ScrewDrive Upgrade Kit (New and updated Thread)

[LanceCameron]

this didn’t work for me, I tried and tried and it would not come off, I could have been doing wrong somehow though I’m sure

[ClayCarson]

Lot of good ideas. Thanks

[Phantomm]

cut it with a dremel.

[LanceCameron]

The bearing puller worked like a charm.

[PatrickDunne]

I have wired all the motors up the same but only 1 Y motor works, they are moving very slowly so I will have to calibrate, this is the way I have them wired, is this right, everything moves freely by hand with the power off
red-red
green-green
black -black
blue-white

[Phantomm]

The y motors need to be wired identically.

[Phantomm]

And set the stepping to the lowest you can for now and adjust your steps per mm. On the gshield it’s done with jumpers and the Xcontroller with dip switches.

[TrevinLValdez]

What are the setting for the dip switches if I have the cnc4newbies Z. What are the setting for the 4th dip switch on all axis

[Phantomm]

@Sebmarchand

I’ll also use 8 v-wheels. Should I get the 5mm or the 3mm ones? IIUC I should order:

8 v-wheels (4 extra per plate)
4 eccentric nuts (2 per plate)
4 “normal” nuts (2 per plate)
30mm screw (diameter will depend on the type of v-wheels I guess).

Is this all I need? My upgrade kit is at the post office, can’t wait to come back from work to go pick it up!

@Sebmarchand

4 eccentric nuts (2 per plate)

I just re-read this. Go with eccentric spacers not nuts. Spacers are your friend. And place the smooth side of the precision washer for the vwheels against the aluminum for smoother adjustments.

[Phantomm]

@TrevinLValdez

What are the setting for the dip switches if I have the cnc4newbies Z. What are the setting for the 4th dip switch on all axis

@LarryM

Not necessarily. It is not a function of the TB6600, but it is a function of the stepper motor controller design.

When the TB6600 is requested to reduce torque it will reduce the motor current to 30 percent of the current limit value.

As an example, the X-controller has a user selectable reduction of torque based on the fourth switch in each micro-step selection DIP switch. When the switch is ON (from the pictures of the board I have seen it comes from Inventables set to ON) the X-controller will request a reduction of torque when there is an absence of step pulses for that motor. When the switch is OFF, no reduction takes place.

Each stepper motor controller that uses the TB6600 can elect to use this feature or not. It just depends on the external design.

This help?

[JeremySimmons]

Is it just me who put 8 v wheels on both sides?

When I disassemble my z-axis I will move them to the sides

[Phantomm]

Here is a kick back to one of my prototypes that took a lot of time and money to make but ended up as a failure:



Some critical dimensions were off and the fit and finish was way too expensive to meet the price projections.

[TrevinLValdez]

I have a strange sound coming from the left Y axis. It only happens in the front 6 inches or so. It sounds like a clicking sound. Happens both directions buy louder when going back in the Y. The rest of the Y axis sound OK. Just the front 6".
Any ideas?
Trevin

[Phantomm]

Sounds like a misalignment.
Pics would be helpful.

[LanceCameron]

is there a benefit to having them off? I’ll rip mine open today and shut them off, I apparently was not paying enough attention in CNC class, as that I had no clue about the 4th switch. lol

[HaldorLonningdal]

@LanceCameron

is there a benefit to having them off?

Yes, the motors will when at idle still receive full current from the driver for the duration of the time value defined with GRBL $1 (step idle delay)

[LanceCameron]

Thank you for the info, much obliged

[JustinBusby]

The only reason to use it would be heat savings.

And it’s reduced to 30%.

Turn it off/disable it.

[Phantomm]

Ummmmmm guys! Remember he is on a lead screw system. And that requires way less holding torque

[Phantomm]

Don’t you guys use nuts with pins through them?