Re: Suggestions for mounting stepper Z #MODS
¿ªÔÆÌåÓýYou have to look at the torque requirements of your system and then decide.? Even pulleys with 1:1 do allow easier mounting but the costs are higher.? ? I milled an adaptor that fit on the lead screw shaft and had a hex head so I could use a torque wrench to see what was required to move the carriage from a stopped state.? Static friction is higher than dynamic.? Once I had that number I figured that the 300 oz-in motor at about 700 RPM would still have enough torque to move the carriage at 300 RPM.? ? Or just clamp something onto the leadscrew with an arm that is 12" long and set it horizontal.? Then add weights at the 12" point until it starts to turn.? That's your minimum torquein 12" x ounces ?required to just move it slowly.? The cutting load I don't know how to calculate. ? But look at the motor curves to determine at what RPM your torque drops to a point where the motor will lock up and then add a 50% safety factor.? Or so. ? John ? ? ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Ralph Hulslander
Sent: February-01-20 1:46 PM To: [email protected] Subject: Re: [digitalhobbyist] Suggestions for mounting stepper Z #MODS ? I was wondering about speed reduction from using pulleys. ? Would mounting direct to lead screw work? Might take some ugly mounting jig. ? Ralph ? On Sat, Feb 1, 2020 at 4:23 PM John Dammeyer <johnd@...> wrote:
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