on the drivers? There is a section on how to do it on the Pololu page ( first link on the Resources tab under Recommended links). If the steppers aren’t making noise or jittering, it leads me to think it’s a power issue. Do the steppers lock up on...
by EccentricWorkshop
Sun Aug 02, 2020 7:51 pm
Forum: GRBLDuino
Topic: Enable pin
Replies: 3
Views: 1000

Re: Enable pin

The stepper enable pin is the top most pin on the left side of each stepper driver socket. It's shown on the schematic on the datasheet in each A4988 Carrier block.
by EccentricWorkshop
Sat Aug 01, 2020 10:41 am
Forum: GRBLDuino
Topic: Enable pin
Replies: 3
Views: 1000

Re: Enable pin

What do you mean by enable pin? To enable what? GRBL has a coolant enable which goes to the coolant terminal block. There is also a stepper enable/disable which is routed from the Arduino Uno pin to the stepper driver pin. It will controlled automatically by GRBL and your software. GRBL doesn't dire...
by EccentricWorkshop
Fri Jun 26, 2020 10:49 am
Forum: GRBLDuino
Topic: GRBLDuino with Arduino Due & G2core control system
Replies: 2
Views: 1057

Re: GRBLDuino with Arduino Due & G2core control system

Although the form factor is the same for the Mega and DUE, the pinouts are different between g2 and 4 axis version of GRBL which is what causes the issues. Comparing the g2 DUE pinout with the Mega Shield pinout , there are quite a few differences in the pin functions/assignments. There may be some ...