DIY CNC - HELP NEEDED - X Axis Jumps

[CNCwoodMan]

Looks like a re-branded Leadshine DM-542... AmericanMotionTech is now selling the DM-542E for $39.95 each, a pretty good bargain.

Leadshine DM542E stepper motor drive / controller

Thanks, going to have to replace drive boards because I literally cannot find a replacement. Probotix said the company stopped making those 4 years ago

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[louieatienza]

Thanks, going to have to replace drive boards because I literally cannot find a replacement. Probotix said the company stopped making those 4 years ago

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This is a good thing, because DM542 is far more feature-rich than the old Probotix drives. I still would consider at least one of the mechanical upgrades mentioned.

[louieatienza]

Ok, do you guys have any suggestions on breakout boards?

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I don't see any problems with the breakout board you already have... you should be able to find a schematic of the pins and match them up to the new drives. You just need the step+, step-, dir+, dir-, ena+, and ena- from the Probotix board to the Leadshine drives. Then you just need to connect the stepper leads and power supply to the drives. Should be relatively easy.

[ger21]

https://cnc4pc.com/motion-control/br...face-card.html

[CNCwoodMan]

Guys, buddy of mine found a probostep board he had used on a 6 wire step motor setup. Since I burned my other board out he gave it to me hoping it would work. Question of the day is how do I wire the 4 wire motor up to this board that has 6 pins + 2 for power and ground.

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[CNCwoodMan]

I should add I tried wiring already and no output to motor. I co firmed after blowout that motor is working attached it to another board and it works. So I know the problem is either wiring board or the board itself won't work with a 4 wire motor.

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[ger21]

That's a unipolar drive, and it won't work with a bipolar (4 wire) motor.

[CNCwoodMan]

That's a unipolar drive, and it won't work with a bipolar (4 wire) motor.

Figured and Thanks! Just how this is expected to turn out lol!

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[CNCwoodMan]

I don't see any problems with the breakout board you already have... you should be able to find a schematic of the pins and match them up to the new drives. You just need the step+, step-, dir+, dir-, ena+, and ena- from the Probotix board to the Leadshine drives. Then you just need to connect the stepper leads and power supply to the drives. Should be relatively easy.

Thanks, so i was thinking that and did a little research and believe I have found the schematic. Question is, those ribbon cable wires are a super small gauge do you think they will suffice for the screw terminals on driver board?

[ger21]

Yes, they'll be fine.

[louieatienza]

Thanks, so i was thinking that and did a little research and believe I have found the schematic. Question is, those ribbon cable wires are a super small gauge do you think they will suffice for the screw terminals on driver board?

Yes, they're only delivering 5V at tiny current...

[CNCwoodMan]

Guys, really appreciate the help here! You have saved me significant pain and suffering!

I have purchased the new driver boards and will post results of the install. Thanks again!

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[CNCwoodMan]

Alright, Z driver is in. Working but now after testing I am noticing a stupid issue I am sure..... when I home Z the machine coordinates are not showing 0, they are showing -0.86.....

Other problem I am noticing is that when I start a gcode program the z goes all the way up and hits limit. Any ideas here?

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[ger21]

Go to Config > Homing/Limits, and make sure there's nothing in the Home Off column.

And your g-code is probably sending it up into the limit switch.

[CNCwoodMan]

Go to Config > Homing/Limits, and make sure there's nothing in the Home Off column.

And your g-code is probably sending it up into the limit switch.

Thanks, nothing there. Seems that I have somehow overcome that issue with modifying gcode and removing home command on initial lines..

What I can't seem to get over is, jogging z axis works fine, but when program goes to cut it ignores all depth cuts and just carries out rest of program on Z -0. Almost like it ignores z commands with no error or anything

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[ger21]

Do you have Z Inhibit turned on?

[CNCwoodMan]

Do you have Z Inhibit turned on?

No sir, should it be?

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[CNCwoodMan]

No sir, should it be?

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Well, trial and error and research would say that info not need it enabled. I have went through everything I could possibly think of....steps per unit, code, m3 settings.....it will not accept any code commands yo go down a negative z length. Pretty sure it does not accept any z whether it's positive or negative movement which is beyond mind boggling. I can jog either direction no problem!?!?!

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[louieatienza]

Well, trial and error and research would say that info not need it enabled. I have went through everything I could possibly think of....steps per unit, code, m3 settings.....it will not accept any code commands yo go down a negative z length. Pretty sure it does not accept any z whether it's positive or negative movement which is beyond mind boggling. I can jog either direction no problem!?!?!

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Is Z scaling set at 1?

[CNCwoodMan]

Is Z scaling set at 1?

Yes, I am confirming this on the first/main screen of mach3

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